Developing the methodology of colour gamut analysis and print quality evaluation for textile ink-jet printing : Delphi method / Yi Ding in COLORATION TECHNOLOGY, Vol. 134, N° 2 (04/2018)  

[article]  inCOLORATION TECHNOLOGY > Vol. 134, N° 2 (04/2018) . - p. 135-147 Titre : Developing the methodology of colour gamut analysis and print quality evaluation for textile ink-jet printing : Delphi method Type de document : texte imprimé Auteurs : Yi Ding, Auteur ; Lisa Parillo-Chapman, Auteur ; Harold S. Freeman, Auteur Année de publication : 2018 Article en page(s) : p. 135-147 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colorimétrie Delphi, Méthode La méthode de Delphes est une méthode de prévision, utilisée en particulier en gestion de projet ou en prévision économique. Le principe de cette méthode est que des prévisions réalisées par un groupe d'experts structuré sont généralement plus fiables que celles faites par des groupes non structurés ou des individus. Impression jet d'encre Qualité -- Contrôle Teinture -- Fibres textiles Index. décimale : 667.3 Teinture et impression des tissus Résumé : This research used the Delphi method to investigate current colour gamut analysis methods, which is a critical component of colour management systems (CMS). Thirteen ink‐jet printing experts were interviewed to understand how they manage colour and their process for analysing and comparing colour gamut. A significant result of this study was the development of a four‐stage process model for colour gamut analysis and print quality evaluation for textile ink‐jet printing. The optimal process model was verified and approved by experts. This study uncovered an industry initiative toward the improvement of CMS for more accurate colour matching, a need to stabilise variables in the manufacturing process, and a need to standardise related tests and evaluations. The study also revealed new CMS software and technologies developed for ink formulation and pre‐/post‐treatment methods to facilitate high quality production in textile ink‐jet printing. Note de contenu : - MATERIALS AND METHODS : Methodology - Research objectives - Experiment procedures - RESULTS AND DISCUSSION : Stage one - Stage two - Linearisation and calibration - Stage free DOI : 10.1111/cote.12319 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12319 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30318 [article]

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Mordant dye application on cotton : optimisation and combination with natural dyes / Yi Ding in COLORATION TECHNOLOGY, Vol. 133, N° 5 (10/2017)  

[article]  inCOLORATION TECHNOLOGY > Vol. 133, N° 5 (10/2017) . - p. 369-375 Titre : Mordant dye application on cotton : optimisation and combination with natural dyes Type de document : texte imprimé Auteurs : Yi Ding, Auteur ; S. Freeman, Auteur Année de publication : 2017 Article en page(s) : p. 369-375 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colorants Coton Le coton est une fibre végétale qui entoure les graines des cotonniers "véritables"(Gossypium sp.), un arbuste de la famille des Malvacées. Cette fibre est généralement transformée en fil qui est tissé pour fabriquer des tissus. Le coton est la plus importante des fibres naturelles produites dans le monde. Depuis le XIXe siècle, il constitue, grâce aux progrès de l'industrialisation et de l'agronomie, la première fibre textile du monde (près de la moitié de la consommation mondiale de fibres textiles). Mordançage (teinture) Produits naturels Teinture -- Fibres textiles Index. décimale : 667.3 Teinture et impression des tissus Résumé : It is well known that cotton fibres can be dyed through the formation of coordinate bonds involving cellulose chains, mordants such as alum, and natural dyes such as alizarin. Similarly, synthetic dyes known as mordant acid dyes can be used to dye wool fibres. Unlike mordant dyes on wool, the fastnesses of natural dyes on cotton are often low. Although concerns surrounding textile sustainability have sparked renewed interest in the use of natural dyes, extensive replacement of synthetic dyes with natural dyes is neither practical nor fundamentally possible. However, similarities in dyeing methods using mordant and natural dyes raise the possibility of using mordant dyes as alternatives to natural dyes in the dyeing of cotton. Further, the potential for combining suitable dyes from these two classes to expand the colour gamut currently available from natural dyes on cotton seem worthy of exploration. The results of this study indicate that shades comparable with those produced by natural dyes can be obtained on cotton using select mordant dyes following Fe2+ and Al3+ pretreatments. The best results were obtained using a two-step/two-bath process and dyes such as CI Mordant Blue 13 and CI Mordant Orange 6. In evaluations of mordant and natural dye combinations using the two mordant dyes logwood and Osage orange as prototypes, interesting fabric shades were obtained. However, the fastness properties of these dyes must be improved in order to produce commercially viable dyeings. Note de contenu : - EXPERIMENTAL : Materials - Optimised dyeing procedure for natural dyes and mordant dyes - Combination dyeing with mordant and natural dyes - Measurements - RESULTS AND DISCUSSION : Mordant dye trials - Optimised dyeing procedure for mordant and natural dyes - Mordant and natural dye combinations DOI : 10.1111/cote.12288 En ligne : https://drive.google.com/file/d/14GtIlb6NjA_JSYwd033x0NalU5KrUXSW/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29195 [article]

