Abstract: The invention relates to an oxidation dyeing process for human keratin fibres, which comprises applying to the fibres a dye composition (A) containing, in a medium which is suitable for dyeing, at least one oxidation dye precursor and optionally one or more couplers; developing the colour in alkaline, neutral or acidic medium using an oxidizing composition (B) containing an oxidizing agent, at least one of the compositions (A) and (B) also containing an effective amount of at least one cationic amphiphilic polymer chosen from quaternized celluloses modified with groups containing at least one fatty chain, chosen from alkyl, arylalkyl and alkylaryl groups containing at least 8 carbon atoms, or mixtures thereof, and quaternized hydroxyethylcelluloses modified with groups containing at least one fatty chain, chosen from alkyl, arylalkyl and alkylaryl groups containing at least 8 carbon atoms, or mixtures thereof; the compositions (A) and (B) being mixed together immediately before use or applied one after the ot

Abstract: The invention relates to a composition useful for the oxidation dyeing of keratin fibres, in particular of human keratin fibres and more particularly the hair, comprising, preferably in a medium that is suitable for dyeing, at least one oxidation dye, wherein it also comprises at least one polyoxyalkylenated carboxylic acid ether or a salt thereof, and at least one quaternized cellulose comprising at least one fatty chain.

Abstract: The invention relates to a composition useful for the oxidation dyeing of keratin fibres, in particular of human keratin fibres and more particularly the hair, containing, in a medium that is suitable for dyeing, at least one oxidation dye, at least one polyoxyalkylenated carboxylic acid ether or a salt thereof, at least one nonionic surfactant and at least one cationic or amphoteric polymer whose cationic charge density is greater than or equal to 2 meq/gram.

Abstract: The invention relates to a composition for the oxidation dyeing of keratin fibres, particularly human keratin fibres such as hair, comprising, in an appropriate dyeing medium, at least one oxidation dyestuff precursor and/or coupler selected from paraphenylenediamines, double bases, paraminophenols, metaphenylenediamines, metaminophenols, metadiphenols, bases and heterocyclic couplers, and the addition salts of these compounds with an acid, and at least one amphoteric polymer with at least one fatty chain having from 8 to 30 carbon atoms.

Abstract: The invention relates to a composition useful for the oxidation dyeing of keratin fibres, in particular of human keratin fibres and more particularly the hair, containing, in a medium that is suitable for dyeing, at least one oxidation dye, wherein it also comprises at least one polyoxyalkylenated carboxylic acid ether or a salt thereof, at least one mono- or polyglycerolated surfactant and at least one fatty alcohol (C8-C30) comprising at least one unsaturation.

Abstract: Compositions for oxidation dyeing of keratinous fibers, for example, human keratinous fibers such as hair, further such as human hair, comprising, in a medium suitable for dyeing, at least one oxidation dye, at least one cationic amphiphilic polymer comprising at least one fatty chain, and a combination comprising: (I) at least one compound chosen from oxyalkylenated and glycerolated fatty alcohols and (II) at least one hydroxylated solvent, wherein the hydroxylated solvent may have a molecular weight of less than 250, and wherein the weight ratio of (I) to (II) is greater than 1:1 and dyeing processes and devices, such as kits, comprising such compositions.

Abstract: Compositions for oxidation dyeing of keratinous fibers, for example, human keratinous fibers such as hair, further such as human hair, comprising, in a medium suitable for dyeing, at least one oxidation dye, at least one cationic amphiphilic polymer comprising at least one fatty chain, and a combination comprising: (I) at least one compound chosen from oxyalkylenated and glycerolated fatty alcohols and (II) at least one hydroxylated solvent, wherein the hydroxylated solvent may have a molecular weight of less than 250, and wherein the weight ratio of (I) to (II) is greater than 1:1 and dyeing processes and devices, such as kits, comprising such compositions.

Abstract: Compositions for oxidation dyeing of keratinous fibers, for example, human keratinous fibers such as hair, further such as human hair, comprising, in a medium suitable for dyeing, at least one oxidation dye, at least one cationic amphiphilic polymer comprising at least one fatty chain, and a combination comprising: (I) at least one compound chosen from oxyalkylenated and glycerolated fatty alcohols and (II) at least one hydroxylated solvent, wherein the hydroxylated solvent may have a molecular weight of less than 250, and wherein the weight ratio of (I) to (II) is greater than 1:1 and dyeing processes and devices, such as kits, comprising such compositions.

Abstract: The invention relates to a process for improving the color fastness of a dyed keratin fiber comprising applying to said fiber (a) at least one dye composition containing, in a medium suitable for dyeing, at least one oxidation base selected from bis(phenyl)alkylenediamines, para-aminophenols, ortho-aminophenols, heterocyclic bases and para-phenylenediamines of formula (I), and the addition salts of these compounds with an acid: in which: R1 represents a hydrogen atom or a C1-C4 alkyl, C1-C4 monohydroxyalkyl, C2-C4 polyhydroxyalkyl, phenyl or 4′-aminophenyl radical, R2 represents a hydrogen atom or a C1-C4 alkyl, C1-C4 monohydroxyalkyl or C2-C4 polyhydroxyalkyl radical, R3 represents a hydrogen atom, a halogen atom, or a C1-C4 alkyl, C1-C4 monohydroxyalkyl or C1-C4 hydroxyalkoxy radical, and R4 represents a hydrogen atom or a C1-C4 alkyl radical, and (b) developing the color at acidic, neutral or alkaline pH using an oxidizing agent, wherein said oxidizing agent is added to said dye co