A multi-component packaging unit (kit-of-parts) for the reductive decolorization of dyed keratinic fibers, which unit includes, packaged separately from one another,a container (A) containing a solid or powdered cosmetic agent (a) anda container (B) containing an aqueous cosmetic agent (b),wherein the agent (a) in container (A)(a1) includes one or more sulfinic acid derivatives from a specific group and the agents (a) and (b) are substantially free from metal salts.Also, a method for the reductive decolorization of dyed keratinic fibers with use of the multi-component packaging unit.
