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What are they?
Dyes are essential components to colour textiles. They can be classified by the solubility, chemical composition and dyeing process. Disperse dyes are sparingly soluble in water and they are dispersed into fibres rather than fully dissolved in water to proceed the dyeing process. Disperse dyes can be used to dye certain man-made fibres by applying various techniques e.g. direct application, direct disperse in water with the aid of organic carriers.
Textiles containing allergenic disperse dyes can induce contact dermatitis. These dyes are considered as allergic for example, Disperse Blue 124, Disperse Blue 106 and Disperse Yellow 3 which are most problematic ones. Some of the dyes are potentially carcinogenic e.g. Disperse Blue 1. Even though these dyestuffs are not restricted in many countries, it is an industry practice for manufacturers not to use such kind of dyes in textiles.
Commonly found in:
In order to achieve effective colouring, the affinity between the dyes and fibres are one of the critical factors. Disperse dyes are suitable to dye polyester, acetate and polyamide but it is not applicable to cotton.
Related legislation (non-exhaustive)
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