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Determination of chromium(VI) extrated from leather by artificial perspiration / Dai Hong in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 93, N° 1 (01-02/2009)
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Titre : Determination of chromium(VI) extrated from leather by artificial perspiration Type de document : texte imprimé Auteurs : Dai Hong, Auteur ; Lin Jin, Auteur ; Feng Guanlin, Auteur ; Zhang Zongcai, Auteur Année de publication : 2009 Article en page(s) : p. 26-28 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Chrome
Cuirs et peaux
Photométrie
TranspirationIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Determination of chromium(VI) in leather using extraction with an artificial perspiration solution and subsequent determination with a DPC photometric method has been studied. The results show that correlation coefficient was 0,9999, which testifies to the good linearity of this method. Furthemore, RSD (n=8) and the recovery percentage were 2.05 % and 94.3 %-103.8 % which also illustrates the feasibility and reliability of the method. En ligne : https://drive.google.com/file/d/12OBqDwSaCh5XHaurjld_af7cnvpSZbY0/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=4102
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 93, N° 1 (01-02/2009) . - p. 26-28[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 011127 - Périodique Bibliothèque principale Documentaires Disponible Development of natural colours in Cr-Fe tanned garment leathers / J. R. Rao in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 86, N° 3 (05-06/2002)
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Titre : Development of natural colours in Cr-Fe tanned garment leathers Type de document : texte imprimé Auteurs : J. R. Rao, Auteur ; Palanisamy Thanikaivelan, Auteur ; J. Malathi, Auteur ; R. Rajaram, Auteur ; Balachandran Unni Nair, Auteur Année de publication : 2002 Article en page(s) : p. 106-111 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Acacia et constituants
chataigner et constituants
Chrome
Colorimétrie
Croûte (cuir)On entend par "cuir en croûte" des cuirs ayant subi les opérations jusqu'au tannage, à l'exclusion de toute opération de corroyage ou de finissage, mais qui, par opposition aux wet-blue ont été séchés.
Cuirs et peaux -- Propriétés physiques
Cuirs et peaux -- Teinture
Fer
Myrobalan et constituants
QuebrachoLe quebracho est un arbre à écorce ligneuse, mesurant 30 mètres de haut, à feuilles tannées et à fleurs tubulées blanches.
Quebracho est l'un des noms communs, en espagnol, d'au moins trois espèces similaires d'arbres originaires du Gran Chaco, en Amérique latine : Schinopsis lorentzii (quebracho colorado santiagueño), de la famille des Anacardiaceae ; Schinopsis balansae (quebracho colorado chaqueño), de la même famille ;
Aspidosperma quebracho-blanco (quebracho blanc), de la famille des Apocynaceae.
Ces trois espèces sont riches en tanin et fournissent un bois très dur, particulièrement résistant. Leur nom provient de l'espagnol quiebrahacha, qui signifie brise-hache.
Réflectance
Résistance à l'abrasion
Tanins végétaux
Tannage minéralTannage dans lequel interviennent différents minéraux. Le plus répandu est le tannage aux sels de chrome, mais aussi à l’aluminium
Vêtements en cuirIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Dyes based on synthetic formulations are widely used in the leather industry, however, many aryl amine dyes are restricted due to their carcinogenic nature. Environmental concern leads one to look for the dye products based on natural resources, which may have advantages of biodegradability and lower toxicity. We aimed to create an eco-friendly dyeing process by forming in-situ complexes between vegetable tannins and the Cr-Fe tanning salt, where the use of iron salts results in various colours on reaction with various vegetable tannins. Sheepskins were tanned using the Cr-Fe tanning salt and treated with various vegetable tanning materials, brown, black and grey shades were developed. The shades obtained have been quantified by reflectance measurements and compared by visual assessment.
