Composition useful for the oxidation dyeing of human keratinous fibres
AssigneeL'oreal
InventorsFrancois Cottard, Christine Rondeau
Life of this patent
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Abstract
A composition useful for the oxidation dyeing of human keratinous fibers and in particular hair containing, in a cosmetically acceptable medium based on water and at a basic pH, at least one oxidation dye and an alkalinizing agent containing at least one alkali metal, alkaline-earth metal or ammonium metasilicate and at least one alkanolamine, and the dyeing method using this composition.
Claims31
A composition comprising, in a cosmetically acceptable medium comprising water and having a basic pH, at least one oxidation dye and an alkalinizing agent, wherein the alkalinizing agent comprises at least one metasilicate selected from the group consisting of alkali metal, alkaline-earth metal and ammonium metasilicates and at least one alkanolamine, wherein the weight ratio of metasilicate to alkanolamine is between 0.1 and 2.
A method for dyeing human keratinous fibres comprising:
- mixing a composition comprising, in a cosmetically acceptable medium comprising water and having a basic pH, at least one oxidation dye and an alkalinizing agent, wherein the alkalinizing agent comprises at least one metasilicate selected from the group consisting of alkali metal, alkaline-earth metal and ammonium metasilicates and at least one alkanolamine, with an oxidizing composition;
- and applying the mixture obtained to the fibres, after which the fibres are rinsed, washed with shampoo, rinsed again and dried, the oxidizing composition comprising hydrogen peroxide or a compound capable of releasing hydrogen peroxide in situ, or an oxidoreduction enzyme.
Dependencies are inferred from the claim text.