90.
    发明专利
    未知

    公开(公告)号:BR8904561A

    公开(公告)日:1990-04-24

    申请号:BR8904561

    申请日:1989-09-11

    Applicant: OREAL

    Abstract: Process for dyeing keratin fibres consisting in applying on these fibres a composition (A) containing at least one indole colorant of formula: (I) where R1=H or C1-C4 alkyl; R2 and R3, which may be identical or different, denote H, C1-C4 alkyl, carboxyl or alkoxycarbonyl; or a salt or a precursor of a compound (I), associated, either with iodide ions, or with H2O2; application of composition (A) being preceded or followed by the application of a compound (B) which contains, either H2O2 at a pH of 2 to 12 when (A) contains iodide ions, or iodide ions at a pH of 2 to 11 when (A) contains H2O2. This process allows particularly powerful and resistant dyes to be made.

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