Dissertations / Theses: 'Paper printing'

1

Suffield, Sarah Rose. "Modeling the flow of a liquid droplet diffusing into various porous media for inkjet printing applications." Online access for everyone, 2008. http://www.dissertations.wsu.edu/Thesis/Spring2008/s_suffield_041808.pdf.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Charoenpholphibool, Wandee. "The study of paper surface efficiency /." Online version of thesis, 1989. http://hdl.handle.net/1850/11467.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Jonen, Benjamin Philipp. "An Empirical Analysis of Paper Selection by Digital Printers." Thesis, Georgia Institute of Technology, 2007. http://hdl.handle.net/1853/16180.

Full text

Abstract:

The Printing Industry is undergoing a Digital Revolution . The importance of digital printing has been increasing substantially over the last decade. How has this development affected the paper selection of printing firms? Only paper suppliers who successfully anticipate the changing needs of the printing firms will be able to benefit from the industry trend. This paper employs a probability model to analyze a survey data set of 103 digital printing firms in the USA and Canada. The research idea is to link the firm s paper selection with the firm s characteristics in order to gain insights into the printing firm s paper purchase behavior and the overall industry structure. The first part of this work investigates the importance of certain paper aspects, such as price, runnability and print quality. Strikingly, a company s involvement in digital printing, measured by the percent of digital printers of the total number of printers in the firm, is a central determinant of the importance of all paper aspects analyzed. This finding underscores the tremendous importance of the printing firms transition to digital printing for the Paper Industry. Paper runnability is found to become more important the faster the firm grows and can be explained by the fact that more successful firms incur higher opportunity costs from downtime. Another key finding is that the importance of paper price is lower for firms who collaborate with their customer on the paper selection and are able to pass on cost increases in the paper price. The second part involves a more direct assessment of paper selection. Here, the firm s characteristics are utilized to explain the choice of coated versus uncoated paper for the printing job. The analysis shows that firms involved in sophisticated print services, such as Digital Asset Management or Variable Data Printing are more likely to use the high quality coated paper. Further it is found that the usage of coated paper increases with catalog printing whereas it decreases with book and manual printing.

APA, Harvard, Vancouver, ISO, and other styles

4

Tehrani, Payman. "Electrochemical Switching in Conducting Polymers – Printing Paper Electronics." Doctoral thesis, Linköpings universitet, Institutionen för teknik och naturvetenskap, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-15132.

Full text

Abstract:

During the last 30 years a new research and technology field of organic electronic materials has grown thanks to a groundbreaking discovery made during the late 70’s. This new field is today a worldwide research effort focusing on exploring a new class of materials that also enable many new areas of electronics applications. The reason behind the success of organic electronics is the flexibility to develop materials with new functionalities via clever chemical design and the possibility to use low‐cost production techniques to manufacture devices. This thesis reports different aspects of electrochemical applications of organic electronics. We have shown that the color contrast in reflective and transmissive electrochromic displays can be almost doubled by adding an extra electrochromic polymer. The choice of electrochromic material was found to be limited by its electrochemical over‐oxidation (ECO) properties, which is one of the main degradation mechanisms found in displays. The irreversible and non‐conducting nature of over‐oxidized films encouraged us to use it in a novel patterning process in which polythiophene films can be patterned through local and controlled deactivation of the conductivity. ECO can be combined with various patterning tools such as screen printing for low‐cost roll‐to‐roll manufacturing or photolithography, which enables patterning of small features. Studies have shown that electronic conductivity contrasts beyond 107 can be achieved, which is enough for various simple electronic systems. To generate better understanding of the ECO phenomenon, the effect of pH on the over‐oxidation characteristics was studied. The results suggest that a part of the mechanism for over‐oxidation depends on the OH– concentration of the electrolyte used. Over‐oxidation has also been used in electrochemical loggers, where the temperature and time dependence of the propagation of an over‐oxidation front is used to monitor and record the temperature of a package.
Dagligen kommer vi i kontakt med olika plastmaterial. Dessa har vanligtvis mycket dålig elektrisk ledningsförmåga och används oftast som isolerande material. Det finns dock en klass av plaster som är halvledande eller ledande. Sedan upptäckten av dessa material för mer än 30 år sedan har nya material och användningsområden utvecklats och nu börjar de första produkterna baserad på organisk elektronik komma ut på marknaden. En stor fördel med de ledande plasterna är att egenskaperna kan anpassas genom att ändra den kemiska strukturen. Man kan dessutom lösa upp dem och skapa ledande bläck, som sedan kan användas i vanliga tryckmaskiner. Detta gör det möjligt att på ett enkelt och billigt sätt tillverka elektronik på liknande sätt som till exempel tidningar trycks idag. Den här avhandlingen behandlar en del av det nya området som berör elektrokemiska komponenter och några av dess tillämpningar. Fokus ligger främst på billig, tryckt elektronik. Bland annat presenteras ett sätt att fördubbla kontrasten för tryckta pappersdisplayer, ett nytt sätt att mönstra ledande plaster och elektrokemisk temperaturloggningsetikett som kan övervaka temperaturen för förpackningar under transport. Den mekanism som förstör ledningsförmågan vid höga spänningar har varit ett återkommande inslag i de studier som har genomförts här. Denna mekanism förstör komponenterna under drift men kan också användas för att ta bort ledningsförmågan som mönstringsmetod eller för att lagra information, permanent, i temperaturloggningsetiketten.

APA, Harvard, Vancouver, ISO, and other styles

5

Kulachenko, Artem. "Mechanics of paper webs in printing press applications." Doctoral thesis, Stockholm, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3863.

Full text

APA, Harvard, Vancouver, ISO, and other styles

6

Garcia, Daniel. "An investigation of the relationship between percentage area coverage and ink film trapping /." Online version of thesis, 1993. http://hdl.handle.net/1850/11897.

Full text

APA, Harvard, Vancouver, ISO, and other styles

7

Ho, Jimmy Jeng-Rung. "A study of how coated paper's roughness, gloss and absorptivity affect on SID and print gloss /." Online version of thesis, 1991. http://hdl.handle.net/1850/10970.

Full text

APA, Harvard, Vancouver, ISO, and other styles

8

Holland, Cort. "Building and testing a gravure paper conformity tester /." Online version of thesis, 1988. http://hdl.handle.net/1850/11536.

Full text

APA, Harvard, Vancouver, ISO, and other styles

9

Asokan, Srikumaran. "Color ink-jet printing : evaluation of print quality on different paper substrates /." Online version of thesis, 1990. http://hdl.handle.net/1850/11478.

Full text

APA, Harvard, Vancouver, ISO, and other styles

10

Clark, Aaron W. "Gloss Development of Spray-coated Systems." Fogler Library, University of Maine, 2004. http://www.library.umaine.edu/theses/pdf/ClarkAW2004.pdf.

Full text

APA, Harvard, Vancouver, ISO, and other styles

11

Wang, Dein. "An investigation of the applicability of Walker and Fetsko ink transfer equation on and the influence of ink viscosity on heat set ink used on the web offset process /." Online version of thesis, 1987. http://hdl.handle.net/1850/8839.

Full text

APA, Harvard, Vancouver, ISO, and other styles

12

Rentschler, Lisa. "A study of the effects of paper, ink and drying techniques on lithographic ink transfer during electrophotographic imprinting /." Online version of thesis, 1989. http://hdl.handle.net/1850/11379.

Full text

APA, Harvard, Vancouver, ISO, and other styles

13

Holmberg, Veronica. "Creating temperature stimulated paper muscles by printing and lamination." Thesis, Linköping University, Department of Science and Technology, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-11766.

Full text

Abstract:

A paper that shows motion when being exposed to heat has in this study been called a paper muscle. A paper muscle can be used for many different applications, e.g. smart advertisement or indicators in printed paper products. The muscles created in the present work were prepared by gluing or printing a polymer layer onto paper. The polymer layers consisted of MELINEX, MYLAR or toner, which are known to expand when exposed to heat. Furthermore, all three material systems showed bending when exposed to heat.

A mechanical bilayer model was implemented and used to quantitatively study the parameters that influence the bending of the muscles. The model indicated that the dimensional changes of the polymer layers relative to that of the copy paper was found to be approximately 0,1-0,5 % within the temperature range 23-60 °C. The experiments showed that the combined dimensional changes within the polymer and paper layers were not linear with respect to temperature, and that there was a significant difference in bending for muscles cut in the MD and in the CD. Also, when assuming that the polymer is the active component, the observed coefficient of thermal expansion was a factor ~10 greater compared to published literature data. These findings led to the conclusion that it was indeed the dimensional changes within the paper that were the dominant cause of the bending. This was confirmed by a muscle, comprising a bilayer of paper cut in the MD and the CD, which bended when exposed to heat. The results also indicate that a large part of the bending could be attributed to the hygrocontraction of paper.

APA, Harvard, Vancouver, ISO, and other styles

14

Norberg, Ole. "The importance of paper properties in digital colour printing /." Norrköping : Department of Science and Technology, Linköping University, 2006. http://www.bibl.liu.se/liupubl/disp/disp2006/tek1050s.pdf.

