Agent (A), for reductive decoloration, comprises at least a sulfinic acid derivative (I) in a carrier in combination with a non-ionic surfactant. Agent, for reductive color adjustment, comprises at least a sulfinic acid derivative (I) of formula (MO-SO-R) in a carrier in combination with a non-ionic surfactant. R : a peptide derivative, alkyl compound of formula (R 2>-C(Y 1>)(R 1>)-) (where R 1>and R 2>are not simultaneously H), (M 1>-SO-C(Y 2>)(R 14>)-X-C(Y 1>)(R 1>)-), R 10>-NH-CO-, R 13>-SO 2-NH-C(R 11>)(R 12>)- or a phenyl compound of formula (IV) Y 1>, Y 2>OH, -NH 2group or -NR 3>R 4> R 3>, R 4>2-6C alkenyl, 1-6C (hydroxy)alkyl, 2-6C polyhydroxyalkyl, aryl or aryl-1-6C alkyl X : a direct bond or an organic residue with two free valency either R 1>, R 14>H, 1-6C alkyl or carboxyalkyl-(CH 2) m-COOM 2> and R 2>H, 1-6C alkyl, carboxyalkyl-(CH 2) n-COOM 3>, 1-6C alkyloxycarbonyl, sulfonic acid, carbamoyl, N,N-di(1-6C alkyl)carbamoyl, N,N,N-tri(1-6C alkyl)ammonium-1-6C alkyl, carboxy-2-6C alkenyl, cyano-1-6C alkyl, 1-6C alkoxycarbonyl-1-6C alkyl, aliphatic or aromatic heterocyclic, which is substituted, or (IV) or R 2>R 1>aliphatic 5-7-membered ring containing at least a cationic, quaternary nitrogen atom as a heteroatom, where the cationic load is compensated optionally through an equivalent mono- or polyvalent anions R 7>carboxy group, sulfonic acid group, 1-6C alkoxycarbonyl, sulfonic amid, cyano, nitro, carboxy-1-6C alkyl, carboxy-1-6C alkoxy or an amine group of formula (-N +>RaRbRc) Ra, Rb, Rc : 1-6C alkyl, 2-6C alkenyl, aryl-1-6C alkyl or 1-6C hydroxyalkyl M, M 1>-M 3>H or an equivalent of mono- or polyvalent cation R 8>, R 9>H, 1-6C alkyl, 2-6C alkenyl, 1-6C hydroxyalkyl, 2-6C polyhydroxyalkyl, 1-6C alkoxy, OH, amino, carboxy, nitro, cyano or halo R 10>1-6C alkyl, optionally substituted aryl, optionally substituted heteroaryl, carboxy-1-6C alkyl, carboxy-2-6C alkenyl, 1-6C alkoxycarbonyl or 1-6C alkoxycarbonyl-1-6C alkyl R 11>-R 13>H, 1-6C alkyl, 2-6C alkenyl
