Multi-component packaging units for reductively decoloring dyed keratin fibers and methods for reductively decoloring dyed keratin fibers are provided herein. In an embodiment, a multi-component packaging unit for reductively decoloring dyed keratin fibers includes a container (A) that includes a cosmetic agent (a) and a container (B) that includes a cosmetic agent (b), which are produced separately from each other. Agent (a) in container (A) includes one or more sulfur-containing reductants. Agent (b) in container (B) includes one or more metal salts chosen from the group of tin(II) salts, iron(II) salts, manganese(II) salts, titanium(II) salts, or titanium(III) salts.