Full text

APA, Harvard, Vancouver, ISO, and other styles

15

Zhao, Mingxuan. "Paper Printing Circuit Based on Inductively Coupled Wireless Transmission." Thesis, Mittuniversitetet, Institutionen för elektronikkonstruktion, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-36627.

Full text

Abstract:

This report is about how to design and fabricated a wireless energy transfer system which is printed on flexible photo paper. That is a technology used to print conducting tracks on paper, or even entire circuit system. The circuit of wireless energy transmission is half bridge converter with spiral coil as the inductance which are etching in primary side and printing in secondary side.The procedure of fabrication will be introduced. While realizing the feasible simulation circuit, the optimal transmission energy system components are mounted according to the requirements. While looking for the best efficiency, it’s also neccessary to consider the appropriate size of the system. In the end of this report there will be some analysis which is aimed to identify where the largest electrical losses are located. Compared with ordinary PCB circuit board, printed circuit on paper makes the whole system very flexible and portable. When the primary side as close with secondary side, The efficiency is almost 72% while the 60Ω as the load. The output power is 10.68w. On the other hand, the ink of printed circuit on paper has high resistivity, which affects the efficiency of radio power system. However, for different paper substrates, the efficiency of wireless charging system will not be affected.

APA, Harvard, Vancouver, ISO, and other styles

16

Yasumura, Patrícia Kaji. "Caracterização de propriedades de papel para impressão por jato de tinta." Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/3/3137/tde-06062013-170116/.

Full text

Abstract:

Os novos processos de impressão têm exigido novas características do papel. Entre os novos processos encontram-se as impressões digitais, em especial, a impressão por jato de tinta. Este tipo de impressão é baseado na ejeção de uma gota de tinta por um orifício em uma cabeça de impressão, que atinge o substrato formando um pixel. A definição das imagens formadas neste tipo de impressão é, portanto, dependente das características da tinta e, principalmente, do substrato. O presente trabalho tem por objetivo caracterizar as propriedades do papel que são importantes para a impressão por jato de tinta, desde o momento em que a tinta atinge a superfície do papel até a sua absorção. As propriedades consideradas neste estudo foram: a rugosidade, a porosidade e as propriedades químicas da superfície. A rugosidade foi avaliada pelos métodos tradicionais da área de papel e celulose (baseados em vazão de ar), por método perfilométrico e, qualitativamente, por imagens obtidas por microscopia eletrônica de varredura (MEV). Para a porosidade foi utilizado um método tradicional, além de porosimetria de intrusão de mercúrio e microtomografia de raios X, e a composição química da superfície foi avaliada por espectroscopia por energia dispersiva (EDS) e espectroscopia Raman. A partir dos resultados obtidos, as propriedades do papel foram qualificadas e as suas influências no espalhamento e absorção de líquidos em geral foram identificadas. Além da caracterização das propriedades superficiais e porosimétricas do papel, as correlações entre as propriedades e os diferentes métodos utilizados na sua determinação foram discutidas. Os métodos de análise tradicional não conseguem caracterizar os papéis em níveis de resolução capazes de fornecer informações sobre a influência das propriedades estudadas na impressão por jato de tinta. Ao mesmo tempo, a caracterização do papel para este tipo de impressão e a compreensão das influências das propriedades do papel no espalhamento e absorção de tinta e líquidos em geral só é possível quando as propriedades são analisadas em conjunto.
The new printing processes have required new features of the paper. Among the new printing processes are the digital printing, in particular, the inkjet printing. This type of printing is based on the ejection of an ink drop through a hole in a print head, which reaches the substrate forming a pixel. The resolution of the images formed in this type of printing is therefore dependent on the characteristics of the ink, and especially of the substrate. The present work aims to characterize the properties of paper that are important to the inkjet printing, from the moment the ink hits the paper surface to its absorption. The properties considered in this study were: roughness, porosity and chemical properties of the surface. The roughness was evaluated by traditional methods in pulp and paper sector (based on air flow), by profilometry and qualitative using images obtained by scanning electron microscopy (SEM). For the porosity, a traditional method was used, and also mercury intrusion porosimetry and X-ray microtomography. The chemical composition of the surface was evaluated by energy dispersive spectroscopy (EDS) and Raman spectroscopy. From the results obtained, the paper properties were described and their influence on the spreading and absorption of liquids in general have been identified. Besides the characterization of the paper surface properties and porosity, the correlations between the properties and the different methods used for measurement were discussed. The traditional analysis methods can not characterize the paper in levels of resolution capable of providing information about the influence of the properties studied in inkjet printing. At the same time, to characterize paper for this printing process and to understand the influences of the paper properties on the spreading and absorption of inks and liquids in general the paper properties have to be analyzed together.

APA, Harvard, Vancouver, ISO, and other styles

17

Jeon, Sung Jai. "Mechanisms of Print Gloss Development with Controlled Coating Structure." Fogler Library, University of Maine, 2002. http://www.library.umaine.edu/theses/pdf/JeonSJ2002.pdf.

Full text

APA, Harvard, Vancouver, ISO, and other styles

18

Ercan, Saybil Nuray. "The influence of process parameters on filament size distribution." Fogler Library, University of Maine, 2001. http://www.library.umaine.edu/theses/pdf/ErcanSN2001.pdf.

Full text

APA, Harvard, Vancouver, ISO, and other styles

19

Voltaire, Joakim. "Ink film splitting acoustics and tack on paper in offset printing." Licentiate thesis, KTH, Chemistry, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-1792.

Full text

Abstract:

This licentiate thesis comprises two complementary studiesdealing with the sheet-fed offset printing of paper. The firststudy addresses the further development of a practical methodto acoustically monitor and analyse the film splitting ofoffset inks. This method was tested on laboratory printingequipment, specifically monitoring the continuous ink splittingin the nip of an IGT ink distribution unit and the short-timeink splitting in the inked print disc-paper nip of the printingunit of an ISIT instrument. The study verified that the inksplitting component of the acoustic signal contributes to thehigher frequency range (10-20 kHz) of the audible spectrum, andcan thus be separated from the lower frequency machine noise.Furthermore, the film splitting component is sensitive tochanges in the ink and printing conditions, thus enabling itsuse in probing the fundamental mechanisms occurring during inktransfer and also suggesting its applicability fornon-intrusive monitoring of industrial printing presses. Anincrease in film thickness during ink distribution correspondsto an increased acoustic power, with the exception of very lowink amounts, which give reduced acoustic emission due to alubricating effect. The effect of the presence of fountainsolution was simulated by adding emulsion-forming, butnon-evaporative, ethylene glycol. This produces an increase inacoustic power at low amounts, due to resistance to glycol dropdeformation, followed by a decrease at higher amounts owing toexcess glycol lining the rolls. During test printing on paper,increasing ink amounts also display an increased acousticresponse.

The second study further developed a theoretical model toexplain and predict the evolution of ink tack in terms of inksetting directly after offset printing on coated paper. Asmeasured by the ISIT, the tack of the printed ink rises duringshorter time periods, attains a maximum, and then falls atlonger times. The proposed model described how the ink tack,characterised by the impulse during disc pull-off, dependsdynamically on the viscoelastic properties of the ink, thecontact with paper and disc, and the flow geometry. The inksetting was modelled as a diffusion-limited transport of theoil vehicle through the ink film and into the pores of thecoated paper. The coupling of the tack and setting models,compared to the ISIT experimental measurements, then provided adiffusion coeffcient for ink setting during the tack riseperiod. This coeffcient decreases with time, and increasinglyrapidly with decreasing ink amounts due to theconcentration-dependent diffusion. For an accurate descriptionthe elasticity and adhesion effects also have to be considered,at least for explaining the tack fall period.

APA, Harvard, Vancouver, ISO, and other styles

20

Lundberg, Anna. "Ink-paper interactions and effect on print quality in inkjet printing." Licentiate thesis, Mittuniversitetet, Institutionen för informationsteknologi och medier, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-13373.

Full text

Abstract:

This thesis concerns paper and ink interactions related to inkjet printing. The main purpose of this work was to gain a deeper understanding in which parameters control the flow of ink into papers and how the ink interacts with the paper surface. The overall objective was to find key parameters to optimize the print quality in inkjet printing. Characterization of paper-surfaces in terms of porosity, surface roughness and surface energy was made. Objective and subjective measurements were used for print quality evaluation. Light microscopy imaging and SEM was used to see how ink interacts with the paper surface in a printed image. A high speed camera was used to study the absorption of picolitre sized inkjet droplets into fine papers. An initial study on the effect of paper properties on print quality was made. Result indicated that there were small differences in print quality for pilot papers with different composition (in a specific parameter window) and the commercial paper COLORLOK® reproduced a noticeable high colour gamut compared to the other samples.Research was made to see how surface fixation can affect the print quality for printouts made with pigmented ink. Surface fixation promotes retention of the pigmented colorant in the outermost surface layer of the paper and has been denoted “colorant fixation” in this thesis. It was shown that applying colorant fixation onto a paper surface before printing can increase the detail reproduction in a printed image. Different concentrations of calcium chloride were applied onto the paper surface on fullscale produced non-commercial papers. Test printing was made with a SoHo (Small office/Home office) printer using pigmented ink and results showed that using calcium chloride as surface treatment can lead to aggregation of pigments at the surface resulting in a higher detail reproduction. Fast absorption of the carrier liquid into the paper and fast fixation of colourants on the surface is important in inkjet printing to avoid colour to colour bleeding. These demands will be more pronounced when the printing speed increases. It is important to understand which parameters affect the absorption process to be able to control the mechanisms and to optimize the print quality. A study of absorption of picolitre size inkjet droplets into fine paper was made in this work. Theoretical equations describing fluid absorption into capillaries were tested and compared with experimental results. The result showed that the time dependence in the Lucas-Washburn (L-W) equation fits fairly well to data whereas the L-W equation overestimates the penetration depth. The results are directly applicable to paper and printing industry and can be used as a base for future studies of absorption of picolitre sized droplets into porous materials and for studies of aggregation of colloidal particles on surfaces.
Presentationen hölls den 2011-02-25
Next generation substrates for inkjet printing

APA, Harvard, Vancouver, ISO, and other styles

21

Hansuebsai, A. "An investigation of the optical profile properties (smoothness) of paper substrates including the effects on smoothness of solvent penetratation and with particular reference to lithographic." Thesis, University of the Arts London, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.234271.