Strength characteristics of the leathers treated with 5% vegetable tannins are higher than those treated with 1% tannins, bulk properties not being affected with the increase in concentration from 1 to 5%. The light, wet and dry rub fastness of the naturally coloured leathers are good with no change on ageing. Colour reproduction at bulk level production is acceptable with minor batch variations.Note de contenu : - EXPERIMENTAL DETAILS : Process details for larger scale trials - Physical testing
- RESULTS AND DISCUSSION : Wattle - Chestnut - Myrobalan - Quebracho - Environmental Perception
- Table 1 : Percentage reflectance measurement for garment leathers coloured with various concentrations of wattle
- Table 2 : Visual assessment data of the garment samples treated with various concentrations of wattle (Grade points 0-poor and 10-very good)
- Table 3 : Visual assessment data of the garment samples treated with various concentrations of chestnut (Grade points 0-poor and 10-very good)
- Table 4 : Visual assessment data of the garment samples treated with various concentrations of myrobalan (Grade points 0-poor and 10-very good)
- Table 5 : Percentage reflectance measurement for garment leathers coloured with various concentrations of quebrancho
- Table 6 : Visual assessment data of the garment samples treated with various concentrations of quebracho (Grade points 0-poor and 10-very good)
- Table 7 : Strength characteristics for various crust garment leathers
- Table 8 : Visual assessment data for garment leathers treated with selected concentrations of vegetable tannins
- Table 9 : Fastness of the naturally coloured leathers treated with selected concentration of vegetable tannins to wet, dry rubbing and artificial light
- Table 9 : Comparison of colour measurements data between the sample and bulk colouration of leathers using selected concentration vegetable tanninsEn ligne : https://drive.google.com/file/d/1cy6baDBVvluD26gKPLzG7iFzZjo83l1w/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39924
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 86, N° 3 (05-06/2002) . - p. 106-111[article]Dimensionally stable anodes used in hard chrome plating / Thomas Ebert in INTERNATIONAL SURFACE TECHNOLOGY (IST), Vol. 8, N° 2 (2015)
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Titre : Dimensionally stable anodes used in hard chrome plating Type de document : texte imprimé Auteurs : Thomas Ebert, Auteur ; Franck Friebel, Auteur Année de publication : 2015 Article en page(s) : p. 50-51 Langues : Anglais (eng) Catégories : Anodes
Chrome
Dépôt électrolytique
Economies d'énergie
Revêtement métalliqueIndex. décimale : 667.9 Revêtements et enduits Résumé : Alternatives to lead anodes - In the hard chrome plating process, dimensionally stable anodes offer several advantages in comparison to conventional systems, such as lead anodes. Their significantly lower energy consumption, shorter downtimes and reduced disposal costs have a major impact in the long term. Note de contenu : - Concealed costs of disposal and maintenance
- Assessing the cost-effectiveness of platinised anodes
- The ideal cost/benefit ratio
- High-temperature electrolysis produces higher quality results
- Improved coating thickness distribution
- A range of applications for platinised anodesPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24922
in INTERNATIONAL SURFACE TECHNOLOGY (IST) > Vol. 8, N° 2 (2015) . - p. 50-51[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 17360 - Périodique Bibliothèque principale Documentaires Disponible Do leather anisotropic properties have an effect on shrinkage temperature ? / Ewa Marcinkowska in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIII, N° 5 (05/2018)
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Titre : Do leather anisotropic properties have an effect on shrinkage temperature ? Type de document : texte imprimé Auteurs : Ewa Marcinkowska, Auteur ; Gabriela Zielinska, Auteur Année de publication : 2018 Article en page(s) : p. 163-171 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anisotropie
Chrome
Cuirs et peaux -- Analyse
Cuirs et peaux -- Propriétés mécaniques
Essais dynamiques
Glutaraldéhyde
Statistique
Tannage
Température de retrait
Traction (mécanique)Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Herein are the results of studies of mechanical properties and shrinkage temperature of cowhide leather tanned with modified glutaraldehyde and chrome. The tests were carried out on samples cut from both kinds of leather parallel and perpendicular to the backbone. The aim of these studies was determining whether the sample orientation to the backbone, thus leather anisotropic properties defined by its tensile strength and ultimate extension, has an effect on shrinkage temperature and kinetics of this process.
Mechanical properties were tested according to PN-EN ISO 3376:2012 Leather – Physical and mechanical tests – Determination of tensile strength and percentage extension. The conditions for shrinkage temperature measurements were set according to guidelines specified in PN-EN ISO 3380:2015-11 Leather – Physical and mechanical tests – Determination of shrinkage temperature up to 100°C. The experiment was carried out by using an instrument of our own design enabling automatic recording of leather specimen length changes during measurement.
The results of mechanical tests allowed the determination of the degree of differentiation of obtained tensile strength and ultimate extension values depending on test sample orientation to the backbone. For leather tanned with modified glutaraldehyde the coefficient of variation with respect to tensile strength in both directions was 0.31, while for chrome tanned leather was 0.44. The coefficient of variation for ultimate extension calculated for both directions was 0.55 and 0.42 for glutaraldehyde and chrome tanned leathers, respectively.
