Accueil
Catégories
> Wet-blue (tannage)
Peau tannée au chrome (le chrome donne une couleur bleue)
Wet-blue (tannage)
Commentaire :
Peau tannée au chrome (le chrome donne une couleur bleue)
Voir aussi |
Ajouter le résultat dans votre panier Affiner la recherche
Etendre la recherche sur niveau(x) vers le bas
[article]
Titre : Les problèmes de teinture en mégisserie Type de document : texte imprimé Auteurs : A. Fournier, Auteur Année de publication : 1979 Article en page(s) : p. 108-113 Langues : Français (fre) Catégories : Colorants
Cuir nappa
Cuirs et peaux -- Teinture
Cuirs et peaux d'agneaux
Cuirs et peaux de chevreaux
Cuirs et peaux de chèvres
Cuirs et peaux de moutons
Wet-blue (tannage)Peau tannée au chrome (le chrome donne une couleur bleue)Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Une étude comparative a été effectuée sur 9 supports couramment fabriqués en mégisserie, à l'aide de trois colorants : acide, direct et métallifère, à deux concentrations différentes.
Les résultats obtenus permettent de définir, pour chaque type de support, la famille de colorants la mieux appropriée selon le critère recherché : intensité ou vivacité de la teinte en surface, pénétration du colorant en profondeur, en tenant compte du taux d'épuisement du bain de teinture et de sa concentration.Note de contenu : - ELEMENTS EN PRESENCE : Les substrats
- MODE OPERATOIRE DE TEINTURE : Remouillage - Teinture à 5% de colorant
- EXPRESSION DES RESULTATS : Définition des critères d'appréciation - Système de cotation - Présentation des résultats
- INTERPRETATION ET COMMENTAIRES : Epuisement - Colorants A - B - C - 5% - Tranche - Colorants A - B - C - à 5% - Intensité de surface - Colorants A - B - C - à 5% - Epuisement - Colorants A - B - C - à 10% - Tranche - Colorants A - B - C - à 10% - Intensité de surface - Colorants A - B - C - à 10% - Intensité de surface - Colorant direct 5-10% - Intensité de surface - Colorant métallifère 5-10% - Tranche - Colorants A - B - C - 5-10% - Epuisement - Colorants A - B - C - 5-10%En ligne : https://drive.google.com/file/d/1gR5GskxYG7KDjhJAhIz1qp3uMwhALnbJ/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33261
in TECHNICUIR > N° 6 (06-07/1979) . - p. 108-113[article]Réservation
Réserver ce document
Exemplaires (2)
Code-barres Cote Support Localisation Section Disponibilité 009127 - Périodique Bibliothèque principale Documentaires Disponible 21349 - Périodique Bibliothèque principale Documentaires Disponible Quality enhancement of low grade wet blue leathers : up-grading of thin substance in the wet end process / K. Gowthaman in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CVII, N° 9 (09/2012)
[article]
Titre : Quality enhancement of low grade wet blue leathers : up-grading of thin substance in the wet end process Type de document : texte imprimé Auteurs : K. Gowthaman, Auteur ; S. Vikram, Auteur ; N. N. Fathima, Auteur ; Jonnalagadda Raghava Rao, Auteur Année de publication : 2012 Article en page(s) : p. 292-301 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Cuirs et peaux -- Propriétés mécaniques
Cuirs et peaux -- Propriétés organoleptiques
Qualité -- Contrôle
Tannage
Wet-blue (tannage)Peau tannée au chrome (le chrome donne une couleur bleue)Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Various factors control the quality of the raw materials (hides/skins) used for leather processing. Leathers made from such varied quality of raw materials also have very varied grading. Leathers of higher grades are processed conventionally and finished to the desired effect and the required end product. However, processing and manufacturing of lower grade leathers and improving their properties to make them more useful for high quality products is a big challenge for the leather industry. Conventional up-grading of low quality leathers is brought about by surface modifications. However, such surface modifications significantly affect the natural look of the leathers and hence find use in products applications of low value. This study attempted to improve the grade of the leathers by suitably modifying the post tanning operations without affecting the natural feel of the leathers. One of the major defects, thin substance, has been selected for up-grading. The post tanning auxiliaries have been selected so as to enhance the substance of the leather. Different types of leathers (upper, glove and lining) were made from thin substance raw material. The physical strength properties of these leathers match that of the conventionally processed leathers. The organoleptic properties of the leathers made in this study are also on par with that of the conventional leathers. The cost of chemicals can be easily offset with the additional value realized by following this process of up-grading. Note de contenu : - EXPERIMENTAL : Post tanning operations - Physical testing of leather samples - Evaluation of organoleptic properties - Wet and dry rub fastness - Scanning electron microscopic analysis
