Patent ID: 8349023

Claim:
Cosmetic post-treatment agent for improving the washing fastness of coloring processes produced on hair and for color fixing, comprising, in a cosmetic carrier: at least one acetylpyridinium derivative of formula (I), wherein R1 is a C 1 to C 6 alkyl group, a C 2 to C 6 alkenyl group, a C 2 to C 6 hydroxyalkyl group, a C 1 to C 6 alkoxy-C 2 to C 6 alkyl group, a carboxy-C 2 to C 6 alkyl group, an aryl-C 1 to C 6 alkyl group, a heteroaryl-C 1 to C 6 alkyl group, an aryl group, or a heteroaryl group, and X − is a physiologically acceptable anion.