Process for aftertreating cellulosic material dyed with dyes containing acid sulfo groups with salt solution to improve wet fastness and tear strength

摘要

The invention relates to a process for aftertreating cellulosic material which has been dyed with reactive or direct dyes and subsequently treated in an acid bath. The aftertreatment with a solution of an alkali metal salt or alkaline earth metal salt enhances the wetfastness properties and the tear resistance of the cellulosic material.