Process for improving the colour yield and wetfastness properties of dyeings or prints produced on cellulosic fabrics with anionic dyes: treatment with cationic imidazole

摘要

The invention relates to a process for improving the color yield and wetfastness properties of dyeings or prints produced on cellulosic materials with anionic dyes. The process comprises treating the cellulosic fabric before, during or after dyeing with a cationic fiber-reactive compound which is the reaction product of an imidazole compound containing in 2-position phenyl or an aliphatic radical of not less than 5 carbon atoms, and an epihalohydrin.