Development of a novel three-dimensional printing technology for the application of "raised" surface features / David M. Lewis in COLORATION TECHNOLOGY, Vol. 137, N° 5 (10/2021)  

[article]  inCOLORATION TECHNOLOGY > Vol. 137, N° 5 (10/2021) . - p. 468-474 Titre : Development of a novel three-dimensional printing technology for the application of "raised" surface features Type de document : texte imprimé Auteurs : David M. Lewis, Auteur ; Peter J. Broadbent, Auteur ; Muriel Rigout, Auteur ; Chris M. Carr, Auteur ; Fearne Johnson, Auteur Année de publication : 2021 Article en page(s) : p. 468-474 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Encre d'imprimerie Impression jet d'encre Impression tridimensionnelle Index. décimale : 667.4 Encres Résumé : A simple procedure to ink-jet print raised images using two water-soluble inorganic inks is reported and it has the potential to be utilised in domestic and commercial environments. The advantages of such a procedure lies in the ability to print moulded objects, Braille type and to engineer special gonio-specific effects that may have value in the security printing area. The study focuses on printing gypsum through the ready precipitation of calcium sulphate dihydrate by co-jetting calcium chloride and ammonium sulphate solutions. The results in this preliminary study are encouraging and offer a potential method for durable surface structuring of material surfaces with haptic and visual effects for both the blind and the sighted. Note de contenu : - Concurrent cartridge printing - Sequential cartridge printing - Braille printing - Smart printing DOI : https://doi.org/10.1111/cote.12541 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12541 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36490 [article]

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Investigation into the dyeing of wool with Lanasol and Remazol reactive dyes in seawater / Peter J. Broadbent in COLORATION TECHNOLOGY, Vol. 134, N° 2 (04/2018)  

[article]  inCOLORATION TECHNOLOGY > Vol. 134, N° 2 (04/2018) . - p. 156-161 Titre : Investigation into the dyeing of wool with Lanasol and Remazol reactive dyes in seawater Type de document : texte imprimé Auteurs : Peter J. Broadbent, Auteur ; Chris M. Carr, Auteur ; Muriel Rigout, Auteur ; Naraindra Kistamah, Auteur ; Jennita Choolun, Auteur ; C. Lakshmi Radhakeesoon, Auteur ; M. Abbas Uddin, Auteur Année de publication : 2018 Article en page(s) : p. 156-161 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colorants réactifs Couleur -- Analyse Eau de mer Filtration Laine Teinture -- Fibres textiles Index. décimale : 667.3 Teinture et impression des tissus Résumé : Freshwater is an increasingly scarce resource that is extensively used in textile wet‐processing. In seeking to identify alternative low freshwater‐usage coloration technology, this study examined the potential use of seawater (SEAW) as the dyeing medium for wool coloration using a range of reactive dyes. Initially, the dyeing behaviour of the wool fabric in simulated seawater (SSW) was compared with conventional dyeing from distilled water (DW) using α‐bromoacrylamide‐based Lanasol dyes and sulphatoethyl sulphone‐based Remazol dyes. These preliminary studies demonstrated that comparable coloration could be achieved in the SSW medium based on an assessment of the dye exhaustion, dye fixation, colour yield and levelness. Subsequent dyeing studies of wool using Mauritian seawater with both the Lanasol and Remazol reactive dyes confirmed that, based on the dye exhaustion, dye fixation, colour yield and levelness, comparable coloration could be achieved, highlighting the possibility of substituting freshwater with seawater as the dyeing medium. Note de contenu : - Materials - Simulated seawater composition - Wool dyeing - Colour analysis - Seawater filtration DOI : 10.1111/cote.12329 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12329 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30321 [article]

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Investigation into the effect of a plant-derived stabiliser on the light and wash fastness of sulphur-dyed cotton and nylon fabrics / Peter J. Broadbent in COLORATION TECHNOLOGY, Vol. 136, N° 3 (06/2020)  