Full text

APA, Harvard, Vancouver, ISO, and other styles

22

El, Baradai Oussama. "Elaboration of flexible lithium - ion electrodes by printing process." Thesis, Grenoble, 2014. http://www.theses.fr/2014GRENI036/document.

Full text

Abstract:

Le travail présenté dans ce mémoire concerne la réalisation des batteries souples lithium-ion. Il a comme objectif le développement de nouveaux procédés comme l'impression par sérigraphie pour la fabrication de batteries et le remplacement des polymères issus de la chimie de synthèse par des matériaux bio-sourcés utilisables en milieu aqueux. Les résultats obtenus ont montré qu'il est possible de formuler des encres aqueuses à base des matériaux actifs classiquement utilisés pour l'élaboration d'électrodes (anode et cathode) de batterie Li-ion mais avec des liants dérivés de cellulose en substitution du PVDF qui intègre les formulations standards. Cette encre, dont les propriétés rhéologiques sont compatibles avec le procédé d'impression sérigraphique, permet l'obtention d'électrodes présentant des propriétés spécifiques aux bons fonctionnements de la batterie. Les résultats obtenus ont montré que cette technique d'impression du séparateur pouvait être utilisée pour remplacer la technique de déposition classique des matières actives sur les collecteurs de courant, basée sur un procédé d'enduction à lame (blade coating). Enfin, une batterie lithium-ion imprimée a pu être élaborée en utilisant la stratégie d'impression recto/verso du séparateur avec l'intégration des collecteurs de courant pendant la phase d'impression, validant ainsi cette nouvelle technique d'assemblage
The work presented in this manuscript describes the manufacturing of lithium-ion batteries on papers substrates by printing technique. Its aim is the development of new up scalable and large area techniques as screen printing for the fabrication of lithium-ion batteries and the replacement of conventional toxic components by bio-sourced one and water based solvent. First results shows how it is possible to formulate cellulose based ink tailored for screen printing technology with suitable properties for lithium-ion batteries requirements. Electrodes were manufactured and tested from a physical and electrochemical point of view and two strategies were proposed to enhance performances. Finally, by considering results obtained for the electrodes, a full cell was manufactured with a new assembling strategy based on: front / reverse printing approach and the embedding of the current collectors during printing stage. As a final point cells were characterized and compared with others obtained by conventional assembling strategies

APA, Harvard, Vancouver, ISO, and other styles

23

Klem, Maykel dos Santos [UNESP]. "Estudo de supercapacitores orgânicos impressos em papel à base de PEDOT:PSS." Universidade Estadual Paulista (UNESP), 2017. http://hdl.handle.net/11449/152154.

Full text

Abstract:

