Patent ID: 7214248

Claim:
A multi-component kit for dyeing and, later on, decolorizing fibers, said multi-component kit containing a dyeing-agent-containing component (A) and a decolorizing component (B), said decolorizing component containing at least one sulfite and said dyeing-agent-containing component (A) containing a composition for dyeing fibers; wherein said composition for dyeing fibers comprises component (A1) containing at least one enamine, or physiologically tolerated salt thereof, and a separate (A2) containing at least one carbonyl compound which are mixed immediately before use, and wherein said at least one enamine is of formula (I): wherein R1 represents an aryl group or an aromatic heterocyclic group, said aryl group having one or more aromatic rings optionally substituted by a C1 to C4 alkyl group, a C1 to C4 hydroxyalkyl group, a hydroxy group, a methoxy group, a dialkylamino group or a halogen group; wherein R2 represents a linear or branched C1 to C8 alkyl group, a linear or branched C1 to C8 hydroxyalkyl group or a C1 to C8 alkoxyalkyl group with optional oxygen atoms between carbon atoms of the alkyl, hydroxyalkyl and alkoxyalky groups; wherein R3 represents a linear or branched C1 to C8 alkyl group, a C1 to C8 alkoxyalkyl group, a linear or branched C1 to C8 alkylene group or a C1 to C8 alkoxyalkylene group, —O—, —NH—, —NR 4 — or —S— with R 4 being hydrogen, an alkyl group, an alkoxyalkyl group or a hydroxyalkyl group; or wherein R1 and R3 together with nitrogen and carbon atoms of the basic enamine structure form a cyclic group.