Abstract: The present application relates to a cosmetic composition intended for treating keratin fibers, comprising, in a support which is suitable for keratin fibers: (a) at least one enzyme of 2-electron oxidoreductase type in the presence of at least one donor for the said enzyme; (b) at least one basic amino acid; as well as to processes for treating keratin fibers, in particular processes for dyeing, permanently reshaping or bleaching the hair, using this composition.

Abstract: The present application relates to a cosmetic composition intended for treating keratin fibres, comprising, in a support which is suitable for keratin fibres: (a) at least one enzyme of 2-electron oxidoreductase type in the presence of at least one donor for the said enzyme; (b) at least one anionic amphiphilic polymer containing at least one hydrophilic unit and at least one allyl ether unit containing a fatty chain; as well as to processes for treating keratin fibres, in particular processes for dyeing, permanently reshaping or bleaching the hair, using this composition.

Abstract: The present application relates to a cosmetic composition intended for treating keratin fibers, comprising, in a support which is suitable for keratin substances: (a) at least one enzyme of 2-electron oxidoreductase type in the presence of at least one donor for the said substances; (b) at least one nonionic amphiphilic polymer containing at least one fatty chain and at least one hydrophilic unit; as well as to processes for treating keratin fibers, in particular processes for dyeing, permanently reshaping or bleaching the hair, using this composition.

Abstract: The present application relates to a cosmetic composition intended for treating keratin fibers, comprising, in a support which is suitable for keratin fibers: (a) at least one enzyme of 2-electron oxidoreductase type in the presence of at least one donor for the said enzyme; (b) at least one basic amino acid; as well as to processes for treating keratin fibers, in particular processes for dyeing, permanently reshaping or bleaching the hair, using this composition.

Abstract: The invention concerns a cosmetic composition for treating keratin fibers comprising in an appropriate support for keratin fibers: (a) at least an oxidoreductase type enzyme with 2 electrons in the presence of at least a donor for said enzyme; (b) at least an anionic surfactant selected in the group consisting of (i) acylisethionates; (ii) acyltaurates (iii) acylsarcosinates; (iv) acylglutamates; (v) polyoxyalkylene carboxylic ether acids and their salts; (vi) fatty glucamide sulphates; (vii) alkylgalactoside uronates; (viii) alkylpolyglucoside anionic derivatives; (ix) their mixtures; and the methods for treating keratin fibers, in particular for dyeing, permanently setting or bleaching hair using said composition.

Abstract: Process for preserving the dyeing capacity of 5,6-dihydroxyindole or of of its derivatives corresponding to the formula (I); in which R1, R2, R3 and R4, which are identical or different donates hydrogen or a C1-C4 lower alkyl, R1, R2 and R3 denoting hydrogen when R4 denotes alkyl in an aqueous medium, characterized in that the pH of the aqueous medium is adjusted to a value pHC of between 5 and 10 by employing a pH-regulating agent containing two components (A) and (B), the component (A) being chosen from pH-regulating agents which have a dissociation constant KCA in aqueous solution at 25° C., such as pkCA, that is: 0<pkCA−pHC≦2.5 and the component (B) being chosen from pH-regulating agents which have a dissociation constant KCB in aqueous solution at 25° C., such as pkCB, that is: 2<pkCB<pHC.

Abstract: The present application relates to a cosmetic composition intended for treating keratin fibers, comprising, in a support which is suitable for keratin fibers: (a) at least one enzyme of 2-electron oxidoreductase type in the presence of at least one donor for the said enzyme; (b) at least one aminosilicone; as well as to processes for treating keratin fibers, in particular processes for dyeing, permanently reshaping or bleaching the hair, using this composition.

Abstract: The present invention relates, firstly, to a cosmetic and/or dermatological composition intended for treating keratin fibers, in particular human keratin fibers and more particularly human hair, comprising, in a support which is suitable for keratin fibers: (a) at least one enzyme of 2-electron oxidoreductase type in the presence of at least one donor for the said enzyme; (b) at least one substantive polymer chosen from the group consisting of: (i) cationic cellulose derivatives; (ii) dimethyldiallylammonium halide homopolymers and copolymers of dimethyldiallylammonium halide and of (meth)acrylic acid; (iii) methacryloyloxyethyltrimethylammonium halide homopolymers and copolymers; (iv) polyquaternary ammonium polymers; (v) vinylpyrrolidone polymers containing cationic units; (vi) mixtures thereof. The present invention also relates to processes for treating keratin fibers, in particular processes for dyeing, permanently reshaping or bleaching the hair using this composition.

Abstract: The present application relates to a cosmetic composition intended for treating keratin fibers, comprising, in a support which is suitable for keratin fibres: (a) at least one enzyme of 2-electron oxidoreductase type in the presence of at least one donor for the said enzyme; (b) at least one nonionic guar gum; as well as to processes for treating keratin fibers, in particular processes for dyeing, permanently reshaping or bleaching the hair, using this composition.