Submitted by Maykel dos Santos Klem null (maykel_klem@hotmail.com) on 2017-11-16T05:32:41Z No. of bitstreams: 1 Dissertação_mestrado_Maykel.pdf: 4072759 bytes, checksum: 49804b0b4c75b954b2c9c7e4aa93265e (MD5)
Submitted by Maykel dos Santos Klem null (maykel_klem@hotmail.com) on 2017-11-22T14:06:59Z No. of bitstreams: 1 Dissertação_mestrado_Maykel.pdf: 4072759 bytes, checksum: 49804b0b4c75b954b2c9c7e4aa93265e (MD5)
Submitted by Maykel dos Santos Klem null (maykel_klem@hotmail.com) on 2017-11-22T18:09:14Z No. of bitstreams: 1 Dissertação_mestrado_Maykel.pdf: 4072759 bytes, checksum: 49804b0b4c75b954b2c9c7e4aa93265e (MD5)
Submitted by Maykel dos Santos Klem null (maykel_klem@hotmail.com) on 2017-11-22T18:12:24Z No. of bitstreams: 1 Dissertação_mestrado_Maykel.pdf: 4072759 bytes, checksum: 49804b0b4c75b954b2c9c7e4aa93265e (MD5)
Submitted by Maykel dos Santos Klem null (maykel_klem@hotmail.com) on 2017-11-22T19:44:22Z No. of bitstreams: 1 Dissertação_mestrado_Maykel.pdf: 4072759 bytes, checksum: 49804b0b4c75b954b2c9c7e4aa93265e (MD5)
Submitted by Maykel dos Santos Klem null (maykel_klem@hotmail.com) on 2017-11-23T11:57:14Z No. of bitstreams: 1 Dissertação_mestrado_Maykel.pdf: 4072759 bytes, checksum: 49804b0b4c75b954b2c9c7e4aa93265e (MD5)
Submitted by Maykel dos Santos Klem null (maykel_klem@hotmail.com) on 2017-11-23T12:57:55Z No. of bitstreams: 1 Dissertação_mestrado_Maykel.pdf: 4072759 bytes, checksum: 49804b0b4c75b954b2c9c7e4aa93265e (MD5)
Submitted by Maykel dos Santos Klem null (maykel_klem@hotmail.com) on 2017-11-23T13:16:31Z No. of bitstreams: 1 Dissertação_mestrado_Maykel.pdf: 4072759 bytes, checksum: 49804b0b4c75b954b2c9c7e4aa93265e (MD5)
Submitted by Maykel dos Santos Klem null (maykel_klem@hotmail.com) on 2017-11-23T13:34:44Z No. of bitstreams: 1 Dissertação_mestrado_Maykel.pdf: 4072759 bytes, checksum: 49804b0b4c75b954b2c9c7e4aa93265e (MD5)
Submitted by Maykel dos Santos Klem null (maykel_klem@hotmail.com) on 2017-11-23T17:24:54Z No. of bitstreams: 1 Dissertação_mestrado_Maykel.pdf: 4072759 bytes, checksum: 49804b0b4c75b954b2c9c7e4aa93265e (MD5)
Submitted by Maykel dos Santos Klem null (maykel_klem@hotmail.com) on 2017-11-23T17:29:01Z No. of bitstreams: 1 Dissertação_mestrado_Maykel.pdf: 4072759 bytes, checksum: 49804b0b4c75b954b2c9c7e4aa93265e (MD5)
Submitted by Maykel dos Santos Klem null (maykel_klem@hotmail.com) on 2017-11-24T12:05:23Z No. of bitstreams: 1 Dissertação_mestrado_Maykel.pdf: 4072759 bytes, checksum: 49804b0b4c75b954b2c9c7e4aa93265e (MD5)
Submitted by Maykel dos Santos Klem null (maykel_klem@hotmail.com) on 2017-11-24T12:39:43Z No. of bitstreams: 1 Dissertação_mestrado_Maykel.pdf: 4072759 bytes, checksum: 49804b0b4c75b954b2c9c7e4aa93265e (MD5)
Submitted by Maykel dos Santos Klem null (maykel_klem@hotmail.com) on 2017-11-24T16:47:37Z No. of bitstreams: 1 Dissertação_mestrado_Maykel.pdf: 4072759 bytes, checksum: 49804b0b4c75b954b2c9c7e4aa93265e (MD5)
Submitted by Maykel dos Santos Klem null (maykel_klem@hotmail.com) on 2017-11-24T17:31:22Z No. of bitstreams: 1 Dissertação_mestrado_Maykel.pdf: 4072759 bytes, checksum: 49804b0b4c75b954b2c9c7e4aa93265e (MD5)
Submitted by Maykel dos Santos Klem null (maykel_klem@hotmail.com) on 2017-11-27T11:40:50Z No. of bitstreams: 1 Dissertação_mestrado_Maykel.pdf: 4072759 bytes, checksum: 49804b0b4c75b954b2c9c7e4aa93265e (MD5)
Submitted by Maykel dos Santos Klem null (maykel_klem@hotmail.com) on 2017-11-27T12:31:51Z No. of bitstreams: 1 Dissertação_mestrado_Maykel.pdf: 4072759 bytes, checksum: 49804b0b4c75b954b2c9c7e4aa93265e (MD5)
Submitted by Maykel dos Santos Klem null (maykel_klem@hotmail.com) on 2017-11-27T13:03:15Z No. of bitstreams: 1 Dissertação_mestrado_Maykel.pdf: 4072759 bytes, checksum: 49804b0b4c75b954b2c9c7e4aa93265e (MD5)
Submitted by Maykel dos Santos Klem null (maykel_klem@hotmail.com) on 2017-11-27T18:08:07Z No. of bitstreams: 1 Dissertação_mestrado_Maykel.pdf: 4072759 bytes, checksum: 49804b0b4c75b954b2c9c7e4aa93265e (MD5)
Submitted by Maykel dos Santos Klem null (maykel_klem@hotmail.com) on 2017-11-28T12:13:07Z No. of bitstreams: 1 Dissertação_mestrado_Maykel.pdf: 4072759 bytes, checksum: 49804b0b4c75b954b2c9c7e4aa93265e (MD5)
Submitted by Maykel dos Santos Klem null (maykel_klem@hotmail.com) on 2017-11-28T14:22:46Z No. of bitstreams: 1 Dissertação_mestrado_Maykel.pdf: 4072759 bytes, checksum: 49804b0b4c75b954b2c9c7e4aa93265e (MD5)
Submitted by Maykel dos Santos Klem null (maykel_klem@hotmail.com) on 2017-11-28T14:31:56Z No. of bitstreams: 1 Dissertação_mestrado_Maykel.pdf: 4072759 bytes, checksum: 49804b0b4c75b954b2c9c7e4aa93265e (MD5)
Submitted by Maykel dos Santos Klem null (maykel_klem@hotmail.com) on 2017-11-28T14:37:45Z No. of bitstreams: 1 Dissertação_mestrado_Maykel.pdf: 4072759 bytes, checksum: 49804b0b4c75b954b2c9c7e4aa93265e (MD5)
Approved for entry into archive by Minervina Teixeira Lopes null (vina_lopes@bauru.unesp.br) on 2017-11-28T15:54:43Z (GMT) No. of bitstreams: 1 klem_ms_me_bauru.pdf: 4012228 bytes, checksum: f1af56b8b0b9f5e19934e197b4755874 (MD5)
Made available in DSpace on 2017-11-28T15:54:43Z (GMT). No. of bitstreams: 1 klem_ms_me_bauru.pdf: 4012228 bytes, checksum: f1af56b8b0b9f5e19934e197b4755874 (MD5) Previous issue date: 2017-09-27
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
Realizou-se primeiramente neste trabalho o estudo de um supercapacitor padrão utilizando coletores de aço inox e eletrodos de grafite Aquadag®. Este dispositivo apresentou uma capacitância máxima de 22 F/g, e seu espectro de impedância foi modelado por um circuito do tipo R(C(RW))(RC)(RC). Com este dispositivo foi possível testar os métodos de produção dos supercapacitores, e identificar as características desejáveis no supercapacitor impresso. Foram testadas duas técnicas de impressão distintas visando o preparo de eletrodos e coletores de corrente impressos em papel para aplicação em supercapacitores. O material ativo utilizado nos eletrodos foi basicamente o PEDOT:PSS, com a adição de óxido de grafeno, grafite aquadag® e nanotubos de carbono de paredes múltiplas (MWNT) para a formação compósitos condutores. Foram realizadas caracterizações morfológicas e elétricas nas superfícies dos eletrodos impressos em papel filtro, vegetal e sulfite. Os eletrodos produzidos por serigrafia utilizando o compósito de PEDOT:PSS com MWNT impressos em papel filtro apresentaram os menores resultados de resistência de folha (17 Ω/sqr), sendo assim utilizados na produção dos supercapacitores. O supercapacitor impresso em papel apresentou um bom comportamento capacitivo através de medidas de espectroscopia de impedância e voltametria cíclica. A curva de impedância foi modelada através de um circuito do tipo R(RC)(C(RQ))(RC), evidenciando uma alta capacitância de dupla camada. Foi encontrada uma capacitância específica máxima de 20,3 F/g.para uma corrente de carga/descarga de 1 mA, e uma resistência equivalente em série de 60 Ω. Estes valores levaram a densidades de energia e potência de 3,1 Wh/kg e 420 W/kg, respectivamente. Realizaram-se também simulações e ajustes a partir das análises em corrente contínua, usando um circuito equivalente RC paralelo com uma resistência em série. Através destes ajustes foi possível extrair parâmetros de grande importância na utilização prática dos supercapacitores.
In this study, we first produced a standard supercapacitor using stainless steel collectors and Aquadag® graphite electrodes. The device exhibited a maximum capacitance of 22 F/g, and an R(C(RW))(RC)(RC) circuit modeled its impedance spectrum. With this device was possible to test the production methods of supercapacitors, and identify its desirable characteristics. Two different printing techniques were tested to produce electrodes/current collectors. The active material used in the electrodes was PEDOT: PSS, with addition of graphene oxide, Aquadag® graphite and multi-walled carbon nanotubes (MWNT), in order to obtain conductive composites. Morphological and electrical characterizations were performed over the surfaces of printed electrodes onto filter, vegetable and bond paper. The electrode produced by screen-printing using the PEDOT: PSS/MWNT composite printed onto filter paper exhibited low sheet resistance (17 Ω /sqr), being used in the production of supercapacitors. Printed supercapacitor showed good capacitive behavior through impedance spectroscopy and cyclic voltammetry measurements. An R(RC)(C(RQ)(RC) circuit modeled the impedance spectrum, evidencing a high double layer capacitance. A maximum specific capacitance of 20.3 F / g was found for a charge/discharge current of 1 mA, and an equivalent series resistance of 60 Ω. These values led to energy and power densities of 3.1 Wh / kg and 420 W / kg, respectively. Simulations and curve fitting were also performed from DC analyzes, using a parallel RC circuit coupled with a series resistance, obtaining important parameters for the practical use of supercapacitors.
FAPESP: 2015/18091-8

APA, Harvard, Vancouver, ISO, and other styles

24

Strömberg, Malin. "Paper dimensional stability in sheet-fed offset printing : Papperets dimensionsstabilitet i en arkoffsetpress." Thesis, Högskolan Dalarna, Grafisk teknik, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:du-1400.

Full text

Abstract:

In offset printing, dampening solution is used to create a good balance in the process. If too much water is transferred to the paper, the sheet can change its size between the printing units, due to water absorption, and cause a problem with the colour register. This phenomenon is usually referred to as fanout. In this degree project, an investigation was made to see if the paper dimensions changed through its way in the sheet-fed printing process. The instrument Luchs Register Measuring Systems (Lynx) was used, and a method for measuring if the paper changed its dimensions with this instrument, was developed. Paper qualities with three different grammages were used, 90, 130 and 250 gsm. This investigation showed that all paper qualities changed their size with widening in the gripper edge in the range of 10 - 70 µm and in the trailing edge the increase was 10 - 130 µm. The elongations of the papers were in the range of 10- 300 µm. The papers with lowest grammage changed more than the heavier. To see if the print had been affected of the widening and elongation, print quality parameters like relative contrast, dot gain and mottle were correlated with the Lynx data from the sheets. The group of papers that gave correlations were in 130 gsm. The sheets had visual doubling and the combined standard deviation from the Lynx marks K3, K5 and K21 correlated with dot gain. When the variations increased so did the dot gain and this indicates that the doubling was due to the widening. There was also a correlation between the standard deviation from K3 and Mottle. The sheets widened with an average of 30 µm in the gripper edge and since there probably were doubling due to widening it also affected the Mottle values. What the widening depends on is hard to tell. Since widening was so small, it could be due to water absorption, papers being ironed out or maybe the sheets have been flattened out. It probably needs a more detailed investigation to find out what causes the widening. Further investigations about how print quality is affected by the register accuracy of a printing machine should include a print form with measuring areas close to the Lynx marks. The measuring areas should contain fine hairlines, negative text printed with at least two colours and some pictures to evaluate together with standard measuring should give a good knowledge about the subject.

APA, Harvard, Vancouver, ISO, and other styles

25

Kettle, John. "Investigation and computer modelling of the pore structure of paper and of consolidated pigment coatings." Thesis, University of Plymouth, 1996. http://hdl.handle.net/10026.1/2470.

Full text

Abstract:

The aim of this project was to enhance the current state of knowledge of the void structure of paper, and pigments used to coat paper. The porosities and pore size distributions of consolidated pigments were measured using mercury porosimetry. Prior to this work, mercury porosimetry was rarely used in this field due to problems associated with the conventional interpretation of mercury porosimetry data. These problems were examined and two limitations of mercury porosimetry were addressed. Firstly, the shrinkage of compressible samples causes an apparent increase in void volume and secondly, large void spaces shielded by smaller ones are not intruded until anomalously high applied pressures of mercury are reached. The first limitation was overcome by means of a new correction procedure which, uniquely, also allows the measurement of the bulk modulus of the continuous solid phase of a porous sample. Shielding effects have been taken into account by means of a software package known as Pore-Cor, which generates a three dimensional structure which has both a mercury intrusion curve and porosity in close agreement with experiment. It has also been possible to calculate the permeabilities and tortuosity of the simulated structure and this provides realistic and useful values, which may not be measured experimentally. Mercury porosimetry and a range of specialised absorption techniques, including liquid porosimetry, were used to characterise the porous structures of a highly filled paper which had been calendered using a range of different conditions. A unique feature of this work is that for the first time it has been shown that two porosimetric techniques which measure overlapping pore size distributions may be combined to give a better indication of the total pore size distribution.

