Process for dyeing keratinous fibres with 5,6-dihydroxy-indole combined with an iodide and dyeing composition employed
AssigneeL'oreal
InventorsJean F. Grollier, Didier Garoche
Life of this patent
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Abstract
The invention relates to a plural stage process for dyeing keratinous fibers wherein a composition (A) comprising, in a medium suitable for dyeing, 5,6-dihydroxyindole and iodide ions, is applied to the hair, the application of said composition (A) being preceded or followed by the application of a composition (B) comprising hydrogen peroxide.
Claims30
A plural stage process for dyeing keratinous fibers comprising applying to said keratinous fibers in an amount effective to dye said keratinous fibers a composition (A) comprising, in a medium suitable for dyeing keratinous fibers, 5,6-dihydroxyindole present in an amount ranging from 0.01 to 5 weight percent and iodide ions present in an amount ranging from 0.007 to 4 weight percent expressed as I.sup.- ions relative to the total weight of said composition (A), the application of said composition (A) being preceded or followed by the application of composition (B) comprising, in a medium suitable for dyeing keratinous fibers, hydrogen peroxide at a concentration ranging from 1 to 40 volumes at a pH ranging from 2 to 7.
A keratinous fiber dyeing composition comprising, in a medium suitable for dyeing keratinous fibers, 5,6-dihydroxyindole present in an amount ranging from 0.01 to 5 weight percent and iodide ions present in an amount ranging from 0.007 to 4 weight percent expressed in I.sup.- ions relative to the total weight of said composition.
A kit for dyeing keratinous fibers containing at least two compartments, one of said compartments containing a composition comprising in a medium suitable for dyeing keratinous fibers, 5,6-dihydroxyindole present in an amount ranging from 0.01 to 5 weight percent and iodide ions present in an amount ranging from 0.007 to 4 weight percent expressed as I.sup.- ions relative to the total weight of said composition, and another of said compartments containing an aqueous composition of hydrogen peroxide present at a concentration of 1 to 40 volumes, said aqueous composition having a pH ranging from 2 to 7.
A kit for dyeing keratinous fibers containing at least three compartments, a first of said compartments containing a composition comprising in a medium suitable for dyeing keratinous fibers iodide ions present in an amount ranging from 0.007 to 4 weight percent expressed as I.sup.- ions, a second of said compartments containing a composition comprising, in a medium suitable for dyeing keratinous fibers, 5,6-dihydroxyindole present in an amount ranging from 0.01 to 5 weight percent, and a third of said compartments containing an aqueous composition of hydrogen peroxide present at a concentration of 1 to 40 volumes, said aqueous composition having a pH ranging from 2 to 7.
Dependencies are inferred from the claim text.