Relevant bibliographies by topics / Vegetable tanned leather

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Academic literature on the topic 'Vegetable tanned leather'

Author: Grafiati
Published: 4 June 2021
Last updated: 7 February 2022

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Journal articles on the topic "Vegetable tanned leather"

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Udkhiyati, Mustafidah, and Fitrilia Silvianti. "The Utilization of Chitosan as Natural Antibacterial for Vegetable Tanned Leather." Materials Science Forum 948 (March 2019): 212–16. http://dx.doi.org/10.4028/www.scientific.net/msf.948.212.

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Leathers, which are made from natural fibers, can serve as media for microorganisms to grow. The currently used antimicrobial agents or biocides in the leather industry are harmful to human health and the environment. Therefore, the use of antimicrobial agents should be restricted. This study aims at developing eco-friendly biocides that could substitute for toxic chemicals as it will be tested on vegetable-tanned leather. Due to their large surface area and ability to retain moisture, the vegetable tanned leather has a higher possibility of biodeterioration than other types of leathers tanned by mineral tanning agents. In this work, the natural biopolymer of chitosan was chosen for its ability to inhibit the bacterial growth. The results showed that chitosan coating by impregnation method in drum using chitosan/leather ratio of 1% in formic acid for 2 hours is successfully achieved the bacterial growth inhibition.
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UDKHIYATI, Mustafidah, Nur Mutia ROSIATI, and Fitrilia SILVIANTI. "The Influence of Chitosan towards Antibacterial Properties in Natural Leather." Leather and Footwear Journal 20, no. 4 (December 15, 2020): 425–34. http://dx.doi.org/10.24264/lfj.20.4.8.

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The abundant hydroxyl groups (-OH) of vegetable tanned leather enhances the bacterial growth possibility. In this work, antibacterial vegetable tanned leather was developed taking advantage of chitosan antibacterial activity. Different chitosan utilization method was conducted, namely drum impregnation and spraying. Antibacterial testing was carried out using agar diffusion method to identify the effect of chitosan against Gram-positive bacteria (Staphylococcus aureus). The results showed that the use of 1% (w/v) chitosan by spraying method tends to be more effective in improving the antibacterial properties of vegetable tanned leather. While, the leather sample of drum impregnation at initial pH 4 has the lowest antibacterial activity among others. The results of FTIR analysis showed that there was no significant difference between control and chitosan modified tanned leather, confirming the similar functional groups between it.
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Sendrea, Claudiu, Cristina Carsote, Mihai Radu, Elena Badea, and Lucretia Miu. "The Effect of Gamma Irradiation on Shrinkage Activity of Collagen in Vegetable Tanned Leather." Revista de Chimie 68, no. 7 (August 15, 2017): 1535–38. http://dx.doi.org/10.37358/rc.17.7.5711.

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The dose dependent effect of gamma irradiation on collagen in vegetable tanned leather was studied by the MHT method. Examination of the irradiated samples at 3 months after the irradiation treatment revealed variations of the main shrinkage temperatures and intervals. Up to 25 kGy, the shrinkage temperature does not vary while the total shrinkage interval decreases suggesting cross-linking as the main process. At higher doses, the decrease of shrinkage temperature is accompanied by the increase of the total shrinkage interval indicating that peptide chain scission becomes predominat. Quebracho-tanned sheep leather shows to be the less resistant to the deterioration effect of gamma radiations, while both mimosa-tanned goat leather and quebracho-tanned calf leather better withstand the destabilization effects.
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Conde, Mireia, Felip Combalia, Lluis Ollé, and Anna Bacardit. "Pine Tannin Extraction from Residues of Pine Forest Exploitation." Journal of the American Leather Chemists Association 115, no. 6 (June 1, 2020): 215–21. http://dx.doi.org/10.34314/jalca.v115i6.3821.

