A process and composition for removing dye material from keratin fibers, such as human hair, to produce fibers having the desired color shade and which will be stable to oxidation. More particularly, a process for removing dye material, such as oxidative dyes, from human hair by subjecting the fibers to compositions containing dye reducing agents, such as metal sulfoxylate-formaldehyde, urea or thioureas, in combination with a stabilizing agent of the alkali metal bisulfate class. The treated fi...