Direct Dyeing of Jute: Effect of Cationic Treatments on Color Fastness (original) (raw)
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Application of basic dyes on Hessian jute fabrics and its fastness analyses
The object of this study is the application of basic dyes on jute fabrics at different temperature and fastness analyses of dyed jute fabric. Hessian jute fabric is collected from jute weaving mill then jute fabric is undergone pretreatment process. Pretreated jute fabric is dyed with basic dyes at various shade percentage such as-5%, 2%, 4%,5% shade variation at different temperature. Then fastness property is analyses by color fastness to wash, color fastness to rubbing, color fastness to light. It showed that at 65oC temperature and 4% shade variation basic dyes gives good color fastness on hessian jute fabrics.
2015
Conventional mill bleached jute fabric was treated with soya bean seed extracted mixed natural amino acids. Colour interaction parameters including surface colour depth as well as whiteness index, yellowness index and brightness index were assessed for application of selective reactive dyes on such chemically modified jute. Also, textile related important physical properties has been compared between control bleached and modified jute. It was observed that treatment with soya extracted natural mixed amino acids may infuse some amine or aldimine groups on jute polymer leading to cationization of jute and making it better receptive of anionic reactive dyes particularly in non-conventional acidic dye bath even in the absence of salt. Study of surface morphology of said soya extracted amino acid modified jute substrate indicates anchorage of amino acids on jute surface. Corresponding reaction mechanism for such modification was supported with FTIR spectroscopy data.
Effects of Cationizer on Different Shade Percentage of Reactive Dye for Dyeing Cotton Knit Fabric
2019
This research is mainly focusing on the influence of cationizer on color fastness and shade variation of cotton fabric dyed with bi-functional reactive dyes. Dyes which have been selected for the study contain both chloro triazine and sulphone reactive groups in the same molecule. After treating the fabric with cationizer, these samples are dyed in two different hues (Red & Blue) at three shade percentage (o.5%, 1.0%, 2.0%) followed by exhaust method. The fastness ratings are compared between the cationizer-free dyed samples and cationizer-treated dyed samples of the respective shade percentage. This experiment has revealed that the dyed fabric treated with cationizer has resulted in a general improvement in wash and rubbing fastness. Not only that, the color strength and color co-ordinate of the all the samples are measured by spectrophotometer to differentiate the cationizer treated samples to only dyed specimen. However, after testing of all samples, it is observed that fabric dy...
Studies on compatibility of selective direct dyes for dyeing of jute fabric
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Compatibility of binary mixture of direct dyes has been studied by conventional method as well as a new simplified andeasier method for application of direct dyes combination on jute, and the findings of both the methods are compared.In conventional method of compatibility test, the study has been made using colorimetric method by comparing ΔC vs ΔLand K/S vs ΔL for two sets of dyed samples, varying time and temperature profile in one set, and dye concentration in secondset for dyeing jute fabric with binary pairs of dyes in equal proportion (50:50). In proposed method of compatibility test, thecolour difference index (CDI) values are calculated for dyed jute fabrics using different proportions of binary mixture ofdyes. Finally, from the difference of maximum CDI and minimum CDI, the relative compatibility rating is judged.In conventional method of compatibility test, Direct Red 12B + Direct Green YG and Direct Green YG + Direct T Blue 2Rcombinations show better compatibility, while...
Dyeability of cationised cotton and nylon 6 fabrics using acid dyes
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Cationisation of cotton and nylon 6 fabrics has been done using Solfix E, Tino fix ECO, Acramine berfix K and cetyl trimethyl ammonium bromide to impart cationic sites on fabric surface for improving their substantivity to acid dyes. Precationisation of cotton and nylon 6 fabrics improves the depth of the colour as well as fastness properties. In all the cases, the overall colour fastness of cationic cotton dyed with acid dyes is found to be comparable to the colour fastness of the nylon 6 dyed with same acid dyes .
2011
Selective pre-mordanting (single and double) and natural dyeing of 6% H 2O2 (50%) bleached jute fabric have been carried out using myrobolan (harda) and metallic salts (patash alum and aluminium sulphate) as mordants and aqueous extract of tesu (palash flower petals) as dyeing agent under varying dyeing condition to optimize the dyeing process variables. It is found that the 20 % myrobolan followed by 20 % aluminium sulphate in sequence is a most potential double pre-mordanting system rather than using them as single mordant separately, considering the results of important textilerelated properties and colour yield. Effects of dyeing process variables (time, temperature, pH, MLR, mordant conc., dye conc., and salt conc.) on surface colour strength have been evaluated to optimize dyeing conditions. Colour fastness to washing, rubbing and light, in general, and dyeing pH sensitivity, in particular, for selective fibre-mordants-dye systems have also been assessed and it is found that d...