Abstract: Method for dyeing keratinous fibers, in particular, human keratinous fiber such as hair, without the use of iodide ions wherein a tinctorial composition containing, in a cosmetically acceptable medium having a pH of less than or equal to 7, at least one indole derivative corresponding to the formula in which: R1 denotes hydrogen, alkyl or COOH; R2 denotes hydrogen or alkyl; R denotes hydrogen, Si(CH3)3, or COalkyl; and X denotes hydrogen, OH, or OSi(CH3)3; it being possible for X in the 4- or 5-position also to denote the O-alkyl group, on condition that when X is in the 5-position with the meanings mentioned above and OR denotes OH in the 4- or 6-position, only one of the group R1 and R2 then differs from hydrogen; that when X denotes hydrogen, OR must be in the 7-position and R2 must denote hydrogen; and that when R denotes hydrogen and X denotes OH, OR and X are then in the 5- and the 6-position and R1 denotes COOH, to the fibers in a first step and, after a dwell time followed by

Abstract: The invention relates to a ready-to-use composition for the oxidation dyeing of keratin fibers, and in particular human keratin fibers such as the hair, comprising, in a medium which is suitable for dyeing, at least one oxidation base, at least one cationic direct dye and at least one enzyme of 2-electron oxidoreductase type in the presence of at least one donor for the said enzyme, and to the dyeing process using this composition.

Abstract: The present invention relates to a composition for the oxidation dyeing of keratin fibers, in particular human keratin fibers such as the hair, comprising at least two oxidation bases which are different from each other in combination with a suitably selected indole coupler, and to the dyeing process using this composition with an oxidizing agent.

Abstract: Hydraulic coupler compounds corresponding to the formula: ##STR1## in which R.sub.1 denotes a hydrogen atom or a C.sub.1 -C.sub.4 alkyl radical; R.sub.2 and R.sub.3, which may be identical or different, denote a hydrogen atom, a C.sub.1 -C.sub.4 lower alkyl radical, a carboxyl radical or an alkoxycarbonyl radical; X denotes a C.sub.1 -C.sub.4 lower alkyl radical, a C.sub.1 -C.sub.18 alkoxy radical, a halogen atom, a C.sub.1 -C.sub.20 acyloxy radical, an acetylamino group, a trimethylsilyloxy group or a dialkyl(C.sub.1 -C.sub.4)aminomethyl group, the OH group occupying the 6- or 7-positions, as well as their salts, are combined with oxidation dye precursors for dyeing keratinous fibers.

Abstract: Dyeing keratinous fibers, in particular human keratinous fibers such as hair, by applying to these fibers a composition containing, in a medium suitable for dyeing at least, as coupler, one alkoxymethaphenylenediamine of formula (I) below: ##STR1## which is, for example, 2,4-diaminoanisole, and at least one oxidation dye precursor or oxidation base, at least one oxidizing agent, wherein the pH of the composition applied to the fibers is less than 7.

Abstract: An oxidation dyeing composition for keratinous fibres, in particular human keratinous fibres such as hair, of the type comprising a medium suitable for dyeing, the medium containing at least one first para-phenylenediamine oxidation dye precursor containing a primary, secondary or tertiary amine function; at least one first meta-phenylenediamine coupling agent; and either at least one second para-aminophenol oxidation dye precursor or at least one second meta-aminophenol coupling agent; or the acid addition salts thereof. The use of this composition for dyeing keratinous fibres, in particular human keratinous fibres such as hair.

Abstract: A ready-to-use composition for the oxidation dyeing of keratin fibers, in particular human keratin fibers such as the hair, this ready-to-use composition comprising at least one oxidation base in combination with at least one selected cationic direct dye and at least one oxidizing agent, as well as to the dyeing process using this ready-to-use composition.

Abstract: The invention relates to a dyeing composition for keratinous fibers and in particular for human keratinous fibers such as hair, comprising, in a suitable medium for dyeing, at least one oxidation dye precursor chosen from 3-methyl-para-aminophenol, 2-methyl-para-aminophenol and 2-hydroxymethyl-para-aminophenol, and their addition salts with an acid; at least one coupling agent chosen from the 2-methyl-5-aminophenols of formula (I): ##STR1## in which R denotes hydrogen, methyl or ethyl or a .beta.-hydroxyethyl or .gamma.-hydroxypropyl group, and their addition salts with an acid; and as oxidation dye precursor, a para-aminophenol which is 2-substituted by a substituent which is different from methyl or hydroxymethyl, or one of its addition salts with an acid.

Abstract: A ready-to-use composition for the oxidation dyeing of keratin fibers, in particular human keratin fibers such as the hair, comprising at least one oxidation base selected from para-phenylenediamines and bis(phenyl)alkylenediamines, in combination with at least one coupler selected from meta-diphenols, at least one selected cationic direct dye and at least one oxidizing agent, as well as to the dyeing process using this composition.

Abstract: A method or composition for dyeing keratinous fibres using as an oxidation dye precursor a 3-substituted para-aminophenol of formula: ##STR1## where R.sub.1 represents alkyl, alkenyl, mono- or polyhydroxyalkyl, cyano, cyanoalkyl, halogenoalkyl, aminoalkyl or alkoxyalkyl and R.sub.2 represents hydrogen, alkyl or mono- or polyhydroxyalkyl, provided that when R.sub.2 is hydrogen R.sub.1 is not methyl or trifluoromethyl, and addition salts thereof with an acid.

Abstract: A ready-to-use composition for the oxidation dyeing of keratinous fibers, especially of human keratinous fibers such as hair, which comprises, in an alkaline medium (pH>7), an appropriately selected para-phenylenediamine derivative in combination with 4-hydroxyindole and an oxidizing agent, and dyeing processes using this composition.