[article]  inCOLORATION TECHNOLOGY > Vol. 136, N° 3 (06/2020) . - p. 224-230 Titre : Investigation into the effect of a plant-derived stabiliser on the light and wash fastness of sulphur-dyed cotton and nylon fabrics Type de document : texte imprimé Auteurs : Peter J. Broadbent, Auteur ; Quratulain Mohtashim, Auteur ; Muriel Rigout, Auteur ; Chris M. Carr, Auteur Année de publication : 2020 Article en page(s) : p. 224-230 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). Polyamide 66 Résistance au lavage Soufre Stabilisants à la lumière Teinture -- Fibres textiles Index. décimale : 667.3 Teinture et impression des tissus Résumé : In this study, cotton fabric and nylon fabric were dyed with a range of commercial sulphur dyes and the light and wash fastness of the coloured fabrics was investigated. The effect of after-treating the coloured cotton and nylon fabrics with a tannin-based commercial product, Bayprotect Cl, in the presence or absence of sodium sulphate in the treatment bath, was found to significantly improve the light fastness of the sulphur-dyed cotton, and the photoprotective effect was partially stable to ISO 105-C06 washing. In addition, the tannin-based after-treatment also improved the colour stability of the dyed fabrics to the perborate-based ISO 105-C06 washing. The possible mechanisms for the improved fastness properties are also discussed. The application of sulphur dyes to nylon is potentially commercially useful but has been limited because of the reported poor light fastness of the dyeings. The photoprotective effect of the tannin-based after-treatment was investigated with a view to providing the necessary commercial performance. However, it was established that on this fibre, the light fastness improvement was marginal, and the associated wash fastness to oxidative bleach-based ISO 105-C06 washing was limited. Note de contenu : - Materials - Dyeings - After-treatment with Bayprotect CI - Colour measurement - Determination of fastness properties DOI : https://doi.org/10.1111/cote.12456 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12456 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34295 [article]

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Investigation into the reaction of reactive dyes with carboxylate salts and the application of carboxylate-modified reactive dyes to cotton / David M. Lewis in COLORATION TECHNOLOGY, Vol. 138, N° 1 (02/2022)  

[article]  inCOLORATION TECHNOLOGY > Vol. 138, N° 1 (02/2022) . - p. 58-70 Titre : Investigation into the reaction of reactive dyes with carboxylate salts and the application of carboxylate-modified reactive dyes to cotton Type de document : texte imprimé Auteurs : David M. Lewis, Auteur ; Peter J. Broadbent, Auteur ; Chris M. Carr, Auteur ; Wei D. He, Auteur Année de publication : 2022 Article en page(s) : p. 58-70 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Carboxylate Citrate de sodium Colorants -- Synthèse Colorants réactifs 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). Fixation (chimie) Formiate de sodium Impression jet d'encre Impression sur étoffes Orange (couleur) Teinture -- Fibres textiles Index. décimale : 667.3 Teinture et impression des tissus Résumé : Ink-jet printing of cellulosic fabrics with reactive dyes typically requires that the fabric is pretreated with alkali, prior to printing, to facilitate efficient fixation of the dye. In this paper we evaluate the use of sodium formate and other carboxylate salts as a neutral (pH 6.5) pretreatment process. The thickened, prepared-for-print pad liquor contained at least 50 gdm−3 of the selected carboxylate salt and was applied to the cotton fabrics by a pad-dry procedure. The fabric was then ink-jet printed with reactive dye inks, followed by standard steaming and washing-off processes. The pH of the carboxylate salt pretreatment was 6.5 and the aqueous extracts from the print fabrics at the end of the steaming process remained at pH 6.5. It was observed that even at pH 6.5, in the presence of selected carboxylates, significant reactive dye fixation could be achieved on a cotton substrate, whereas in the absence of the carboxylate, very little or even zero fixation was achieved. Infrared and capillary electrophoresis analyses of model reactions of reactive dyes with the carboxylate salts indicated that reactive ester residues were formed, and which subsequently promoted reaction with the cellulosic substrates. In addition to improving reactive dye fixation in ink-jet printing, the carboxylate-modified dyes were also demonstrated to improve long-liquor dyeing properties on cotton substrates. As an extension of this carboxylate-based printing process, the incorporation of lithium acetate (100 gdm−3) into the ink formulation was further studied and it was demonstrated that the necessity for a preparative pretreatment process could be eliminated. Note de contenu : - EXPERIMENTAL AND METHODS : Materials - Synthesis of a model SES dye - Model SES dye reaction with sodium formate - Model SES dye reaction with sodium citrate - Modification of commercial reactive dyes with sodium formate and sodium citrate - Cotton fabric preparation for subsequent ink- jet printing- Laboratory- ased, ink-jet printing application - Long-liquor dyeing Fixation - FTIR analysis - CE analysis of reactive dyes - RESULTS AND DISCUSSION : Activator evaluation - Ink-jet prints showing the effect of activators - "All-in" system for ink-jet printing with reactive dye-based inks - FTIR analysis of reactive dyes modified with carboxylates - CE analysis of selected commercially available reactive dyes and their carboxylate derivatives - Table 1 : Capillary electrophoresis (CE) analysis of formate- and citrate- modified Remazol Red RB and Remazol Brilliant Orange 3R reactive - Table 2 : Capillary electrophoresis (CE) analysis of formate- modified Cibacron Blue FR and Cibacron Red FB reactive dyes - Table 3 : Fixation and colour yield values following long- liquor dye application of 1%- 2% owf Remazol Red RB dye and carboxylate dye derivatives to cotton fabric - Table 4 : Fixation and colour yield values following long- liquor dye application of 1%- 2% owf Cibacron Red FB dye and carboxylate dye derivatives to cotton fabric DOI : https://doi.org/10.1111/cote.12571 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12571 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37499 [article]

