Limitations in predicting dyebath exhaustion using optical spectroscopy / Melih Günay in COLORATION TECHNOLOGY, Vol. 126, N° 3 (2010)  

[article]  inCOLORATION TECHNOLOGY > Vol. 126, N° 3 (2010) . - p. 140-145 Titre : Limitations in predicting dyebath exhaustion using optical spectroscopy Type de document : texte imprimé Auteurs : Melih Günay, Auteur ; Warren J. Jasper, Auteur Année de publication : 2010 Article en page(s) : p. 140-145 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 667.3 Teinture et impression des tissus Résumé : There are practical limitations in predicting dyebath concentrations and dyebath exhaustion using absorbance measurements from optical spectroscopy. The purpose of this paper is to examine the common assumptions of prediction models that cause prediction errors, and especially when multiple dye combinations are used. If a linear model is used to map absorbance to concentration, then five assumptions must hold: measurement repeatability, linear scaling, spectral additivity, linear independence of the constituent spectra and the absence of spectral morphing. Violation of one or more of these assumptions will lead to errors in predicting the concentrations of dyes in a dyebath and subsequent exhaustion calculations. DOI : 10.1111/j.1478-4408.2010.00238.x En ligne : http://onlinelibrary.wiley.com/doi/10.1111/j.1478-4408.2010.00238.x/pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=9458 [article]

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Methods and impact of reducing salt in dyeing cellulose : a case study with CI Direct Blue 90 / Samuel M. Jasper in COLORATION TECHNOLOGY, Vol. 129, N° 5 (10/2013)  

[article]  inCOLORATION TECHNOLOGY > Vol. 129, N° 5 (10/2013) . - p. 385-388 Titre : Methods and impact of reducing salt in dyeing cellulose : a case study with CI Direct Blue 90 Type de document : texte imprimé Auteurs : Samuel M. Jasper, Auteur ; Warren J. Jasper, Auteur Année de publication : 2013 Article en page(s) : p. 385-388 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Fibres cellulosiques sels -- Réduction Teinture -- Fibres textiles Index. décimale : 667.3 Teinture et impression des tissus Résumé : The addition of large amounts of salt is one of the most important environmental problems in the dyeing of cellulosic fibres with direct or reactive dyes. This study was undertaken to determine an accurate and effective method for measuring the impact of salt on the dyeing process. This method has been applied to the case of CI Direct Blue 90 by utilising real-time measurements of dye exhaustion for different salt and dye concentrations. Reductions in salt by a factor of 4 were achieved with no effect on the final shade. It is proposed that this method could be used to reduce the amount of salt for many other direct dyes, or to enable the dyer to quantify the trade-off between time to final exhaustion and salt addition. DOI : 10.1111/cote.12042 En ligne : http://onlinelibrary.wiley.com/doi/10.1111/cote.12042/pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=19360 [article]

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