| 摘要 |
Composition for dyeing keratinic fibres comprises a carrier, at least one first oxidation dye precursor selected from p-phenylenediamine derivatives, "double bases", o-aminophenols and heterocyclic precursors, at least one second oxidation dye precursor selected from p-aminophenols, at least one coupler selected from m-aminophenols, at least one 2-electron oxidoreductase enzyme and at least one substrate for the enzyme. Used especially for dyeing human hair by applying the composition to the hair until the desired colour has developed, preferably where the composition is prepared just before use by mixing a composition containing the oxidation dye precursors and coupler(s) with a composition containing the enzyme and substrate.
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