Colour fastness of optionally aftertreated acid leveling and milling dyes on nylon 6.6 during washing in an activated oxygen-bleach containing detergent. Part 1: Fading observed in the UK-TP test and after repeated domestic laundering

Previous studies examining the fading exhibited by different classes of cellulosic dyes on cotton, during washing in a oxidative-bleach containing detergent, have been extended to acid leveling and the higher wet fast acid half-milling dyes and acid milling dyes on nylon 6.6. It has been shown that acid leveling dyes exhibit a much higher..

Investigation of the improved dyeability of cationised cotton via photografting with UV active cationic monomers

In this study cotton fabric was photografted with cationic monomers using UV radiation. The dyeability of cationised cotton, in the absence of salt, with three classes of dye (direct, reactive and sulphur dyes) was significantly improved due to the increased ionic attraction between the dyes and the cationic cotton. The colourfastness of ..

UV absorder aftertreatment to improve lightfastness of natural dyes on protein fibres

The effect of a UV absorber on the lightfastness of natural dyes has been investigated. Wool and silk fabrics, dyed with natural dyes with or without mordant, were aftertreated with two UV absorbers. This treatment improved the lightfastness of the mordant-dyed fabric without affecting its colour or shade. The extent of photofading was ev..

Effect of sleeve colour and background colour on change in colour assessments

The two standard grey scales, ISO 105-A02 and ISO 105-A03, used for assessing change in colour and staining, respectively, are both typically provided mounted in black material and within a black sleeve. However, some grey scales are now provided mounted in grey material and within a grey sleeve. This paper reports psychophysical data and..

Examining the effectiveness and the environmental impact of rinsing in reactive dyeing

The effects of temperature, soaping, and neutralization on the washfastness properties of reactive dyestuffs have been studied. A conventional rinsing recipe has been selected along with two other recipes. The modified conventional recipe was similar except all chemicals were omitted. The non-conventional recipe was the same as the modifi..

Lextra? microFibres - Technical breakthrough for 'soft fashion graphics' on clothing and texties

Lextra Microfibre heat transfers have resulted from a three-year development partnership between Chris Kay International and the American Lextra? license Fiberlok. The development is complex and patented and uses millions of ultra-fine microfibres to produce the same high-voltage fibre coating that is employed to make Lextra transfers. A ..

In control: The textile industry takes charge of color in the digital age

Following general remarks on color management along the textile chain and the role of the Internet, various color initiatives from international companies are reviewed. The eWarna platform, suitable for any size of dyeing operation, is described. An integrated package from GretagMacbeth and SheLyn Inc. aids instrument management. New lab ..

Analyzing the dyeing behavior and chromaticity characteristics of polyester microfibers

The dyeing properties of polyester microfibers and regular polyester filaments are studied by measuring the dyeing rates of four disperse dyes, the K/S values, and the color properties of cross-sectional views of the dyed fibers. The research reveals that at 70℃, dye exhaustion of microfibers is very small, meaning that dyeing the fibers..

Dyeing kinetics of wool fabrics pretreated with a protease

Dyeing kinetics of wool fabrics treated with different concentrations of an enzyme of the protease type are studied in this work. Dyeing isotherms with an acid and a premetalised 2:1 dyestuff were carried out and the fit of several kinetic equations to the experimental results determined. The absorption rate constants and activation energ..

Frequently encountered problems in textile wet processing and a diagnostic approach for prevention/solutions

Dyestuff manufacturers are now focused on restricting colours in each class, close to the three primary colours, with similar dyeing characteristics and two objectives. Control mechanisms and automation are discussed, followed by the role of specialty chemicals (four functions noted). Alternate processes are listed and the most common cla..