The slope of obtained regression lines was compared to find any statistically significant differences in leather shrinkage rate depending on orientation to the backbone. The results of analyses performed for two differently tanned leathers show no statistically significant differences in shrinkage rate depending on cut orientation. Thus, anisotropy of mechanical properties of leather samples under investigation does not affect both shrinkage temperature and the rate of this process.Note de contenu : - MATERIAL
- METHODS : Mechanical properties test method - Method to measure and analyze leather shrinkage temperature - Methods of statistical analysis
- TABLES : 1. Tensile strength and ultimate extension for themodified glutaraldehyde-tanned leather - 2. Tensile strength and percentage extension for the chrome-tanned leather - 3, 4, 5, 6 - Summary results of fitting a model y=A*+B at α = 0.05En ligne : https://drive.google.com/file/d/1CtzGHhwPpBlMy9Wp8yw3WGOKxayuLAE5/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30534
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXIII, N° 5 (05/2018) . - p. 163-171[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 19877 - Périodique Bibliothèque principale Documentaires Disponible Effect of co-combustion of tannery sludge and coal on the migration of Cr in the bottom ash / Jianfei Zhou in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 98, N° 1 (01-02/2014)
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Titre : Effect of co-combustion of tannery sludge and coal on the migration of Cr in the bottom ash Type de document : texte imprimé Auteurs : Jianfei Zhou, Auteur ; Ya-Nan Wang, Auteur ; Xuepin Liao, Auteur ; Wenhua Zhang, Auteur ; Bi Shi, Auteur Année de publication : 2014 Article en page(s) : p. 35-41 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Boues résiduaires -- Analyse
Chrome
Combustion
Déchets industriels -- Elimination
Tannage -- DéchetsIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : The feasibility of co-combustion of tannery sludge and coal as well as mono-combustion of the sludge was analyzed by tracking the migration of Cr in the sludge and its bottom ash. Most of the Cr was found to be fixed in the bottom ash during combustion when the temperature was not over 600°C. For further analysis of the migration behaviour of Cr after combustion, speciation of Cr in bottom ash was determined by BCR (Community Bureau of Reference) method. It was found that a great deal of Cr was converted from oxidizable fraction in sludge to exchangeable fraction in bottom ash. Moreover, acid leaching test indicated Cr stabilized in the original sludge became easier to leach from the bottom ash. These facts suggest the environmental risk of Cr in the ash is much higher than in the original sludge. Therefore, co-combustion of sludge and coal without any further treatment is not a feasible way to dispose of Cr enriched tannery sludge. Note de contenu : - EXPERIMENTAL PROCEDURES : Materials - Sample preparation - Characteristics of tannery sludge - Co-combustion of tannery sludge and coal - Analytical methods
- RESULTS AND DISCUSSION : Characteristics of tannery sludge - Contents of Cr in bottom ashes - Speciation of Cr in bottom ashesEn ligne : https://drive.google.com/file/d/1Pjkbk-U_COgMr5D--vf1eALaOW3_ItQE/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=21017
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 98, N° 1 (01-02/2014) . - p. 35-41[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 16162 - Périodique Bibliothèque principale Documentaires Disponible Effect of different tanning agents on the degree of grafting onto hide / N. H. El-Sayed in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 87, N° 4 (07-08/2003)
PermalinkEffect of tanning agents on collagen structure and response to strain in leather / Katie H. Sizeland in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXI, N° 11 (11/2016)
PermalinkEssais des eaux. Dosage de dix éléments métalliques (Cr, Mn, Fe, Co, Ni, Cu, Zn, Ag, Cd, Pb) par spectromérie d'absorption atomique - Norme NF T 90-112 / Association Française de Normalisation (Paris) / Saint-Denis La Plaine : Association Française de Normalisation (AFNOR) (1976)
PermalinkEtude de la formation d'ions complexes dans les solutions tannantes de sulfate d'alumine et d'alun de chrome / François Grall / 1951
PermalinkExposés scientifiques et techniques pour la fabrication du cuir / Badische Anilin und Soda-Fabrik (Ludwigshafen am Rhein, Germany) / Ludiwigshafen am Rhein [Germany] : BASF (nd)
PermalinkForm meets function / Heiko Viecenz in INTERNATIONAL SURFACE TECHNOLOGY (IST), Vol. 5, N° 1 (2012)
PermalinkFTIR studies of the effects of outdoor exposure on varnish-coated wood pretreated with CCB or water repellents / Mustafa Kemal Yalinkilic in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 71, N° 895 (08/1999)
PermalinkHarnessing the sun / Kararzyna A. Michalow in EUROPEAN COATINGS JOURNAL (ECJ), N° 07-08/2012 (07-08/2012)
PermalinkPermalinkInfluence de l'effet thermique du plaquage sur l'hydrophilie du cuir au chrome nourri / Jean Poré in TECHNICUIR, N° 6 (06-07/1978)
PermalinkInteraction of aldehyde developed from amino acids of tannery waste in a lower - chrome tannage an eco-friendly approach / James Kanagaraj in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 89, N° 1 (01-02/2005)
PermalinkInvestigation into the hazards of finished Cr-tanned leather as both product and waste / Liangqiong Peng in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 103, N° 1 (01-02/2019)
PermalinkInvestigation of the structure of leathers tanned with chrome-zirconium complex tanning material / T. Karnitscher in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 68 (Année 1984)
PermalinkInvestigations of the mechanism of the reactions of acrylic resin tannage with chrome leather / Li Sheng in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXXIV (Année 1989)
PermalinkIonic liquid functionalised nanoparticles based tanning system as a less chrome tanning approach / Inbasekar Chandrasekar in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVI, N° 1 (01/2021)
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