- RESULTS AND DISCUSSION : Syntans - Fatliquors - Up-grading in thin substance - Physical strenght characteristics, organoleptic properties and rub fastness measurements
- TABLE I : Process recipe for upper leather from wet blue this substance
- TABLE II : Process recipe for lining leather from wet blue thin substance
- TABLE III : Process recipe for glove leather from wet blue thin substance
- TABLE IV : Comparison of post tanning chemicals for conventional and experimental upper leathers from wet blue thin substance
- TABLE V : Comparison of post tanning chemicals for conventional and experimental lining leathers from this substance
- TABLE VI : Comparison of post tanning chemicals used for conventional and experimental glove leathers from wet blue thin substance
- TABLE VII : Up-grading achieved for different types of leathers from wet blue thin substance
- TABLE VIII : Physical strength characteristics of various leathers made from wet blue thin substance
- TABLE IX : Rub fastness characteristics of various leathers made from wet blue thin substanceEn ligne : https://drive.google.com/file/d/15fJ2XqIbS4KAmKqlT25tLn-FTj0ZMQJR/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16060
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CVII, N° 9 (09/2012) . - p. 292-301[article]Réservation
Réserver ce document
Exemplaires (2)
Code-barres Cote Support Localisation Section Disponibilité 14267 - Périodique Bibliothèque principale Documentaires Disponible 14209 - Périodique Bibliothèque principale Documentaires Disponible Raman and ATR-FTIR spectroscopy towards classification of wet blue bovine leather using ratiometric using ratiometric and chemometric analysis / Megha Mehta in JOURNAL OF LEATHER SCIENCE AND ENGINEERING, Vol. 2 (Année 2020)
[article]
Titre : Raman and ATR-FTIR spectroscopy towards classification of wet blue bovine leather using ratiometric using ratiometric and chemometric analysis Type de document : texte imprimé Auteurs : Megha Mehta, Auteur ; Rafea Naffa, Auteur ; Catherine Maidment, Auteur ; Geoff Holmes, Auteur ; Mark Waterland, Auteur Année de publication : 2020 Article en page(s) : 15 p. Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse multivariée
Cuirs et peaux -- Analyse
Cuirs et peaux -- Défauts
Cuirs et peaux de bovins
Réflexion totale atténuée
Spectroscopie Raman
Wet-blue (tannage)Peau tannée au chrome (le chrome donne une couleur bleue)Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : There is a substantial loss of value in bovine leather every year due to a leather quality defect known as “looseness”. Data show that 7% of domestic hide production is affected to some degree, with a loss of $35 m in export returns. This investigation is devoted to gaining a better understanding of tight and loose wet blue leather based on vibrational spectroscopy observations of its structural variations caused by physical and chemical changes that also affect the tensile and tear strength. Several regions from the wet blue leather were selected for analysis. Samples of wet blue bovine leather were collected and studied in the sliced form using Raman spectroscopy (using 532 nm excitation laser) and Attenuated Total Reflectance - Fourier Transform InfraRed (ATR-FTIR) spectroscopy. The purpose of this study was to use ATR-FTIR and Raman spectra to classify distal axilla (DA) and official sampling position (OSP) leather samples and then employ univariate or multivariate analysis or both. For univariate analysis, the 1448 cm− 1 (CH2 deformation) band and the 1669 cm− 1 (Amide I) band were used for evaluating the lipid-to-protein ratio from OSP and DA Raman and IR spectra as indicators of leather quality. Curve-fitting by the sums-of-Gaussians method was used to calculate the peak area ratios of 1448 and 1669 cm− 1 band. The ratio values obtained for DA and OSP are 0.57 ± 0.099, 0.73 ± 0.063 for Raman and 0.40 ± 0.06 and 0.50 ± 0.09 for ATR-FTIR. The results provide significant insight into how these regions can be classified. Further, to identify the spectral changes in the secondary structures of collagen, the Amide I region (1600–1700 cm− 1) was investigated and curve-fitted-area ratios were calculated. The 1648:1681 cm− 1 (non-reducing: reducing collagen types) band area ratios were used for Raman and 1632:1650 cm− 1 (triple helix: α-like helix collagen) for