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The main aim of this study is to use the vegetable extract obtained from the residues of pine forest exploitation as a source of tannins that, acting both as a tanning and retanning agent, can replace other vegetable extracts and chrome in leather tanning. The study thus proposes a bio resource more sustainable to use in tanning process that avoids the use of chemical products that are detrimental to our health and can have an impact on the biodegradable nature of the final tanned leather. Furthermore, in addition to the benefits of using a new, fully biodegradable tanning material (Biodegradability of vegetable tanned leather is poor than chrome tanned leather), this is a locally sourced product, which allows the carbon footprint to be notably reduced (Vegetable tanning contributes more carbon foot print than chrome tanning). Additionally, it should be possible to add value to forestry residues over a short period of time, which would undoubtedly contribute to improving forest management in Spain and would also be beneficial in many ways.
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Gao, Yanping, Shuang Yang, Xiaoyun Jian, Lucretia Miu, Carmen Gaidau, and Wuyong Chen. "Effect of UV Irradiation on Vegetable Tanned Leather." Leather and Footwear Journal 15, no. 4 (December 15, 2015): 219–28. http://dx.doi.org/10.24264/lfj.15.4.1.

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LAMB, M. C., and H. ANDERSON. "Penetration of Acid Dyes into Vegetable-tanned Leather." Journal of the Society of Dyers and Colourists 50, no. 7 (October 22, 2008): 216. http://dx.doi.org/10.1111/j.1478-4408.1934.tb01834.x.

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Mondal, AK, and PK Chattopadhyay. "Influence of the micro-structural factors upon thermal and mechanical properties of various bag leathers." Bangladesh Journal of Scientific and Industrial Research 52, no. 3 (October 3, 2017): 167–76. http://dx.doi.org/10.3329/bjsir.v52i3.34147.

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Four different bag leathers, such as, Sheep Bag Leather (SBL), Buffalo Vegetable Tanned Leather (BVTL), Cow Drum Dyed Dry Milled Leather (CDDDML), and Cow Crocodile Print Leather (CCPL), were processed by different methods from respective wet-blues of Indian origin. Thermal degradation pro?le and mechanical properties of the samples were evaluated, and crosslink densities of each sample were measured by ?tment of Mooney-Rivlin equation on stress-strain plots. Morphological characteristics (e.g. ?bre structure, ?bre thickness, splitting etc.) of all the specimens were investigated by image analyses of SEM photomicrographs. The highest crosslinking density for BVTL was attributed to its higher ?bre and ?bril thicknesses coupled with rigorous retanning by vegetable tannins and syntans. Embossing at higher temperature and pressure reduced CCPL’s elongation-at-break value and hence stretchiness possibly due to the development of set properties within the CCPL matrix. SBL was noted to contain huge void spaces that increased its stretchiness, and melamine formaldehyde syntans showed pronounced in?uence in increasing the thermal resistance of both CCPL and CDDDML.Bangladesh J. Sci. Ind. Res. 52(3), 167-176, 2017
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Jing, Li, Gong Taisheng, Xu Haiyan, Chen Yangyi, Huang Shaoqing, and Zhong Huafeng. "Study on dyeing of vegetable tanned leather with indigo." Journal of Physics: Conference Series 1790, no. 1 (February 1, 2021): 012003. http://dx.doi.org/10.1088/1742-6596/1790/1/012003.

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Sefaah, Jennifer Tabi, Eric Apau Asante, and Kwadwo Fosu Duako. "Methods used to manage defects related to vegetable tanned leather." Leather and Footwear Journal 19, no. 2 (June 30, 2019): 123–30. http://dx.doi.org/10.24264/lfj.19.2.4.

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Romer, Frederik H., Andrew P. Underwood, Nadine D. Senekal, Susan L. Bonnet, Melinda Duer, David G. Reid, and Jan H. Van der Westhuizen. "Tannin Fingerprinting in Vegetable Tanned Leather by Solid State NMR Spectroscopy and Comparison with Leathers Tanned by Other Processes." Molecules 16, no. 2 (January 28, 2011): 1240–52. http://dx.doi.org/10.3390/molecules16021240.

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Dissertations / Theses on the topic "Vegetable tanned leather"

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Munyai, Keneilwe. "Small-scale sustainable vegetable-tanned leather in rural South Africa: a collective-efficiency approach." Thesis, Cape Peninsula University of Technology, 2014. http://hdl.handle.net/20.500.11838/1338.