APA, Harvard, Vancouver, ISO, and other styles

26

Ajersch, Michael. "Mechanisms of pulp loss in flotation deinking /." *McMaster only, 1997.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

27

Shakourian, Gelareh. "Enhanced De-inking and Recyclability of Laser Printed Paper by Plasma-Assisted Fiber Coating." Thesis, Georgia Institute of Technology, 2006. http://hdl.handle.net/1853/10572.

Full text

Abstract:

Office waste paper is one of the fastest growing segments of the recycled fiber industry. Toner particles are rigid, insoluble and difficult to disperse and detach from fibers. Therefore papers made from recycled office waste having high toner content will contain noticeable ink particles. This work will consider an alternative way of efficient de-inking using plasma polymers which will not affect the fibers chemically or mechanically. The focus is development and characterization of plasma-deposited films to serve as a barrier film for the adhesion of ink toner to the paper fibers and thereby enhance ink lift off from the fibers. The plasma treated paper is coated with fluorocarbon (PFE) and polyethylene glycol (PFE) films, with constant thickness of PFE and varying the thickness of PEG by 1500, from 1500 to 4500, for the three cases studied (PFE greater than PEG, PFE=PEG, PFE less than PEG). Handsheets were made using virgin fibers to eliminate effects of fillers. Once the sheets were coated and printing performed, they were re-pulped and both the slurry and the de-inking surfactant were placed in a flotation cell. Handsheets were made from the collected foam and stock and were scanned for particle count. The results indicated higher ink loss for the cases with increased thickness of polymer films. A handsheet with a 7500 film (PFE = 3000 and PEG = 4500) showed 61% ink removal compared to 38% for handsheets with no film deposited. There was also less material loss for the cases with higher polymer film thickness.

APA, Harvard, Vancouver, ISO, and other styles

28

Olsson, Robert. "Some aspects on flexographic ink-paper and paperboard coating interaction." Doctoral thesis, Karlstad : Faculty of Technology and Science, Chemical Engineering, Karlstad University, 2007. http://www.diva-portal.org/kau/abstract.xsql?dbid=1218.

Full text

APA, Harvard, Vancouver, ISO, and other styles

29

Manwiller, Christine Marie. "Investigations into botanical contact printing (where the light meets the trees; thirteen variations)." Thesis, University of Iowa, 2018. https://ir.uiowa.edu/etd/6194.

Full text

Abstract:

Investigations in Botanical Contact Printing (Where the Light Meets the Trees; Thirteen Variations) explores the process of botanical contact printing on paper, culminating in a series of thirteen handmade artist books. Each of the thirteen books contains a poem from a collection of thirteen poems written by Alice Yousef. Every element of the book: materials, structure, calligraphed text, type of botanical contact print, sometimes the enclosure, responds to the poem, providing a visual interpretation of the written word. The completely different approaches to binding structure in this series intend to not only visually support the text, but also explore the possibilities of botanical contact print imagery in the book form.

APA, Harvard, Vancouver, ISO, and other styles

30

Maher, Kimberly A. "Two lives." Thesis, University of Iowa, 2014. https://ir.uiowa.edu/etd/1358.

Full text

APA, Harvard, Vancouver, ISO, and other styles

31

Öhlund, Thomas. "Coated Surfaces for Inkjet-Printed Conductors." Licentiate thesis, Mittuniversitetet, Institutionen för tillämpad naturvetenskap och design, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-16449.

Full text

Abstract:

In this thesis, a number of commercially available paper substrates of various types are characterized and their characteristics related to the performance of inkjet-printed conductors using silver nanoparticle ink. The evaluated performance variables are electrical conductivity as well as the minimum achievable conductor width and the edge raggedness. It is shown that quick absorption of the ink carrier is beneficial for achieving well defined conductor geometry and high conductivity. Surface roughness with topography variations of sufficiently large amplitude and frequency is detrimental to print definition and conductivity. Porosity is another important factor, where the characteristic pore size is much more important than the total pore volume. A nearly ideal porous coating has large total pore volume but small characteristic pore size, preferably smaller than individual nanoparticles in the ink. Apparent surface energy is important for non-absorbing substrates but of limited importance for coatings with a high absorption rate.Additionally, a concept for improving the geometric definition of inkjet-printed conductors on nonporous films has been demonstrated. By coating the films with polymer–based coatings to provide a means of ink solvent removal, minimum conductor width were reduced a factor 2 or more.Intimately connected to the end performance of printed conductors is a well adapted sintering methodology. A comparative evaluation of a number of selective sintering methods has been performed on paper substrates with different heat tolerance. Pulsed high-power white light was found to be a good compromise between conductivity performance, reliability and production adaptability.The purpose of the work conducted in this thesis is to increase the knowledge base in how surface characteristics of papers and flexible films affect performance of printed nanoparticle structures. This would improve selection, adaption of, or manufacturing of such substrates to suit printed high conductivity patterns such as printed antennas for packaging.
I denna avhandling har ett antal kommersiellt tillgängliga papper av olika typ karaktäriserats och deras egenskaper relaterats till prestandan på inkjet-tryckta elektriska ledare tryckta med silvernanopartikelbläck. De undersökta prestandavariablerna är elektrisk ledningsförmåga samt ledarnas minimala linjebredd och kantjämnhet. Det visas att en snabb absorption av bläckets lösningsmedel är gynnsam för både väldefinierad ledningsgeometri och elektrisk ledningsförmåga. Ytråhet med topografiska variationer med tillräckligt stor amplitud och spatiell frekvens korrelerar negativt med tryckdefinition och ledningsförmåga. Porositet är ytterligare en viktig faktor, där karaktäristisk porstorlek är avsevärt viktigare än total porvolym. Nära ideala egenskaper hos en porös bestrykning synes vara en mycket hög total porvolym men med små individuella porer, med fördel mindre än de minsta metallpartiklarna i bläcket. Ytenergi är mycket betydelsefull för icke-absorberande substrat men tappar nästan all sin betydelse för bestrykningar med snabb absorption.Ett koncept för att förbättra den geometriska definitionen på inkjet-tryckta ledare på icke-porösa flexibla filmer har visats. Genom att bestryka filmerna med vissa polymerbaserade material och därmed införa en mekanism för separering av lösningsmedel och partiklar så reducerades ledarnas minimibredd med en faktor 2 eller mer.Intimt förknippad med den slutliga elektriska prestandan på tryckta ledare är också en väl anpassad sintringsmetodik. En jämförande utvärdering av ett flertal selektiva sintringmetoder har genomförts på papper med olika värmetålighet. Pulsat vitt ljus med hög effekt bedömdes som en bra kompromiss mellan elektriska prestanda, tillförlitlighet och anpassningsbarhet för produktionsmiljö.Nyttan med arbetet som presenteras i denna avhandling är att öka kunskapsbasen för hur pappers och flexibla filmers ytegenskaper påverkar prestandan på inkjet-tryckta nanopartikelstrukturer. Detta möjliggör bättre urval, anpassning av, eller tillverkning av sådana substrat för att passa tryckta mönster med hög konduktivitet; som till exempel tryckta antenner på förpackningar.

APA, Harvard, Vancouver, ISO, and other styles

32

Rehberger, Marcus. "Hybrid printing on fibre-based packaging : Performance, Quality and Market." Doctoral thesis, KTH, Medieteknik och grafisk produktion, Media, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-27022.

Full text

Abstract:

Variable data will play a decisive role in the future of packaging and product promotion. Variable data printing (VDP) is a technique whereby certain information can be altered in an otherwise static layout with the help of a digital printing system, and in the packaging industry a wide range of applications is possible. Inkjet printing, due to its non-impact printing (NIP) principle, is the most suitable technology to use when applying variable data on packaging and to offer customized and even personalized prints for the industry and the end-consumer (van Daele, 2005). The aim of the work described in this thesis was to evaluate the practicability of attaining high quality variable data print (VDP) at high speed. The thesis is divided into three major parts. Part one focussed on the surface topography of corrugated board and applicable analytical methods to describe the printability of the substrate. In the second part the performance of inkjet on corrugated board liners printed at high speed was investigated and how to achieve maximum printing resolution. The final part of the thesis is devoted to a market survey of variable data printing on the North American and European markets. Part 1 concentrated on corrugated board as substrate and its pre-conditions regarding surface topography before the printing operation. Most critical for the quality are print defects such as mottling, gloss and stripiness, all of which occur in the printing of corrugated board. Stripiness is especially critical because it is one of the most disturbing print defects on corrugated board since it is periodical and more easily perceived than random print defects (Netz, 1996). Part 1 revealed that there is a difference in surface micro-roughness between the regions on the peak line of the fluting and the regions in the valley between two peaks of the corrugation which leads to glossy lines on the peak areas. The aim of the second part was to assess the practicability of attaining high quality VDP at high speed on a variety of liners for corrugated board production. The trial was conducted on a Kodak Versamark DP5240 press in Örnsköldsvik, Sweden, in cooperation with the Mid-Sweden University - Digital Printing Centre (DPC). Nine different substrates were printed at speeds between 0.5 and 5 m/s. The results revealed that the paper type rather than the printing speed has the greatest influence on the print quality. Speed, however, is the most important technical factor for inline implementation of inkjet. To obtain a picture of the industries’ view of variable data print on fibre-based packaging, a market survey was initiated and was addressed to people in the development, marketing and decision-making sectors of the packaging and printing industry, including manufacturers of machinery, producers of packaging and prints, and print buyers. The goal was to draw an overview map covering the people’s view of their market, trends in their fields and how they envision the future of VDP on fibre-based packaging. The conclusion was that inkjet technology has to prove itself first and to increase its technical capability, and the printing industry will then start investing more in this technology and in applications such as VDP.
QC 20101206

APA, Harvard, Vancouver, ISO, and other styles

33

Shemi, Akpojotor. "Flexographic deinking with electric field technology by destabilization and flotation." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/24666.

