Novel approaches to the generation of data bases for computer-match prediction in leather dyeing / W. R. Dyson in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXXVI, N° 1 (01/1991)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. LXXXVI, N° 1 (01/1991) . - p. 14-21 Titre : Novel approaches to the generation of data bases for computer-match prediction in leather dyeing Type de document : texte imprimé Auteurs : W. R. Dyson, Auteur ; M. A. Knight, Auteur Année de publication : 1991 Article en page(s) : p. 14-21 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : Instrumental Color Management is now well established for shade passing,as is Computer-Match Prediction(CMP) in finishing.The application of CMP to leather dyeing,however,still poses problems.These include: (i)Inaccurary of data bases derived from laboratory dyeings (ii)The large number of dyes,tannage/retannage systems and application methods in commercial use. (iii)Dyestuff incompatibility e.g., rates of uptake,penetration and chemical interactions between dyes. Color variation due to dyestuff instability and interations has been investigated and has led to the identification of dye combinations which give rise to pack-to-pack color variation and,hence, the failure of CMP systems. Further studies are investigating the development of CMP laboratory-derived data bases which reproduce bulk performance and the reduction of dye inventories to a small number of compatible,substrate-tolerant dyes. En ligne : https://drive.google.com/file/d/1VEgRO1sTxfJ_mtGfEyA1z4G0A6XYfO8r/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=8590 [article]

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The infuence of metal complex dye stability and dye interaction in aqueous solution on within-skin, within-pack and pack to pack colour variation / W. R. Dyson in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 63, N° 1 (01-02/1979)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 63, N° 1 (01-02/1979) . - p. 1-5 Titre : The infuence of metal complex dye stability and dye interaction in aqueous solution on within-skin, within-pack and pack to pack colour variation Type de document : texte imprimé Auteurs : W. R. Dyson, Auteur Année de publication : 1979 Article en page(s) : p. 1-5 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Chélates Chrome Cobalt Colorants -- Stabilité Complexes métalliques Cuirs et peaux -- Teinture Cuivre Fer Ions cuivre Ions métalliques Solutions aqueuses (chimie) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : - Chemical constitution of leather dyes: atomic absorption analysis - Stability of iron complex dyes to EDTA - Stability of iron cpmplex dyes to metal ions - Effect of EDTA and cupric ions on the dyeing performance of iron complex dyes - Effect of sequestrants on chromium, cobalt and copper complexes - Interaction between iron complex and copper complex dyes in aqueous solution Résumé: It has been shown that iron complex and many copper complex dyes are readily decomposed by sequestrants. In addition, iron complex dyes are readily decomposed by cupric ions. Hue changes occur on dye decomposition and these can give rise to unlevelness and colour variation in dyeing. Certain combinations of iron and copper complex dyes are unstable in aqueous solution at 60°C and this can result in pack to pack colour variation. Colour fastness may not be predictable from comparisons of manufacturer's ratings if decomposition has occured. Note de contenu : - Chemical constitution of leather dyes: atomic absorption analysis - Stability of iron complex dyes to EDTA - Stability of iron cpmplex dyes to metal ions - Effect of EDTA and cupric ions on the dyeing performance of iron complex dyes - Effect of sequestrants on chromium, cobalt and copper complexes - Interaction between iron complex and copper complex dyes in aqueous solution En ligne : https://drive.google.com/file/d/1OmU6R0VvyAquCOIP7KrJ2ntUyFruey0m/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30173 [article]

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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]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 57 (Année 1973) . - p. 31-34 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 leathers En ligne : https://drive.google.com/file/d/1prWmQz4UaqO_FC5ZyhqkeZwxLUU1jR7a/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31683 [article]

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