IR. The ratios show a significant difference between the two classes. To support this qualitative analysis, logistic regression was performed on the univariate data to classify the samples quantitatively into one of the two groups. Accuracy for Raman data was 90% and for ATR-FTIR data 100%. Both Raman and ATR-FTIR complemented each other very well in differentiating the two groups. As a comparison, and to reconfirm the classification, multivariate analysis was performed using Principal Component Analysis (PCA) and Linear Discriminant Analysis (LDA). The results obtained indicate good classification between the two leather groups based on protein and lipid content. Principal component score 2 (PC2) distinguishes OSP and DA by symmetrically grouping samples at positive and negative extremes. The study demonstrates an excellent model for wider research on vibrational spectroscopy for early and rapid diagnosis of leather quality. Note de contenu : - EXPERIMENTAL : Sample preparation - Data acquisition and spectral processing
- RESULTS AND DISCUSSION : Peaks of interest - Univariate analysis - Multivariate analysis
- Table 1 : Raman and infrared spectroscopic band assignments for Wet Blue leather
- Table 2 : Raman band assignments distinguishing loose and tight wet blue leather
- Table 3 : Deconvoluted amide I band assignments for protein secondary structures
- Table 4 : Confusion matrix for Raman univariate analysis
- Table 5 : Confusion matrix for IR univariate analysis
- Table 6 : Confusion matrix for the classification of OSP and DA based on the PCA-LDA modelDOI : 10.1186/s42825-019-0017-5 En ligne : https://link.springer.com/content/pdf/10.1186/s42825-019-0017-5.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37139
in JOURNAL OF LEATHER SCIENCE AND ENGINEERING > Vol. 2 (Année 2020) . - 15 p.[article]Raman spectroscopy of wet blue bovine leather / Dennis C. Shelly in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CIV, N° 1 (01/2009)
[article]
Titre : Raman spectroscopy of wet blue bovine leather Type de document : texte imprimé Auteurs : Dennis C. Shelly, Auteur Année de publication : 2009 Article en page(s) : p. 9-16 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Spectroscopie Raman
Wet-blue (tannage)Peau tannée au chrome (le chrome donne une couleur bleue)Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : A comprehensive, multi-instrument Raman spectroscopic study of wet blue bovine leather was performed in order to detect the weak, low frequency, organo-chromium vibrations in chrome tanned leather. Raman scattering spectroscopy is a complementary measurement to infrared absorption spectroscopy. Both types of vibrational spectroscopies theoretically enable the direct measurement of chromium-collagen interactions. Wet blue bovine leather was studied in two forms, slices and powder, by several different instruments (dispersive, Fourier Transform and holographic spectrometer). This paper is an overview of the instrumental and sampling requirements for high quality spectral measurements of this unique sample type. Observed peaks and spectral features are discussed. Implications for protein microstructure and process analysis applications are presented. En ligne : https://drive.google.com/file/d/10-mWaMPEzmKsCgDFe_o1r_iV0QK8AxMn/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3250
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CIV, N° 1 (01/2009) . - p. 9-16[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 010993 - Périodique Bibliothèque principale Documentaires Disponible Rapid fiber opening process for skins : an approach for fail-safe chemical-free process / Jayanthi Durga in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CX, N° 1 (01/2015)
[article]
Titre : Rapid fiber opening process for skins : an approach for fail-safe chemical-free process Type de document : texte imprimé Auteurs : Jayanthi Durga, Auteur ; Ammasi Ranjithkumar, Auteur ; Ramakrishnan Ramesh, Auteur ; Chellan Rose, Auteur ; Chellappa Muralidharan, Auteur Année de publication : 2015 Article en page(s) : p. 7-12 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Carbohydrases
Cuirs et peaux -- Analyse
Cuirs et peaux de chèvres
Epilage enzymatique
Travail de rivière (cuir)