Full text

Abstract:

Thesis (Ph.D.)--Chemical Engineering, Georgia Institute of Technology, 2009.
Committee Chair: Hsieh, Jeffery; Committee Member: Breedveld, Victor; Committee Member: Empie, Jeff; Committee Member: Forney, Larry; Committee Member: Singh, Preet

APA, Harvard, Vancouver, ISO, and other styles

34

Hart, Anthony. "Bioregional development : an analysis of the environmental implications of local 'closed loop' uncoated woodfree printing and writing paper recycling." Thesis, University of Surrey, 2004. http://epubs.surrey.ac.uk/843956/.

Full text

Abstract:

The main objective of this research was to assess the potential environmental benefits of the 'Local Paper for London' (LPfL) cycle. A key challenge was to improve the efficiency of uncoated woodfree printing and writing (uwf P+W) paper recycling from London's commercial sector. This is achieved by 'closed-loop' recycling, whereby commercial consumers direct their waste paper back through a defined cycle to the recycled paper production facility from where they procure their 100% recycled uwf P+W paper. Life cycle assessment was used to define and compare the environmental burdens of the LPfL cycle with those of conventional supply strategies for uwf P+W papers available to consumers in the UK. Previous LCA studies into waste paper recycling show that key environmental burdens are associated with energy generation, sludge disposal and transportation in the waste paper collection and finished product delivery phases. Improvement strategies are developed to address these issues in the LPfL cycle. The results point to the development of a city-scale PAPER-Materials and Energy Recovery Facility (PAPER-MERF). At such a plant, based near the recycled paper production site, waste paper can be separated into recoverable fibre suitable for uwf P+W paper reproduction and a fibre-based recoverable energy stock; thus, in theory, the cycle has the potential to be completely powered by renewable energy. Some of the fibre sludge generated in the pulping process is also used to generate energy. Fibre sludge can also be used on or off-site for a fibreboard co-product stream. Burdens associated with transportation of finished paper are vastly reduced since the target consumers are local and, potentially, the finished goods delivery phase can be integrated with the waste paper collection cycle. The research also considers non-environmental impacts, whereby regional waste paper availability and the fibre sustainability of the LPfL product are both proven to be viable.

APA, Harvard, Vancouver, ISO, and other styles

35

Andersson, Anna, and Klara Eklund. "A Study of Oriented Mottle in Halftone Print." Thesis, Linköping University, Department of Science and Technology, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-9233.

Full text

Abstract:

Coated solid bleached board belongs to the top-segment of paperboards. One important property of paperboard is the printability. In this diploma work a specific print defect, oriented mottle, has been studied in association with Iggesund Paperboard. The objectives of the work were to develop a method for analysis of the dark and light areas of oriented mottle, to analyse these areas, and to clarify the effect from the print, coating and paperboard surface related factors. This would clarify the origin of oriented mottle and predict oriented mottle on unprinted paperboard. The objectives were fulfilled by analysing the areas between the dark halftone dots, the amount of coating and the ink penetration, the micro roughness and the topography. The analysis of the areas between the dark halftone dots was performed on several samples and the results were compared regarding different properties. The other methods were only applied on a limited selection of samples. The results from the study showed that the intensity differences between the dark halftone dots were enhanced in the dark areas, the coating amount was lower in the dark areas and the ink did not penetrate into the paperboard. The other results showed that areas with high transmission corresponded to dark areas, smoother micro roughness, lower coating amount and high topography. A combination of the information from these properties might be used to predict oriented mottle. The oriented mottle is probably an optical phenomenon in half tone prints, and originates from variations in the coating and other paperboard properties.

APA, Harvard, Vancouver, ISO, and other styles

36

Capp, Laura. "Poetry by post." Thesis, University of Iowa, 2013. https://ir.uiowa.edu/etd/4951.

Full text

Abstract:

Poetry by Post is a four-month poetry subscription service that will run from November of 2013 to February of 2014. I will produce one mailing per month that will include a letterpress-printed broadside that features a poem of my choosing and an accompanying literary analysis and reply postcard, also letterpress-printed, all contained within calligraphed envelopes and posted with vintage stamps. Subscriptions are available at $150 for the series or $50 for an individual mailing and will not exceed 50 in number. The inaugural Poetry by Post will feature Midwestern poets Jennie Kinneberg Wrisley, Eric McHenry, Catherine Tufariello, and Ted Kooser. I have taken "Midwestern" to mean anyone who has simply spent a good bit of time in the large swath of land in the middle of the U.S. And much like the Midwest, the poetry featured will be plainspoken but no less profound for that.

APA, Harvard, Vancouver, ISO, and other styles

37

Бубон, А. В. "Папір багаторазового використання." Thesis, Сумський державний університет, 2015. http://essuir.sumdu.edu.ua/handle/123456789/44034.

Full text

Abstract:

Папір є незамінним атрибутом всіх аспектів нашого життя. Саме це викликало проблеми з навколишнім середовищем, такі, як: вирубка лісів, забруднення повітря, води та землі. Усвідомивши проблему, вчені вирішили оптимізувати процес друку і розробили вражаючі технології.

APA, Harvard, Vancouver, ISO, and other styles

38

Rida, Amin H. "Conductive inkjet printed antennas on flexible low-cost paper-based substrates for RFID and WSN applications." Thesis, Atlanta, Ga. : Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/28083.

Full text

Abstract:

Thesis (M. S.)--Electrical and Computer Engineering, Georgia Institute of Technology, 2009.
Committee Chair: Dr. Manos Tentzeris; Committee Member: Dr. Gregory Durgin; Committee Member: Dr. Joy Laskar.

APA, Harvard, Vancouver, ISO, and other styles

39

Ragnarsson, Micael. "Variations Related to Print Mottle in Starch-Containing Paper Coatings." Doctoral thesis, Karlstads universitet, Avdelningen för kemiteknik, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-14409.

Full text

Abstract:

Starch in paper coatings is known to increase the risk of print mottle in lithographic offset printing. The objective of this study was to increase the understanding of this behaviour. Four phenomena that could lead to print mottle, where the presence of starch might be important, have been identified: uneven binder migration, uneven coating mass distribution, uneven deformation during calendering and differential shrinkage. The latter three were investigated in this project. Starch-containing coating colours often have high water retention. A relationship between the water retention of the coating colours and the distribution of coating thickness was found in a pilot trial. A theory is proposed, where the surface profile of the base paper beneath the blade, that governs the coat weight distribution in blade coating, is affected by moisture from the dewatering coating colours and the compressive force exerted by the blade. Drying strategies were studied to see whether they would induce porosity variations in the coating layers. There is a strong connection between the rate of evaporation and the shrinkage of the coating layer, but no porosity variations due to the choice of drying strategy were found. Shrinkage is governed by the capillary forces. At the same capillary pressure, the coating shrinks more for some binder systems, which is suggested to be due to a weaker chemical interaction between the binder and the pigment. Oxidized starch/latex coatings, stained with a fluorescent marker, had a greater standard deviation in fluorescence intensity than CMC/latex coatings caused by a difference in either porosity or latex distribution. It was shown that calendering introduces porosity variations into the coating layer that are larger for starch-containing coatings. The drying strategies appeared to have a significant effect on these porosity variations and they correlated positively with print mottle in some cases and in another case negatively. In the case of the negatively correlated, the mottle was probably caused by variations in surface porosity existing prior to the calendering.

APA, Harvard, Vancouver, ISO, and other styles

40

Welt, Thomas. "Enzymatic deinking effectiveness and mechanisms." Diss., Georgia Institute of Technology, 1996. http://hdl.handle.net/1853/7067.

Full text

APA, Harvard, Vancouver, ISO, and other styles

41

Johansson, Nils. "Printing colour hard proofs using EFI Colorproof XF v. 3.1 and Photoshop CS3, and production substrates." Thesis, Högskolan Dalarna, Grafisk teknik, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:du-4215.

