Treating keratin fibers, comprises applying a coloring agent on the keratin fibers, applying an acid-containing composition on the fibers exposed with the coloring agent, and heating the keratin fibers

摘要

Treating keratin fibers, comprises applying a coloring agent on the keratin fibers, applying an acid-containing composition with a pH-value of less than 7 on the keratin fibers exposed with the coloring agent, and heating the keratin fibers exposed with the coloring agent and the composition. An independent claim is included for a combination product of two separate compositions comprising composition A comprising the coloring agent, and composition B comprising the acid-containing composition.