| abstract |
Use of a simple or polymeric inorganic or organic salt of magnesium in a process for dyeing keratin fibers and in particular human hair, using 5,6-dihydroxyindole and / or its derivatives as coloring agent corresponding to formula (I): (CF DRAWING IN BOPI) in which R1, R2 R3, R4, identical or different, denote hydrogen or lower C1 -C4 alkyl, R1, R2, R3 denoting hydrogen when R4 denotes C1-alkyl -C4. |