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The lightfastness of dyestuffs and leathers / Bernd Kahne in WORLD LEATHER, Vol. 15, N° 5 (08-09/2002)
[article]
Titre : The lightfastness of dyestuffs and leathers Type de document : texte imprimé Auteurs : Bernd Kahne, Auteur ; Jurgen Brosi, Auteur Année de publication : 2002 Article en page(s) : p. 53-56 Langues : Anglais (eng) Catégories : Colorants
Cuirs et peaux -- Teinture
Essais accélérés (technologie)
PhotostabilitéIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : Lightfastness, particularly for furniture and garment leathers, is a major issue, and tanners are experiencing more technical problems in leather dyeing than previously encountered.
When grain leathers were finished using pigments, the lightfastness was largely dependent upon the properties of the pigment used. However, today the dyestuff is often the main component for lightfastness.
Demands can vary depending on the intended purpose of the leather. While a lightfastness of grade 3 is sufficient for shoe upper leathers, the market asks for grade 3-4 for garment leathers and, for upholstery, a lightfastness of grade 4. These values apply for both full grain and velour leathers and are influenced by the following factors:
- Dyestuff selection (type/structure).
- Shade depth (dyestuff amount/dye procedure).
- Leather type.
- Characteristics of tannage, retannage and fatliquor.
- Physical and chemical properties of the leather and conditions within dyeing process.Note de contenu : - Lightfastness and the type of dye
- Shade intensity, normed dye intensity (RT), and absorptive ability
- Lightfastness in relation to colour intensity
- Dyeing leathers using combinations of dyestuffs
- The influence of chemicals used in leather manufacture
- The technical issues
- Fig. 1 : Lightfastness related to metal
- Fig. 2 : Standardises normed dye intensities (RT)
- Fig. 3 : The build-up properties of fast acid brown ANP on full chrome and retanned leathers
- Fig. 4 : Lightfastness test IUF - 402
- Fig. 5 : Lightfastness test IUF - 402
- Fig. 6 : The darkening effect of vegetable extracts
- Fig. 7 : The effect of vegetable extracts on colour chromeEn ligne : https://drive.google.com/file/d/1wOTldisePmjccFEK09Q5RW8xFr1u4Wh7/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32268
in WORLD LEATHER > Vol. 15, N° 5 (08-09/2002) . - p. 53-56[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 006180 - Périodique Bibliothèque principale Documentaires Disponible The modification and colouration of leather by graft polymerisation / W. R. Dyson in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 57 (Année 1973)
[article]
Titre : The modification and colouration of leather by graft polymerisation Type de document : texte imprimé Auteurs : W. R. Dyson, Auteur ; M. A. Knight, Auteur ; R. L. Sykes, Auteur Année de publication : 1973 Article en page(s) : p. 31-34 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Acrylates Les monomères acrylates sont un groupe d'esters faisant partie des vinyles, car renfermant une double liaison carbone-carbone et sont utilisés pour former des polyacryliques qui ont de multiples usages.
