| abstract |
A method for dyeing keratin fibres by applying thereto: a component (1) consisting of an aqueous dyeing medium containing a compound of formula (I) or (II), wherein R1 is hydrogen or alkyl; R2 is hydrogen, alkyl or COOH; R3 is hydrogen or alkyl; X is hydrogen, OH, NH2, alkyl or alkoxy; and Y is OH or NH2; a component (2) consisting of an aqueous dyeing medium containing a peroxidase enzyme; and a component (3) containing hydrogen peroxide or an enzymatic hydrogen peroxide source; said component (1) being applied first and separately from component (3). |