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Pretreatment effects on pigment-based textile inkjet printing – colour gamut and crockfastness properties / Yi Ding in COLORATION TECHNOLOGY, Vol. 135, N° 1 (02/2019)  

[article]  inCOLORATION TECHNOLOGY > Vol. 135, N° 1 (02/2019) . - p. 77-86 Titre : Pretreatment effects on pigment-based textile inkjet printing – colour gamut and crockfastness properties Type de document : texte imprimé Auteurs : Yi Ding, Auteur ; Renzo Shamey, Auteur ; Lisa Parillo-Chapman, Auteur ; Harold S. Freeman, Auteur Année de publication : 2019 Article en page(s) : p. 77-86 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colorimétrie Coton Le coton est une fibre végétale qui entoure les graines des cotonniers "véritables"(Gossypium sp.), un arbuste de la famille des Malvacées. Cette fibre est généralement transformée en fil qui est tissé pour fabriquer des tissus. Le coton est la plus importante des fibres naturelles produites dans le monde. Depuis le XIXe siècle, il constitue, grâce aux progrès de l'industrialisation et de l'agronomie, la première fibre textile du monde (près de la moitié de la consommation mondiale de fibres textiles). Essais dynamiques Flexion (mécanique) Impression jet d'encre Impression sur étoffes Pigments Polyesters Polyéthylène téréphtalate Résistance au chocs Spectrométrie de masse à ionisation secondaire Surfaces -- Analyse Teinture -- Fibres textiles Index. décimale : 667.3 Teinture et impression des tissus Résumé : The application of two commercial pretreatment agents, formulated to improve the performance of a six‐colour nano‐scale pigment ink set during the textile inkjet printing of cotton and polyester (PET) fabrics, was examined. An industrial scale printer, operating at 55 linear m/h and equipped with Kyocera printheads, was used to print on commercial fabrics (180 cm wide) prepared for digital printing. The work employed an industrial scale rather than a benchtop printer to enhance the utility of the results for a commercial environment. The colorimetric attributes of printed fabrics were recorded for the individual inks as well as for spot colour combinations generated using Dr. Wirth RIPMaster v11 software. Colour table profiles were also generated and the colorimetric values of inks were compared. Colour gamuts of inks on cotton and PET, including three‐dimensional volumes in the CIELab space, were examined to assess the role of pretreatment on the colorimetric properties of the printed substrates. It was found that the pretreatments enhanced the ink receptiveness, colour intensity and colour gamut of fabrics. Pretreatment of cotton resulted in a larger gamut and more vivid colours than on PET. However, wet and dry crockfastness results were found to be low. In this regard, Time‐of‐Flight Secondary Ion Mass Spectrometry analysis of fabrics printed in the presence and absence of pretreatment indicated that the low crockfastness arises from higher pigment levels on the surface of the pretreated fabric. Note de contenu : - EXPERIMENTAL : Materials and methods - Colour measurements, profile creation and colour gamut evauation - Crockfastness testing - Surface analysis by time-of-flight secondary ion mass spectrometry - RESULTS AND DISCUSSION : Colour measurement of individual inks - Colour gamut comparisons - Crockfastness assessment - TOF-SIMS analysis DOI : 10.1111/cote.12377 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12377 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31669 [article]

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