| abstract |
Coloration composition, process for obtaining same and its use for the coloration of keratin fibres. n The composition comprises, in a physiologically acceptable medium, a efficacious quantity of at least a first colouring material precursor selected from the compounds containing at least one aromatic ring having at least two hydroxyl groups borne by two adjacent carbon atoms of the aromatic ring, an efficacious quantity of at least a second colouring material precursor of the para or ortho type selected from the aromatic amines, and an efficacious quantity of a catalytic system comprising a first constituent selected from the salts and oxides of Mn(II) and/or Zn(II) and their mixtures, and a second constituent selected from the alkali hydrogen carbonates, the alkaline earth hydrogen carbonates and their mixtures. n Application to the Coloration of Keratin Fibres. |