What is claimed is:
1. A multicomponent packaging unit (kit-of-parts) for reductive decoloration of colored keratin fibers, which comprises, presented separately from one another,
a container (A) containing a cosmetic agent (a) anda container (B) containing a cosmetic agent (b),whereinthe agent (a) in container (A)
(a1) includes one or more sulfinic acid derivatives selected from the...