Colorants
Copolymères greffés
Cuirs et peaux -- Teinture
Cuirs et peaux de chèvres
Cuirs et peaux de moutons
Méthacrylates
Polymérisation par oxydation
Solidité de la couleur
Température de retrait
Vinyle
Wet-blue (tannage)Peau tannée au chrome (le chrome donne une couleur bleue)Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : The chemical fixation of acrylate and methacrylate monomers to wet-blue sheepskins and goatskins in the presence of redox, polymerisation initiators has been investigated. In the presence of such monomers, the concurrent application of an olefinically unsaturated dyestuff and a colourless vinylic monomer gives coloured leathers having a partially fatliquored handle. The effect of several process variables on the fixation of the polymer by the leather are discussed. Note de contenu : - SITE OF GRAFTING
- MATERIALS USED IN EXPERIMENTAL WORK : Substrate - Emulsifier - Dyestuffs
- METHODS : Graft polymerisation procedure - Determination of covalently bound polymer - Fastness properties of the dyed leathers - Shrinkage temperatures
- RESULTS : Factors affecting the amount of monomer bound to leather by grafting - Incorporation of vinylic dyestuffs into the monomer blend - Levelness of dyeing - Fastness properties of the dyed leathers - Effect on shrinkage temperature
- Table 1 : Effect of atmosphere on fixation of monomer (results as a percentage of dry leather weight)
- Table 2 : Effect of float on polymer fixation (ethyl methacrylate on goat skin) (all percentages are based on the weight of the dry leather)
- Table 3 : Polymerisation conditions for incorporation of vinylic dyestuffs (all quantities are based on weight of dry leather)
- Table 4 : Fastness properties of dyed and graft-polymerised leathersEn ligne : https://drive.google.com/file/d/1prWmQz4UaqO_FC5ZyhqkeZwxLUU1jR7a/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31683
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 57 (Année 1973) . - p. 31-34[article]Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 008593 - Périodique Archives Documentaires Exclu du prêt The successful practice of leather dyeing / J. B. Knapton in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 60, N° 5 (09-10/1976)
[article]
Titre : The successful practice of leather dyeing Type de document : texte imprimé Auteurs : J. B. Knapton, Auteur ; H. E. Nursten, Auteur Année de publication : 1976 Article en page(s) : p. 128-132 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colorants
Cuirs et peaux -- Teinture
Procédés de fabricationIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : The aim here is to help make better leather, in particular to be able to dye it better. The difficulties in dyeing can be attributed in part to the leather, in part to the dyes, and in part to the process itself. Relevant points about dyes and about the substrate are therefore first reviewed briefly, and then the process of dyeing is considered, stress being laid particularly on the need to standardise the process as far as possible. Standardising does not mean that all leather should be the same, but that, when a particular type of leather is being produced, variations between batches and between individual pieces within batches are reduced as far as possible. Note de contenu : - The dyes
- Leathers
- Standardisation of the dyeing process : Standardisation of equipment - Standardisation of load - Standardisation of dyes - Choice of dyes - Quality of the water supply - Standardisation of dyeing process - Washing off - Post-dyeing - Control of standardisationEn ligne : https://drive.google.com/file/d/1u4GZG4qlhlY7L_a7MBXWqwERXdhQ9Chn/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34115
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 60, N° 5 (09-10/1976) . - p. 128-132[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 007108 - Périodique Bibliothèque principale Documentaires Disponible The successful practice of leather dyeing / J. B. Knapton in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 60 (Année 1976)
[article]
Titre : The successful practice of leather dyeing Type de document : texte imprimé Auteurs : J. B. Knapton, Auteur ; H. E. Nursten, Auteur Année de publication : 1976 Article en page(s) : p. 128-132 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colorants
Cuirs et peaux -- TeintureIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : The aim here is to help make better leather, in particular to be able to dye it better. The difficulties in dyeing can be attributed in part to the leather, in part to the dyes, and in part to the process itself. Relevant points about dyes and about the substrate are therefore first reviewed briefly, and then the process of dyeing is considered, stress being laid particularly on the need to standardise the process as far as possible. Standardising does not mean that ail leather should be the same, but that, when a particular type of leather is being produced, variations between batches and between individual pieces within batches are reduced as far as possible. Note de contenu : - The dyes
- Leathers
- Standardisation of the dyeing process : Standardisation of equipment - Standardisation of load - Standardisation of dyes - Choice of dyes - Quality of the water supply - Standardisation of dyeing process - Washing off - Post-dyeing operations - Control of standardisation
