Textile dyeing process

摘要

A textile dyeing process is claimed, in which the absorption and fixing of the dye takes place mainly at constant temp., using the extraction method with a time-dependent shift in the pH of the dye bath from a reaction-inhibiting initial value, and readjusting the used bath to the same initial pH (or a new value) so that the bath can be re-used. The time-dependent pH shift and readjustment of the pH of the used bath are both produced by contacting the bath with a controlled amt. of ion exchange material (I), and the salt(s) (II) required for prodn. of the necessary acid(s) or alkali(s) by ion exchange is/are added to the bath before the start.