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Home › Process for the oxidative dyeing of keratinous fibres with a composition which contains an oxidation dye precursor, a coupler, and an oxidant at an acidic pH

Process for the oxidative dyeing of keratinous fibres with a composition which contains an oxidation dye precursor, a coupler, and an oxidant at an acidic pH

US Patent 5741337 · Granted Apr 21, 1998

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