Dyeing compositions based on oxidation dyestuff precursors and on nitro benzene dyestuffs and their use for dyeing keratin fibres

摘要

Dyeing compositions are disclosed which comprise at least one oxidation dyestuff precursor in combination with at least one direct dyestuff, in an aqueous vehicle, the direct dyestuff being a nitro derivative of the benzene series having the formula: <IMAGE> in which R1 denotes the methyl group, R2 and R4 denote hydrogen and R3 denotes the beta -hydroxyethoxy group, or alternatively R1, R3 and R4 denote hydrogen and R2 denotes the methyl or hydroxyl group, or alternatively R1 and R2 denote hydrogen, R3 denotes the methyl group and R4 denotes the hydroxyl, ( beta -hydroxyethyl)-amino or ( beta -N,N-diethylaminoethyl)-amino group, or R1, R2 and R3 denote hydrogen and R4 denotes the N,N-bis-( beta -hydroxyethyl)-amino group.