Pad-dry-cure method (Part 2)
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Pad-dry-cure method:-
The dyeing of cotton by impregnation of the fabric with an alkaline solution of a reactive dye followed by infrared heating has been investigated. Infrared dye fixation yields were higher and achieved in much shorter times than dyeings produced by heating the impregnated fabric in air, particularly in cases involving dyes of lower reactivity. Results from continuous dyeing trials showed that the infrared fixation process provided high fixation yields with no visible color variation. Infrared fixation of reactive dyes on cotton could be valuable for reducing the environmental impact of unfixed dyes and dyeing assistants in the dyehouse effluent