Full text

Abstract:

EFI Colorproof XF was found to be more convenient from a user’s aspect, and had features which are covered in the ISO 12647-7 standard (e.g. the ability to simulate screening and print margin information), which Photoshop CS3 lacked. None of the proofing systems distinguished itself in a clear way from the other; sometimes, on certain substrates, Photoshop CS3 produced most accurate colours, sometimes EFI Colorproof XF did. Further investigations need to be carried out to tell more exactly which system produce most accurate colours. Only 6 out of 34 simulation-combinations had colours within the tolerances in the standard. The result also shows that the production substrates should not be used as proofing substrates. Instead the proofing papers especially made for ink jet should be used to obtain more colour-accurate prints.

APA, Harvard, Vancouver, ISO, and other styles

42

Nemalili, Fhatuwani Patrick. "Electrical characterisation of simple a-Si:H and nc-Si devices on paper substrates deposited by hot wire chemical vapour deposition and printing techniques." Master's thesis, University of Cape Town, 2004. http://hdl.handle.net/11427/6543.

Full text

Abstract:

Includes bibliographical references (leaves 68-72).
In this work we report on the electrical transport properties of two classes of silicon: hydrogenated amorphous silicon (a-Si:H) obtained by hot wire chemical vapour deposition (HWCVD), and printed nanocrystalline silicon (nc-Si), both deposited on a flexible, lightweight substrate of 80 g m-2 wood-free paper. For different devices such as field effect transistors and n-i-p solar cells, electrical measurements will be discussed. A special emphasis is placed on field effect mobility and amplification factor measurements because these provide information about the quality of the material.

APA, Harvard, Vancouver, ISO, and other styles

43

Skedung, Lisa. "Tactile perception : role of physical properties." Licentiate thesis, Stockholm : Skolan för kemivetenskap, Kungliga Tekniska högskolan, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-11891.

Full text

APA, Harvard, Vancouver, ISO, and other styles

44

Pokpas, Keagan William. "Microfluidic graphenised-paper electroanalytical devices (μGPED) for adsorptive cathodic stripping voltammetric detection of metal contaminants." University of the Western Cape, 2017. http://hdl.handle.net/11394/5506.

Full text

Abstract:

Philosophiae Doctor - PhD
The need for clean, non-toxic drinking water supplies, free of pollutants and metal contamination is vital in impoverished areas and the developing world alike. With this in mind, the development of accurate, inexpensive, portable and simple devices for remote sensing applications is therefore pivotal for early detection and the prevention of illnesses. Over the last two decades, adsorptive stripping voltammetry (AdSV) has emerged as a superior detection method over common analytical techniques due to its low-cost instrumentation, unskilled labour and ability to detect a wide range of analytes.
2020-08-31

APA, Harvard, Vancouver, ISO, and other styles

45

Jacquemoud-Collet, Fanny. "Etiquette RFID bas coût sur support papier : Optimisation du procédé industriel innovant / intégration d’une fonctionnalité capteur." Thesis, Montpellier 2, 2014. http://www.theses.fr/2014MON20194.

Full text

Abstract:

La RFID, pour Identification par Radio Fréquence, s'est considérablement développée depuis quelques années devenant un mode d'identification et de traçabilité incontournable. Les acteurs du marché sont nombreux et parmi eux, Tageos, société Montpelliéraine, a mis en place dès 2008 un procédé innovant de fabrication de l'étiquette RFID sur papier, économique et écologique. Cependant, même si les performances obtenues lors d'un précédent travail (Thèse C. Ramade 2008-2011) ont été suffisantes pour permettre la production de masse, elles ne sont pas optimales notamment vis-à-vis des résultats établis en laboratoire. C'est dans ce cadre-là que se positionne ce travail de thèse qui s'est réalisé toujours en étroite collaboration entre l'Institut d'Electronique du Sud et la société TAGEOS S.A.S. Nos efforts se sont focalisés : sur l'optimisation du processus de réalisation d'antenne RFID en travaillant sur l'analyse, les méthodes ou protocoles et les moyens techniques sur la préparation du substrat papier, sur des solutions alternatives et complémentaires de réalisation d'antenne RFID et de collage de la puce RFID et sur la fiabilisation et la qualité des produits finis. Par ailleurs, dans ce travail nous avons également démontré la valorisation de notre tag RFID bas coût par l'intégration d'un capteur et de sa fonctionnalité. Le processus de réalisation industriel d'un tel tag est abordé en tenant compte de celui de TAGEOS
The RFID, for Radio Frequency Identification, has grown considerably in recent years become an essential mode of traceability and identification. Market players are numerous and among them, Tageos (Montpellier, France) established since 2008 an innovative process for manufacturing the RFID tag on paper, economic and ecologic. However, even if the performances obtained during a previous work (Thesis C. Ramade 2008-2011) were sufficient to allow mass production, they are not optimal in particular with respect to the established results in laboratory. It is in this context that ranks this work which is always carried out in close collaboration between the Institute of Electronics of South and TAGEOS company S.A.S. Our efforts were focused : on process optimization of realization of RFID antenna working on the analysis, methods or protocols and technical resources on the preparation of the paper substrate, on alternative and complementary solutions to realize RFID antenna and RFID chip bonding and on the reliability and quality of finished products. Moreover, in this work we have also demonstrated the valorization of our low cost RFID tag by integrating a sensor functionality. The industrial process of producing of this tag taking accounts of TAGEOS process

APA, Harvard, Vancouver, ISO, and other styles

46

Roman, Dianne L. Ms. "Women at the Crossroads, Women at the Forefront, American Women in Letterpress Printing In the Nineteenth Century." VCU Scholars Compass, 2016. http://scholarscompass.vcu.edu/etd/4595.

Full text

Abstract:

The significant role of the female printer in the American home-based print shops during the colonial and early republic periods has been documented in print history, socioeconomic, labor, and women studies, yet with the industrialization of the printing trade, women’s presence is thought to have disappeared. Contrary to the belief that industrialization of the print shop eradicated women’s involvement in skilled employments such as typesetting, the creation of the Women’s Cooperative Printing Union in California and the creation and chartering of the Women’s Typographical Union in New York, both in the late 1860s, clearly indicate that women continued to work in printing. The assumption that industrialization brought with it the unionization of the trade denies the possibility of non-union shops, as well as the continuation of home-based businesses across the ever-expanding nation as it moved westward. This research has sought to uncover and restore to history women who have been involved in the trade from the early transition of the home shop at the beginning of the 1800s to the signing of the WTU charter in 1869 by union employed compositors, as well as to identify establishments that hired female compositors. Digital newspaper databases have been used as a means of locating both women and opportunities available to them in the American printing trade between 1800 to 1869. Several women significant to this history, both those who have been found to be employed as compositors/typesetters and those who created opportunities for the employment of trained women compositors/typesetters, are discussed.

APA, Harvard, Vancouver, ISO, and other styles

47

Baker, Rebecca Dawn. "Comparing the Readability of Text Displays on Paper, E-Book Readers, and Small Screen Devices." Thesis, University of North Texas, 2010. https://digital.library.unt.edu/ark:/67531/metadc28390/.

Full text

Abstract:

Science fiction has long promised the digitalization of books. Characters in films and television routinely check their palm-sized (or smaller) electronic displays for fast-scrolling information. However, this very technology, increasingly prevalent in today's world, has not been embraced universally. While the convenience of pocket-sized information pieces has the techno-savvy entranced, the general public still greets the advent of the e-book with a curious reluctance. This lack of enthusiasm seems strange in the face of the many advantages offered by the new medium - vastly superior storage capacity, searchability, portability, lower cost, and instantaneous access. This dissertation addresses the need for research examining the reading comprehension and the role emotional response plays in the perceived performance on e-document formats as compared to traditional paper format. This study compares the relative reading comprehension on three formats (Kindle, iTouch, and paper) and examines the relationship of subject's emotional response and relative technology exposure as factors that affect how the subject perceives they have performed on those formats. This study demonstrates that, for basic reading comprehension, the medium does not matter. Furthermore, it shows that, the more uncomfortable a person is with technology and expertise in the requested task (in this case, reading), the more they cling to the belief that they will do better on traditional (paper) media - regardless of how well they actually do.

APA, Harvard, Vancouver, ISO, and other styles

48

Barbosa, Luís Miguel Marques. "Production and characterization of the fusion ZZapo-CBM64 for the capture and detection of apolipoprotein-A1 in paper tests." Master's thesis, Universidade de Aveiro, 2017. http://hdl.handle.net/10773/22709.