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Thesis submitted in fulfilment of the requirements for the degree: Doctor of Technology: DESIGN In the Faculty of Informatics and Design At the Cape Peninsula University of Technology
Currently, the South African leather tanning industry is dominated by chromium tanning which has been identified as highly polluting. Vegetable tanning is considered less environmentally hazardous. Yet, there have been no plans to promote it in South Africa. Vegetable tanning process utilises vegetable matter for converting animal skins or hides into pliable material that is known as leather. South Africa has a variety of plants that produce tannins. However, the focus of this study is on the mimosa locally known as black wattle (Arcacia miernsii). Furthermore, the South African vegetable tanning sector has been left behind in terms of research and development despite the country being endowed with the Mimosa plant that is widely used in the vegetable tanning process. The country is also endowed with surplus labour which can be absorbed by the leather industry which is labour intensive.
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Poles, Eric, Alessandra Polissi, A. Battaglia, S. Giovando, and M. Gotti. "Study on the antibacterial properties of leathers tanned with natural tannins and their interactions with shoes inhabiting bacteria - 15." Verein für Gerberei-Chemie und -Technik e. V, 2019. https://slub.qucosa.de/id/qucosa%3A34222.

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Content: Tannins are high molecular weight polyphenols, naturally synthesized by plants to defend themselves against biotic and abiotic stress factors. Their role as antioxidant, antibiotic and antibacterial agent has been known for many years among agriculture, food, pharma and cosmetics industry. If tannins would perform an antibacterial activity in a vegetable tanned leather, the leather itself could be certified as an antibacterial material. This effect could be very interesting for all the applications in which the leather, being in contact with sweat and bacteria, becomes a solution to reduce more or less severe hyperhidrosis and bromhidrosis. The goal of the study was the assessment of the antibacterial activity of vegetable tanned leathers with natural tannins to produce articles in direct contact with human skin and, therefore, their effect on sweat, bacterial growth and metabolite production. Firstly, the antibacterial activity has been evaluated and compared between leathers tanned with Chestnut, Quebracho and Tara extracts, chrome tanned leathers and synthetic materials. The trial was performed in vitro by inoculating gram positive (Staphylococcus aureus) and gram negative (Escherichia coli) bacterial strains. A later step defined the most suitable blend of tannins to obtain, after tanning and/or retanning, an antibacterial natural leather. Furthermore, the vegetable tanned leathers, made with this tannins blend, have been the target of an in vivo trial during which 15 panelists have worn two differently made shoes. The lining and insole inside the right shoe have been made with vegetable tanned leathers with tannins, while the ones inside the left shoe contained only synthetic material. The shoes have been worn for 28 consecutive days, followed by a molecular and bioinformatic analysis of microbiota samples taken from the inner surface of the shoes by using a sterile swab. Lastly, a biochemical analysis of volatile short chain fatty acids has been carried out to investigate the byproducts of the bacteria responsible for the unpleasant odor of shoes. Take-Away: 1. Vegetable tanned leather is a wonderful antibacterial material thanks to the presence of natural tannins, such as chestnut, quebracho and tara. This property is appreciated in the production of insole leather, lining, leather goods and automotive interiors. 2. The problem of bromhidrosis (bad feet odor) can be avoided by using vegetable tanned leather. 3. In particular, vegetable leathers tanned with tannins used to make inside part of the shoes permit to avoid the formation of cheesy and acidic odours thanks to their antibacterial properties and their capacity to absorb sweat.
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Books on the topic "Vegetable tanned leather"

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René, Larsen, ed. Deterioration and conservation of vegetable tanned leather. [Denmark: s.n., 1997.

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Rene, Larsen, Commission of the European Communities., and Royal Danish Academy of Fine Arts. School of Conservation., eds. Deterioration and conservation of vegetable tanned leather. [København]: European Commission, 1996.

