| 摘要 |
Composition for dyeing keratinic fibres comprises a carrier, at least one oxidation dye precursor, at least one first coupler selected from m-phenylenediamines of formula (I) and their acid-addition salts, at least one second coupler selected from m-aminophenols and m-diphenols, at least one 2-electron oxidoreductase enzyme and at least one substrate for the enzyme. In formula (I), R1 = H, 1-4C alkyl, 1-4C monohydroxyalkyl or 2-4C polyhydroxyalkyl; R2 and R3 = H, 1-4C alkyl, 1-4C monohydroxyalkoxy or 2-4C polyhydroxyalkoxy; R4 = H, 1-4C alkoxy, 1-4C aminoalkoxy, 1-4C monohydroxyalkoxy, 2-4C polyhydroxyalkoxy or 2,4-diaminophenoxyalkoxy; provided that R1-R4 are not all H.
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