PROCESS FOR DYEING OR PRINTING A BASIC DYEABLE TEXTILE SUBSTRATE

摘要

Disclosed is a process for dyeing or printing a basic dyeable textile substrate comprising applying thereto,as dyeing or printing agent, a bicationic dis- or trisazo dyestuff which is free from sulphonic acid groups and which contains terminal coupling components, said coupling components being 4-methyl-6-hydroxy-3-N-pyridinium-pyridone-2 radicals, coupled at the 5-position of the pyridone ring.