| abstract |
Process for dyeing keratin fibers, in particular human keratin fibers such as hair, in which said fibers are treated, in one or more stages, with one or more cosmetic compositions containing the following ingredients, taken together or separately in said composition or compositions: a) one or more dyes chosen from oxidation dyes and direct synthetic dyes and dyes of natural origin; b) one or more salts of Ti; optionally b1) one or more carboxylic acids of the following formula (I): formula (I) or one of its salts, in which: - A represents a monovalent group when n has zero value or a polyvalent group when n is greater than or equal to 1, saturated or unsaturated, cyclic or non-cyclic and aromatic or non-aromatic hydrocarbon base group comprising 1 to 50 carbon atoms which is optionally interrupted with one or more heteroatoms and / or optionally substituted, in particular with one or more hydroxyl groups; preferably, A represents a monovalent (C1-C6) alkyl group or a polyvalent (C1-C6) alkylene group optionally substituted with one or more hydroxyl groups; - n represents an integer between 0 and 10 inclusive; preferably, n is between 0 and 5, such as between 0 and 2; c) one or more non-cellulosic based polysaccharides; preferably at least one of the compositions used in the dyeing process is at an acidic pH, that is, less than 7.0, preferably less than 5, in particular at a pH between 0 and 4 inclusive, more particularly between 0.5 and 3.5, preferably between 1 and 3. |