Wet-blue (tannage)Peau tannée au chrome (le chrome donne une couleur bleue)Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Conventional beamhouse operations adopted by the global tanning industry are coming under the close scrutiny of the environmentalists on account of the possible adverse effect on human health and environment. Lime, which is used to the tune of about 10% on the weight of the raw hides and skins, in re-liming stage contribute to generation of large quantities of sludge, the disposal of which is a serious concern. Also the process duration to achieve the required fiber opening in the re-liming process is very long, ranging from 24-72 hrs for different substrates and end products. Enzyme based beamhouse processes are being advocated to overcome the problems associated with the conventional processes. However, enzyme based methods need greater control over process parameters to achieve satisfactory results in leather processing and avoid damage to the pelt. To overcome the problems associated with the conventional re-liming process, an attempt has been made in the present investigation to utilize cocktail of carbohydrases for fiber opening of hides and skins. Fiber opening at optimized concentration of the above enzyme has been studied for its efficiency on goatskins. A process using optimum quantity of enzyme led to fiber opening in 30 minutes. The efficacy of enzyme on rapid fiber opening of dehaired skin was studied at different experimental conditions of pH, time and enzyme concentration. The performance of the enzyme in the given experimental conditions was assessed by quantifying the removal of carbohydrate and proteoglycan and examining the fiber opening by scanning electron microscopic studies. Effect of enzyme on the final quality of the leather was evaluated by changes in chemical characteristics, physical properties and visual examination. Note de contenu : - EXPERIMENTAL : Optimization of enzyme concentration - pH optimization - Time course study - Carbohydrate assay - Estimation of proteoglycan - Scanning electron microscopic analysis - Physical testing and visual assessment
- RESULTS AND DISCUSSION : Effect of enzyme concentration of fiber opening - Effect of pH on fiber opening - Effect of time on fiber opening - Chromium content of wet blue leather - Scanning electron micrography - Physical and organoleptic propertiesEn ligne : https://drive.google.com/file/d/1exmz-jTGm0C0NTh0WpzBYlQtS-Ni_g4y/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=22791
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CX, N° 1 (01/2015) . - p. 7-12[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 16774 - Périodique Bibliothèque principale Documentaires Disponible A rapid method for measuring elastin degradation and its application in leather manufacturing / Xu Zhang in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXV, N° 8 (08/2020)
PermalinkRe-utilisation of biomass resources : preparation and application of a bio-polymer retanning agent based on cattle hair hydrolysate / Luo Jianxun in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 104, N° 1 (01-02/2020)
PermalinkPermalinkReduction of waste chrome levels in tannery wastewater : Optimized recycling / A. Crispim in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 90, N° 6 (11-12/2006)
PermalinkRetanning performance of carboxymethyl starch and its effects on dyeing / Cigdem Kilicarislan Ozkan in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVII, N° 2 (02/2022)
PermalinkSeeking soft leathers with a tight grain / David Rabinovich in WORLD LEATHER, Vol. 14, N° 5 (08-09/2001)
PermalinkPermalinkSome properties of wet-blue leathers produced from recycled chrome tanning liquors / John R. Barlow in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 61, N° 2 (03-04/1977)
PermalinkSome properties of wet-blue leathers produced from recycled chrome tanning liquors / John R. Barlow in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 61 et 62 (Années 1977 et 1978)
PermalinkStudies on solubilized sulfur dyes for coloring leather / R. Venba in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CX, N° 6 (06/2015)
PermalinkStudies on the ethiopian camel hides for their suitability for making leather / M. Belay in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIV, N° 2 (02/2019)
PermalinkStudies on the use of bi-functional enzyme for leather making / Gladstone Christopher Jayakumar in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXI, N° 12 (12/2016)
PermalinkA study on characteristics of lightweight split leather using foam technology / Eun-Chul Shin in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 107, N° 2 (03-04/2023)
PermalinkStudy on reutilization of wet-blue leather wastes for the production of regenerated leather composite / Cheng Qian in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CIX, N° 11 (11/2014)
PermalinkStudy on the microstructure of crocodylus niloticus skins during leather making process / Qiang Tao-Tao in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIV, N° 3 (03/2019)
Permalink