| abstract |
USE OF HYDROXYNAPHTOQUINONES FOR DYING HUMAN KERATINIC FIBERS, DYING PROCESS USING THEM AND TINCTORIAL COMPOSITION USED. USE FOR DYING HUMAN KERATINIC FIBERS, AND IN PARTICULAR HAIR, OF 2-HYDROXY 1,4-NAPHTOQUINONES CHARACTERIZED BY THE FACT THAT THEY COMPLY WITH THE FORMULA: (CF DRAWING IN BOPI) IN WHICH R DESIGNATES AN ATOM OF ' HYDROGEN OR A HYDROXYL, ALCOXY, NITRO GROUP, A HALOGEN ATOM, AN ALKYL OR ACYL GROUP, R, R, R, R DESIGNATE INDEPENDENTLY ONE OF THE OTHER HYDROGEN, A HYDROXYL, ALCOXY, ALKYL, ACYL GROUP, AT LEAST ONE OF THE RAR SUBSTITUENTS IS DIFFERENT FROM HYDROGEN AND WHERE R, R AND R DESIGNATE HYDROGENE R AND R CANNOT SIMULTANEOUSLY DESIGNATE HYDROXYL. |