Abstract: The invention relates to a composition comprising at least one oxidation dye coupler chosen from 6-hydroxy benzomorpholine of formula (I), hydroxyethyl-3.4-methy lenedioxyaniline of formula (II). 2-amino-5-ethylphenol of formula (III), one of their addition salts, their solvates and/or the solvates of their salts, and at least one compound chosen from N,N-dicarboxymethyl glutamic acid, one of its salts and mixtures thereof. The invention also relates to a process for dyeing keratin fibres, preferably the hair, comprising the application of the composition to said keratin fibres.

Abstract: The invention relates to a process for dyeing keratin fibres, preferably the hair, comprising the application to said keratin fibres of a composition comprising at least one oxidation dye base chosen from para-phenylenediamine derivatives of formula (I), their addition salts, their solvates and/or the solvates of their salts, in which R is chosen from a (C1-C4)alkoxy(C1-C4)alkyl radical and a C1-C4 hydroxyalkyl radical, at least one compound chosen from N,N-dicarboxymethylglutamic acid, one of its salts and mixtures thereof and a chemical oxidizing agent. The process may comprise the step of mixing a dyeing composition comprising the oxidation dye base and the N,N-dicarboxymethylglutamic acid compound with an oxidizing composition comprising one or more chemical oxidizing agents and applying the obtained mixture to the keratin fibres. A multi-compartment device comprises a first compartment containing the dyeing composition and a second compartment containing the oxidizing composition.

Abstract: A subject of the present invention is a cosmetic composition comprising 6-hydroxybenzornorpholine of formula (II), hydroxyethyl-3,4-methylenedioxyaniline of formula (III), at least one compound chosen from N,N-dicarboxymethylglutamic acid, its salts and mixtures thereof. The present invention also relates to a process for dyeing keratin fibres, such as the hair, wherein the composition as described previously is applied to said fibres. Another subject of the present invention is the use of the composition according to the invention for the cosmetic treatment of keratin fibres such as the hair.

Abstract: The invention relates to a composition comprising at least one oxidation coupler chosen from hydroxyethyl-3,4-meth-lenedioxyaniline of formula (I), one of its addition salts, its solvates and/or the solvates of its salts, at least one oxidation coupler chosen from 2-amino-5-ethylphenol of formula (II), one of its addition salts, its solvates and/or the solvates of its salts, and at least one compound chosen from N,N-dicarboxymethyl glutamic acid, one of its salts and mixtures thereof. The invention also relates to a process for dyeing keratin fibres, preferably the hair, comprising the application of the composition to said keratin fibres.

Abstract: The invention relates to a composition comprising the combination of at least one fatty substance, the total content of fatty substance being greater than or equal to 30% by weight, relative to the total weight of the composition, at least one particular carboxylic acid and at least one oxidation dye and/or an alkaline agent.

Abstract: The invention relates to a composition comprising at least one oxidation coupler chosen from 6-hydroxybenzomorpholine of formula (I), one of its addition salts, its solvates and/or the solvates of its salts, at least one oxidation coupler chosen from 2-amino-5-ethylphenol of formula (II), one of its addition salts, its solvates and/or the solvates of its salts, and at least one compound chosen from N, N-dicarboxymethyl glutamic acid, one of its salts, and mixtures thereof. The invention also relates to a process for dyeing keratin fibres, preferably the hair, comprising the application of the composition to said keratin fibres.