Acetate dyes revisited: High fastness dyeing of cellulose diacetate and polyester-polyurethane

Colorants have been formulated from medium to high energy disperse dyes in an attempt to create dyestuffs for diacetate which not only meet existing toxicological regulations, but also build-up well and confer good wet fastness. Comparison of the performance of the formulations with that of conventional low energy disperse dyes, considered allergenic by Oeko-tex Standard 100, showed the former to have acceptable dyeability and superior fastness on 100% diacetate and an acetate-nylon mix. Some of the formulations also proved suitable for low temperature dyeing of a polyester-elastane blend, all furnishing dyeings with better wash fastness than that generally given by conventional polyester colorants.