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Rene, Larsen, ed. STEP leather project: Evaluation of the correlation between natural and artificial ageing of vegetable tanned leather anddetermination of pparameters for standardization of an artificial ageing method : sponsored by the "Protection and Conservation of the European Cultural Heritage" area of the "Science and Technology in Environmental Protection" research program of the European Commission, the General Directorate XII for Science, Research and Development. Copenhagan: Bjarnholt Repro, 1994.

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Conference papers on the topic "Vegetable tanned leather"

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Sendrea, Claudiu, Maria-Cristina Micu, Emanuel Hadimbu, Simona Maria Paunescu, Iulia Maria Caniola, Madalina Ignat, Lucretia Miu, and Elena Badea. "Micro DSC and NMR MOUSE studies of collagen–vegetable tannin interaction mechanism during leather making." In The 8th International Conference on Advanced Materials and Systems. INCDTP - Leather and Footwear Research Institute (ICPI), Bucharest, Romania, 2020. http://dx.doi.org/10.24264/icams-2020.v.13.

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In this study NMR MOUSE and micro DSC techniques were used to investigate the interaction between collagen and various vegetable tannins during leather making process with the aim of gaining a deeper understanding of different water environment in relation to tannin type. We have previously showed that relaxation times may provide useful information on collagen matrix properties. The vegetable tanned leathers were obtained by patented techniques inspired from ancient recipes at the National R&D Institute for Textile and Leather, ICPI Division, Bucharest using various vegetable extracts such as myrobalan, gambier and chestnut. Longitudinal and transversal relaxation times T1 and T2eff were measured using a PM2 portable NMR-MOUSE with 20.05 MHz frequency. Micro DSC measurements were carried out with a high-sensitivity SETARAM Micro-DSC III in the temperature range (5 to 95) °C at 0.5 K min-1 heating rate. The investigated leathers showed significant differences in the values of spin-spin (T2eff) and spin-lattice (T1) relaxation times depending on tannin type that well corelates with the variation of the calorimetric parameters (denaturation temperature and enthalpy, peak shape). These results highlight the complementarity of the information obtained by the two techniques and open new ways for both designing new leather assortments and analyses of historical and archaeological leather.
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Niculescu, Olga, Carmen Gaidau, Elena Badea, Lucretia Miu, Dana Gurau, and Demetra Simion. "Special effect finish for bookbinding leather." In The 8th International Conference on Advanced Materials and Systems. INCDTP - Leather and Footwear Research Institute (ICPI), Bucharest, Romania, 2020. http://dx.doi.org/10.24264/icams-2020.ii.21.

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The art of bookbinding requires not only skills in the old craft of bookbinding but also materials that can transform a simple book into a high-quality artistic product. Due to its unique properties, leather still remains the first-choice material in the case of art and archival bindings. However, the long-term durability of modern leather is not known since there is little commercial interest in long periods of durability and the market of leather for art, design and archival purposes is very small. It is worth noting that deterioration is influenced by the manufacturing technology, and especially by the chemical ingredients used in the various steps of leather making, from dehairing to tanning and finishing. It is therefore very likely that modern and contemporary artworks made of/with modern leather undergo faster degradation than ancient and medieval artworks. Thus, leather finishing is very important for both artistic and sustainable points of view. In fact, finishes with special effects such as antique, bicolour, printed, cracked, waxy are highly sought for vegetable tanned leather used for artistic and luxury bookbinding, archival bookbinding and restoration purposes. The evolving leather finishing technology of chrome-free leather (i.e. vegetable tanned leather) has enabled us to protect and improve the quality, look and feel of leather and to make it suitable for contemporary art bindery.
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Ignat, Madalina, Lucretia Miu, Emanuel Hadimbu, Claudiu Sendrea, Maria-Cristina Micu, Simona Maria Paunescu, Iulia Maria Caniola, and Elena Badea. "The influence of TiO2 and N-TiO2 nanopowders in natural leather finishing for heritage or modern binding." In The 8th International Conference on Advanced Materials and Systems. INCDTP - Leather and Footwear Research Institute (ICPI), Bucharest, Romania, 2020. http://dx.doi.org/10.24264/icams-2020.v.3.

