PROCESS FOR IMPROVING SOLIDITY TO WETTING REACTIVE OR DIRECT DYES ON A CELLULOSIC SUBSTRATE AND CELLULOSIC SUBSTRATE OBTAINED

摘要

The object of the invention is to provide a method for improving solidity in the mildew of reactive or direct dyes on a substrate, which is wholly or partly composed of cellular fibers. According to the method of the invention, a post-treatment agent constituted by the reaction product or a mixture of a polyamine-containing amine compound with an N-methylene compound B or with the same substance is applied to said dyed or printed substrate. FORMALDEHYDE OR A DONAL OF FORMALDEHYDE AND POSSIBLY A CATALYST OF RETICULATION C, THE DYE AND THE POLYBASIC AMINO COMPOUND HAVING BEING CHOSEN IN SUCH A WAY THAT WHEN THEY ARE MIXED IN AQUEOUS SOLUTION THEY PROVIDE A PRECIPITATE WHICH, AFTER WASHING AND DRYING, IS REDUCED NOT IN AQUEOUS ALKALI AT PH12, AT AMBIENT TEMPERATURE. / P