- Fig. 1 : Stereoscan electron micrograph of the surface of wet chrome leatherEn ligne : https://drive.google.com/file/d/1u4GZG4qlhlY7L_a7MBXWqwERXdhQ9Chn/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35262
in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 60 (Année 1976) . - p. 128-132[article]Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 008596 - Périodique Archives Documentaires Exclu du prêt Thermodynamics of leather dyeing : III. The preparation of chrome-tanned hide powders and their interaction with C.I. Acid Orange 7 / A. T. Atto in JOURNAL OF THE SOCIETY OF LEATHER TRADES' CHEMISTS, Vol. 55, N° 3 (03/1971)
[article]
Titre : Thermodynamics of leather dyeing : III. The preparation of chrome-tanned hide powders and their interaction with C.I. Acid Orange 7 Type de document : texte imprimé Auteurs : A. T. Atto, Auteur ; H. E. Nursten, Auteur Année de publication : 1971 Article en page(s) : p. 84-103 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colorants acides
Cuirs et peaux -- Teinture
Entropie (thermodynamique)
Orange (couleur)
Poudre de peaux
Tannage au chrome
ThermodynamiqueIndex. décimale : 675 Technologie du cuir et de la fourrure Résumé : A procedure has been developed for chrome-tanning hide powder and it has been used to prepare a range of chrome-tanned hide powders with increasing chrome contents. The interaction of these tanned hide powders with the pure dye acid of C.I. Acid Orange 7 has been studied thermo-dynamically. The saturation capacity of the tanned hide powder for the acid dye increases almost linearly with the amount of chromium present, a chrome oxide content of about 3 % leading to a saturation capacity about twice that of untanned hide powder. The saturation capacities can be sur¬prisingly large, rising to almost three molecules dye bound per chromium atom. Chrome-tanned hide powder has been found to have a lower affinity for the acid dye than untanned, which is connected with the much larger satura¬tion capacity and the consequently lower activity in the fibre produced by a given amount of dye on the hide powder. The affinity at 60°c is independent of minor differences in tannage, but decreases with increasing amounts of chromium. The affinity increases with temperature in the range 25-75°c, while the saturation capacity decreases. Ageing chrome-tanned hide powder does not affect the affinity, but decreases somewhat the saturation capacity. Dyeing chrome-tanned hide powder appears to be exothermic and the entropies of dyeing are positive, the process thus being thermodynamically similar to dyeing untanned hide powder. Note de contenu : - Preparation of a number of batches of chrome-tanned hide powder (A) C20 hide powder
- (B) ATA hide powder, Batch 1
- (C) ATA Hide powder, Batch 2
- (D) ATA hide powder (relatively very low chrome content) batch 3a
- (E) ATA hide powder (relatively High chrome content), Batch 3b
- Analysis of the tanned hide powders
- Purification and analysis of the dye used
- Dyeing
- Reversibility of dyeing
- Table 1 : Analysis of the tanned hide powders
- Table 2 : Experimental data and quantities calculated therefrom
- Table 3 : Saturation capacities of some chrome-tanned hide powders for C.I. Acid Orange 7
- Table 4 : Affinity of C.I. Acid Orange 7 for some chrome-tanned hide powders
- Table 5 : Variation of affinity of C.I. Acid Orange 7 for chrome-tanned hide powder with chrome content
- Table 6 : Comparison of the activity of C.I. Acid Orange 7 in tanned and untanned hide powder
- Table 7 : Heats and entropies of dyeing of some chrome-tanned hide powders with C.I. Acid Orange 7Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35668
in JOURNAL OF THE SOCIETY OF LEATHER TRADES' CHEMISTS > Vol. 55, N° 3 (03/1971) . - p. 84-103[article]Réservation
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Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 007091 - Périodique Bibliothèque principale Documentaires Disponible Thermodynamics of leather dyeing / A. T. Atto in JOURNAL OF THE SOCIETY OF LEATHER TRADES' CHEMISTS, Vol. 55, N° 5 (05/1971)
PermalinkTone in tone dyeing : attempt to use dye encapsulated silica nanospheres in leather dyeing / Sathya Ramalingam in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIII, N° 12 (12/2018)
PermalinkTreatments to enhance properties of chrome-free (wet white) leather / Maryann M. Taylor in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CVI, N° 2 (02/2011)
PermalinkTwo stage leather dyeing - A novel approach to minimize the dye discharge in the effluent / N. Vedaraman in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CVI, N° 6 (06/2011)
PermalinkUpgrading of rural garad-tanned crust leathers / A. E. Musa in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 96, N° 1 (01-02/2012)
PermalinkUtilisation des extraits tinctoriaux en tannerie / J.-J. Rodier in REVUE TECHNIQUE DES INDUSTRIES DU CUIR, Vol. LXIII (Année 1971)
PermalinkVegetable tanning material for tanning, retanning, and coloring of leather / Ali Musa / Saarbrücken [Germany] : Lambert Academic Publishing (2013)
PermalinkWater based finishes / John J. McCarthy in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXII (Année 1977)
PermalinkWet processing upholstery enhancement through technique / R. Kraus in WORLD LEATHER, Vol. 7, N° 1 (02/1994)
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