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The methods for processing raw hides over time, have been numerous: smoke, fat, fermented milk, egg, volcanic soils, plants (shells, fruits, leaves) and so on. The books binding with leather has its origins in the Orient and are known various types of goatskin and calfskin, tanned with sumac finished marbled (sapphire), in black (Moroccan), by floating and dyeing in various colors (Cordoba leathers). Preoccupations regarding the assurance of optimal characteristics for the binding leathers, respectively the durability of the leathers for the restoration of the patrimony objects or of the modern binding were of the most topicality in the last decades, abroad and also in our country. The paper describes the finishing of vegetable and alum tanned leather samples that have been functionalized with titanium dioxide (TiO2) or nitrogen-doped titanium dioxide (N-TiO2) nanopowders, in different concentrations. To simulate soiling in real conditions, four types of soiling agents were applied: tea, coffee, beetroot extract and pen paste. The samples were exposed to irradiation in a photoreactor with various light sources for up to 192 hours. The evaluation of the photocatalytic degradation was performed by the CIELab technique.
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Miu, Lucretia, Mariana Giurginca, Iulia-Maria Caniola, Maria-Cristina Micu, Simona-Maria Paunescu, Claudiu Sendrea, and Elena Badea. "Chromatic assessment of newly manufactured leather and parchment for museum purposes." In The 8th International Conference on Advanced Materials and Systems. INCDTP - Leather and Footwear Research Institute (ICPI), Bucharest, Romania, 2020. http://dx.doi.org/10.24264/icams-2020.v.6.

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Cultural heritage represents a national treasure evolving from the culture and spirituality of people. Therefore, it must be continuously recovered, protected and developed by all generations as priceless heritage. Referring to the Romanian cultural heritage items that are placed in restoration, at present, some works have been done for partial or complete replacing of degraded materials, both as the result of ageing under atmospheric and biologic agents. The aim of this study is testing different samples of new leather and parchment under UV radiation in the 220-380nm domain, in order to simulate the accelerated destruction in photo-oxidative conditions. The following materials have been studied: book binding leather obtained from calf hide, tanned by different systems (vegetable or vegetable and chromium) and parchment obtained from different kinds of animals. The evolution of the chromatic characteristics (luminosity, shade and chroma) at different exposure time was quantified by the diffuse reflectance technique in visible domain range and CIE-Lab software. Based on the chromatic stability after UV exposure, the most stable types of leather and parchment have been selected for further applications in the restoration process of historical manuscripts and books' covers.
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Miu, Lucretia, Simona-Maria Paunescu, Maria-Cristina Micu, Iulia-Maria Caniola, Madalina Ignat, Claudiu Sendrea, and Elena Badea. "Chemical and physico-mechanical characterizations of leather for restoration." In The 8th International Conference on Advanced Materials and Systems. INCDTP - Leather and Footwear Research Institute (ICPI), Bucharest, Romania, 2020. http://dx.doi.org/10.24264/icams-2020.v.7.

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Leather is a complex material mostly consisting of a matrix of collagen, chemically stabilized by various tannins. This matrix, sooner or later undergoes alterations as a consequence of interactions between their structure and environment. A comprehensive study based on multiple chemical and physico-mechanical standard tests regarding leather samples which were artificially aged from 7 to 112 days has been made at 70°C. The behavior in artificial aging of calf leather samples tanned at pilot level with two different vegetal tannins, mimosa and quebracho, were investigated due to its’s similarity to the natural degradation of historical leather samples. Physico-mechanical characteristics of historical leather can be corelated with the high impact of degree of deterioration even though there are no standard regulations. To be able to choose the proper way to achieve compatibility with an appropriate material in the restoration-conservation process, multiple sample characteristic must be known. The condition of historical leather can be assessed by a series of simple visual and physical examinations which determine the flexibility, strength and coherency of the fibers and then correlate these assessments with the condition of leather as determined by various chemical and physical-chemical analyses. Therefore, the following chemical standard tests were made: volatile substances, shrinkage temperature, extractable substances, total soluble substances and the following physico-mechanical tests: tensile strength, elongation at breaking and tear resistance.
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