Full text

Abstract:

Mestrado em Bioquímica - Métodos Biomoleculares
Affibodies (ZZ) são pequenas proteínas de afinidade que podem ser modificadas para se ligarem a alvos específicos. Estas proteínas têm sido sugeridas como uma alternativa a anticorpos, devido ao seu processo de produção mais simples e barato. Assim, o objetivo deste trabalho de mestrado visou a possibilidade da utilização de um affibody (ZZapo) para a captura da Apolipoproteina-A1 (Apo-A1) e sua deteção com anticorpos Anti-Apo-A1 conjugados com Nanopartículas de Ouro (AuNPs) num Dispositivo Microfluídico Analítico de Papel (μPAD). Para atingir o objetivo proposto, a fusão de uma molécula com afinidade a carboidratos da família 64 (CBM64) com o affibody ZZapo (ZZapo-CBM64) foi desenhada, produzida em E.coli, sequenciada, purificada e quantificada com sucesso. A fusão ZZapo-CBM64 foi comparada com a fusão semelhante ZZ-CBM64, que tem afinidade para imunoglobulina G (IgG). Foi testada a capacidade de ligação das fusões à celulose, tendo-se verificado que ambas apresentaram alta afinidade a micropartículas e papel de celulose. Foi ainda testada a capacidade de ligação das duas fusões a IgG, pela utilização de IgG marcado com fluorescência. No entanto, ao contrário da ZZ-CBM64, a ZZapo-CBM64 não mostrou afinidade para a IgG. Um teste μPAD foi criado com barreiras impressas a cera hidrofóbica, e com um adesivo na base do teste, o que permitiu os testes serem feitos em superfícies planas e ainda contribuiu para um fluxo da amostra mais rápido. Os testes μPAD mostraram interações não específicas entre ZZapo-CBM64 e AuNPs, que foram removidas pela conjugação das AuNPs com Albumina de Soro Bovino (BSA) e adição de BSA e Tween20 à solução tampão. Os testes μPAD para deteção da Apo-A1 mostraram interações não específicas entre Apo-A1 e a membrana adesiva, que foram removidas pela utilização de um tampão de Bicarbonato de Amónia com BSA e Tween20. A deteção de Apo-A1 em μPADs não foi conseguida devido ao ZZapo-CBM64 não capturar a Apo-A1. Esta falha poderá ser devido a algum bloqueio da zona de captura relacionado com a estrutura 3D da fusão. De modo a ultrapassar esta questão, deverão ser realizados trabalhos futuros para o estudo da estrutura 3D da fusão, assim como estudo de outras fusões com diferentes variantes de affibodies para averiguar se o problema é exclusivo à fusão ZZapo-CBM64 ou não.
Affibodies (ZZ) are small affinity proteins that can be engineered to bind to specific targets. These molecules have emerged as an alternative to antibodies due to their simpler and cheaper production process. The objective of this work was thus to assess the possibility of using an affibody (ZZapo) to capture Apolipoprotein-A1 (Apo-A1) and its detection using Anti-Apo-A1 antibodies conjugated to Gold Nanoparticles (AuNPs) on a Microfluidic Paper-Based Analytical Device (μPAD). To achieve the proposed objective, a fusion of a Carbohydrate Binding Molecule of the family 64 (CBM64) with a ZZapo affibody (ZZapo-CBM64) was successfully designed, produced in E. coli, sequenced, purified and quantified. The ZZapo-CBM64 fusion was then compared to a similar ZZ-CBM64 fusion (produced and purified in the same way) with immunoglobulin G (IgG) binding capacity, and tested for its cellulose binding capacity. Both fusions showed high affinity to cellulose particles and paper. They were also tested for IgG binding capacity, using a fluorescently labelled IgG. While ZZ-CBM64 successfully captured IgG, the new ZZapo-CBM64 did not capture the labelled IgG. A μPAD test was designed and produced with wax printed hydrophobic barriers, and the use of an adhesive membrane in the bottom of the test enabled running tests on a flat surface, and contributed for faster sample flow. μPAD tests showed that ZZapo-CBM64 and AuNPs had non-specific interactions, which were removed by conjugating AuNPs with Bovine Serum Albumin (BSA) and using a buffer containing BSA and Tween20. μPAD tests for the detection of Apo-A1 showed non-specific binding of Apo-A1 and the adhesive membrane, which was removed by using ammonium bicarbonate buffer. Apo-A1 detection in μPADs was unsuccessful, which was shown to be caused by ZZapo-CBM64 failing to capture Apo-A1. This failed capture could be caused by the capture zone of the protein being blocked. Future works should be directed to the study of the 3D structure of this fusion, as well as the study of other fusions with different affibody variants to assess if this problem is exclusive to ZZapo-CBM64 or not.

APA, Harvard, Vancouver, ISO, and other styles

49

Klemisch, Linda. "The value of a saved tree : The lifecycle of CO2-emissions associated with the combination of printing paper and electricity production of wood in the U.S. and Sweden." Thesis, Högskolan Dalarna, Grafisk teknik, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:du-3516.

Full text

Abstract:

The pulp- and paper production is a very energy intensive industry sector. Both Sweden and the U.S. are major pulpandpaper producers. This report examines the energy and the CO2-emission connected with the pulp- and paperindustry for the two countries from a lifecycle perspective.New technologies make it possible to increase the electricity production in the integrated pulp- andpaper mill through black liquor gasification and a combined cycle (BLGCC). That way, the mill canproduce excess electricity, which can be sold and replace electricity produced in power plants. In thisprocess the by-products that are formed at the pulp-making process is used as fuel to produce electricity.In pulp- and paper mills today the technology for generating energy from the by-product in aTomlinson boiler is not as efficient as it could be compared to the BLGCC technology. Scenarios havebeen designed to investigate the results from using the BLGCC technique using a life cycle analysis.Two scenarios are being represented by a 1994 mill in the U.S. and a 1994 mill in Sweden.The scenariosare based on the average energy intensity of pulp- and paper mills as operating in 1994 in the U.S.and Sweden respectively. The two other scenarios are constituted by a »reference mill« in the U.S. andSweden using state-of-the-art technology. We investigate the impact of varying recycling rates and totalenergy use and CO2-emissions from the production of printing and writing paper. To economize withthe wood and that way save trees, we can use the trees that are replaced by recycling in a biomassgasification combined cycle (BIGCC) to produce electricity in a power station. This produces extra electricitywith a lower CO2 intensity than electricity generated by, for example, coal-fired power plants.The lifecycle analysis in this thesis also includes the use of waste treatment in the paper lifecycle. Both Sweden and theU.S. are countries that recycle paper. Still there is a lot of paper waste, this paper is a part of the countries municipalsolid waste (MSW). A lot of the MSW is landfilled, but parts of it are incinerated to extract electricity. The thesis hasdesigned special scenarios for the use of MSW in the lifecycle analysis.This report is studying and comparing two different countries and two different efficiencies on theBLGCC in four different scenarios. This gives a wide survey and points to essential parameters to specificallyreflect on, when making assumptions in a lifecycle analysis. The report shows that there arethree key parameters that have to be carefully considered when making a lifecycle analysis of wood inan energy and CO2-emission perspective in the pulp- and paper mill in the U.S. and in Sweden. First,there is the energy efficiency in the pulp- and paper mill, then the efficiency of the BLGCC and last theCO2 intensity of the electricity displaced by BIGCC or BLGCC generatedelectricity. It also show that with the current technology that we havetoday, it is possible to produce CO2 free paper with a waste paper amountup to 30%. The thesis discusses the system boundaries and the assumptions.Further and more detailed research, including amongst others thesystem boundaries and forestry, is recommended for more specificanswers.

APA, Harvard, Vancouver, ISO, and other styles

50

Shao, Botao. "Fully Printed Chipless RFID Tags towards Item-Level Tracking Applications." Doctoral thesis, KTH, Elektroniksystem, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-142409.

Full text

Abstract:

An ID generating circuit is unquestionably the core of a chipless RFID tag. For convenience of printing process and cost consideration, the circuit should be kept as simple as possible. Based on the cognition, an 8-bit time-domain based ID generating circuit that merely consists of a ML and eight capacitors was offered, and implemented on photo-paper substrates via inkjet printing process. In addition to the experimental measurements, the circuit was also input into circuit simulators for cross-validation. The good agreement between simulations and measurements is observed, exhibiting the tag technical feasibility. Besides of low cost, the tag has wide compatibility with current licensed RFID spectrum, which will facilitate the future deployment in real applications. Compared to time-domain based chipless tags, frequency signatures based chipless RFID tags are expected to offer a larger coding capacity. As a response, we presented a 10-bit frequency-domain based chipless RFID tag. The tag composed of ten configurable LC resonators was implemented on flexible polyimide substrate by using fast toner-transferring process. Field measurements revealed not only the practicability of the tag, but also the high signal to noise ratio (SNR). Another frequency domain tag consists of a configurable coplanar LC resonator. With the use of all printing process, the tag was for the first time realized on common packaging papers. The tag feasibility was confirmed by subsequent measurements. Owing to the ultra-low cost potential and large SNR, The tag may find wide applications in typical RFID solutions such as management of paper tickets for social events and governing of smart documents. Ultra wide band (UWB) technology possesses a number of inherent merits such as high speed communication and large capacity, multi-path immunity, accurate ranging and positioning, penetration through obstacles, as well as extremely low-cost and low- power transmitters. Thus, passive UWB RFIDs are expected to play an important pole in the future identification applications for IoT. We explained the feature difference between UWB chipless tags and chip based tags, and forecasted the applications respectively based on the comparison between the two technologies. It is expected that the two technologies will coexist and compensate each other in the applications of IoT. Lastly, the thesis ends up with brief summary of the author’s contributions, and technical prospect for the future development of printable chipless RFID tags.

QC 20140304

APA, Harvard, Vancouver, ISO, and other styles

Dissertations / Theses on the topic 'Paper printing'

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles