Manufacturing and Production

Textile Dyeing and Colour Management

A dyehouse is judged on whether a shade matches and whether it matches again next month, and most of the cost of getting it wrong is in reprocessing that damages the fabric it is trying to save. This course targets right first time. Delegates work through fibre and dye class compatibility, covering reactive, disperse, vat, acid and direct dyes and why a blend needs more than one. Preparation is treated as the decisive step: desizing, scouring, bleaching and mercerising, since uneven preparation guarantees uneven dyeing. Dyeing machinery is covered across jet, winch, jigger, package and continuous ranges, with the liquor ratio and levelling control each requires. Recipe formulation, dispensing accuracy and batch reproducibility follow. Colour measurement is addressed properly: light sources, metamerism, tolerance setting and pass or fail decisions. Fastness testing is covered. Shade correction and the point at which a batch should not be corrected are addressed. The course closes on water, salt and energy cost per kilogram.