abstract |
Means comprising, in a carrier, a combination of specific sulfinic acid derivatives of the formula (I), wherein M is a hydrogen atom or one equivalent of a mono- or polyvalent cation, R is derived from a peptide or is a radical according to one of the formulas (II) to (VI), (For the meaning of the remaining substituents see claim 1) containing at most a Sulfitenmenge of 1.5 wt .-%, allow improved discoloration of colored substrates without darkening of the decolored substrate. The substrate structure is protected during the Entfärbevorgangs. |