Dye composition comprising 12-hydroxystearic acid, an organic amine and a dye

A process for preparing a cosmetic composition, comprising:

• mixing 12-hydroxystearic acid, at least one organic amine, and at least one dye,
• optionally heating the mixture for a period of time ranging from 1 to 10 minutes at a temperature ranging from 60 to 70° C., with or without stirring, and
• cooling the mixture to room temperature.

A ready-to-use composition resulting from the extemporaneous mixing a dye composition (A) comprising 12-hydroxystearic acid, at least one organic amine, and at least one dye chosen from oxidation dyes or direct dyes, with an oxidizing composition (B) comprising at least one oxidizing agent.

A multi-compartment device for dyeing keratin fibers, comprising at least two compartments, wherein:

• the first compartment contains a dye composition (A) comprising 12-hydroxystearic acid, at least one organic amine, and at least one dye chosen from oxidation dyes or direct dyes;
• and
• the second compartment contains an oxidizing composition (B) comprising at least one oxidizing agent.

A process for dyeing keratin fibers, the process comprising applying to the fibers a dye composition comprising:

• 12-hydroxystearic acid,
• at least one organic amine, and
• at least one dye chosen from oxidation dyes or direct dyes.

A process for dyeing keratin fibers, the process comprising applying to the fibers a ready-to-use composition resulting from the extemporaneous mixing a dye composition (A) comprising 12-hydroxystearic acid, at least one organic amine, and at least one dye chosen from oxidation dyes or direct dyes, with an oxidizing composition (B) comprising at least one oxidizing agent.