To improve the fastness dyes and basic dyes applied with the printing substrates containing hydroxyl groups

摘要

The invention relates to a process in order to improve the fastness dyes and basic dyes applied with the printing substrates containing hydroxyl groups. According to this method is applied a basic dye on the substrate and the substrate is subjected to a processing simultaneous or has a post - treatment with a fixing agent constituted by a first - condensate or a mixture of: a.le product of reaction of an amine with the cyanamide, dicyandiamide, guanidine or the biguanide; or quaternary b.une polyalkylene polyamine with formaldehyde c; and or d.un derivative n - methylolated optionally, with e.un catalyst. The substrate thus treated can then be subjected to a heat treatment.