Process for dyeing keratinous fibres with oxidation dyes combined with indole derivatives and dyeing composition employed

A process for dyeing keratinous fibers comprising applying to said fibers at least one composition (A) containing in a medium suitable for dyeing said fibers at least 5,6-dihydroxyindole present in an amount ranging from 0.03 to 3 weight percent based on the total weight of said composition (A) and at least one oxidation dye consisting of a rapid oxidation dye which generates a colored compound by oxidation in air within one hour and a coupler, said oxidation dye being present in an amount ranging from 0.25 to 5 weight percent based on the total weight of said composition (A), in combination with a source of iodide ions present in an amount ranging from 0.08 to 1.5 weight percent, expressed as I.sup.- ions and based on the total weight of said composition (A), the application of said composition (A) being preceded or followed by the application of composition (B) containing, in a medium suitable for dyeing said fibers, hydrogen peroxide at a pH ranging from 2 to 12.

A multicompartment kit for use in dyeing keratinous fibers comprising a first compartment housing a composition comprising (i) an indole derivative present in an amount ranging from 0.03 to 3 weight percent based on the total weight of said composition, (ii) an oxidation dye consisting of a rapid oxidation dye which generates a colored compound by oxidation in air within one hour and a coupler, said oxidation dye being present in an amount ranging from 0.25 to 5 weight percent based on the total weight of said composition, and (iii) a source of iodide ions present in an amount ranging from 0.08 to 1.5 weight percent, expressed as I.sup.- ions and based on the total weight of said composition, in a medium suitable for dyeing said keratinous fibers, and a second compartment housing an aqueous hydrogen peroxide composition.

A multicompartment kit for use in dyeing keratinous fibers comprising a first compartment housing a composition comprising, in an anhydrous solvent medium, a source of iodide ions present in an amount ranging from 0.08 to 1.5 weight percent, expressed as I.sup.- ions and based on the total weight of said composition, an indole derivative present in an amount ranging from 0.03 to 3 weight percent based on the total weight of said composition and an oxidation dye consisting of a rapid oxidation dye which generates a colored compound by oxidation in air within one hour and a coupler, said oxidation dye being present in an amount ranging from 0.25 to 5 weight percent based on the total weight of said composition;

• a second compartment housing an aqueous medium suitable for dyeing said kerationous fibers;
• and a third compartment housing an aqueous hydrogen peroxide composition of 1 to 40 volumes having a pH ranging from 2 to 12;
• the contents of said second compartment being intended to be admixed with the contents of said first compartment at the time of use.

A multicompartment kit for use in dyeing kerationous fibers comprising a first compartment housing a composition comprising, in a medium suitable for dyeing said keratinous fibers, an indole derivative present in an amount ranging from 0.03 to 3 weight percent based on the total weight of said composition and an oxidation dye consisting of a rapid oxidation dye which generates a colored compound by oxidation in air within one hour and a coupler, said oxidation dye being present in an amount ranging from 0.25 to 5 weight percent based on the total weight of said composition;

• a second compartment housing a composition comprising, in a medium suitable for dyeing said keratinous fibers, a source of iodide ions present in an amount ranging from 0.08 to 1.5 weight percent, expressed as I.sup.- ions and based on the total weight of said composition;
• and a third compartment housing hydrogen peroxide in an aqueous medium;
• the contents of said third compartment being intended to be admixed with the contents of said first compartment immediately before use.