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Investigation into the removal of pigment, sulphur and vat colourants from cotton textiles and implications for waste cellulosic recycling / Pendo Bigambo in COLORATION TECHNOLOGY, Vol. 137, N° 6 (12/2021)  

[article]  inCOLORATION TECHNOLOGY > Vol. 137, N° 6 (12/2021) . - p. 604-614 Titre : Investigation into the removal of pigment, sulphur and vat colourants from cotton textiles and implications for waste cellulosic recycling Type de document : texte imprimé Auteurs : Pendo Bigambo, Auteur ; Chris M. Carr, Auteur ; Mark Sumner, Auteur ; Muriel Rigout, Auteur Année de publication : 2021 Article en page(s) : p. 604-614 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colorants au soufre Les colorants au soufre sont des colorants utilisés pour teindre de façon assez économique des fibres cellulosiques, principalement dans des nuances sombres (noir, brun, bleu foncé). Insolubles à l'état oxydé, ils sont rendus solubles par réduction à la soude caustique pour la teinture, dans un procédé analogue aux colorants de cuve, plus chers. Les colorants s'obtiennent par action du soufre sur des composés organiques, notamment sur le 2-4-dinitrophénol (Sulphur Black 1) ou le toluène-2-4-diamine et la 4-nitroaniline (Sulphur Brown 12). 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). Déchets industriels -- Elimination Déchets industriels -- Recyclage Pigments Récupération (Déchets, etc.) Recyclage (déchets, etc.) Teinture -- Fibres textiles Index. décimale : 667.3 Teinture et impression des tissus Résumé : Cotton can be coloured by dyeing and printing using either dye or pigment colourants. Pigments are insoluble in water but can be dispersed in a polymer print binder and heat-fixed to the fabric. Vat and sulphur dyes similarly have low solubility in water but through alkali/reduction can be solubilised and exhausted onto the cotton fibre. Following their reoxidation, the dyes are insolubilised in the fibre and, like pigment prints, in general exhibit good wash fastness. In this study, sequential acid/alkali/peroxide or acid/dithionite/peroxide treatments were investigated as a means of removing pigment/polymer prints and common sulphur and vat dyes from coloured cotton fabric. Using the sequential acid/dithionite/peroxide treatment, up to 97% of both sulphur and vat colourants could be “stripped” from dyed cotton producing a white cellulosic feedstock material that could be used for “new” fibre regeneration. By contrast, the “stripping” of the pigment/polymer binder colourant system was less predictable and less complete and is probably a reflection of the different chemical natures of the polymer binder and pigments. This contrasting behaviour highlights the range of chemistries applied to cotton and that developing a universal single treatment to strip out all finishes may be problematic. Note de contenu : - EXPERIMENTAL : Materials - Application of pigment print formulation - Dyeing treatments - Acid/alkali treatment of the pigment-printed and dyed cotton - Acid/dithionite treatment of the pigment-printed and dyed cotton - Hydrogen peroxide treatment of the pigment-printed cotton and dyed cotton - Colorimetric analysis - Scanning electron microscopy analysis - RESULTS AND DISCUSSION : Effect of sequential stripping treatments on pigment-printed cotton - Effect of sequential stripping treatments on sulphur-dyed cotton fabrics - Effect of sequential stripping treatments on vat-dyed cotton fabrics DOI : https://doi.org/10.1111/cote.12556 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12556 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36791 [article]

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Novel delayed-cure, durable press, shrink-resist treatment of wool fabrics and garments / Naraindra Kistamah in COLORATION TECHNOLOGY, Vol. 136, N° 4 (08/2020)  

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Supercritical carbon dioxide (SC-CO2) dyeing of cellulose acetate : An opportunity for a "greener" circular textile economy / Peter J. Broadbent in COLORATION TECHNOLOGY, Vol. 139, N° 4 (08/2023)  

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