| 摘要 |
<p>The invention concerns a composition comprising, in a physiologically acceptable medium, an efficient amount of at least a colouring agent precursor selected among compounds comprising at least an aromatic cycle having at least two hydroxyl groups borne by two consecutive carbon atoms of the aromatic cycle, optionally an amino acid comprising at least a thiol group, and an efficient amount of a catalytic system comprising a first constituent selected among the salts and oxides of Mn(II) and/or of Zn(II) and their mixtures and a second constituent selected among alkaline hydrogen carbonates, alkaline-earth hydrogen carbonates and their mixtures, the proportions of the first and second constituents corresponding to formulae: [Mn(II)]/[HCO3] ≤ 1 with [Mn(II)] 0; [Zn(II]/ [HCO3] ≤ 1 with [Zn(II)] 0; [Mn(II) + [Zn(II]/ [HCO3] ≤ 1 with [Mn(II) + Zn(II] 0. The invention is useful for colouring the skin and/or keratinous fibres.</p> |
