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 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: 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: A cosmetic composition for the first stage of an operation for the permanent reshaping of keratinous material, in particular the hair, which consists in reducing the disulphide bonds of keratin, characterized in that it comprises at least one active agent suitable for the reduction of the disulphide bonds of keratin, at least one basifying agent chosen from ornithine, a salt of ornithine, lysine, a salt of lysine, arginine, and a salt of arginine, and at least one cationic polymer containing primary, secondary or tertiary amine groups or quaternary ammonium groups in the main chain.

Abstract: The invention relates to a hair composition containing, in a cosmetically acceptable medium, a structuring agent insoluble in this medium and formed of solid particles, which imparts a deformable solid appearance to the composition in which the medium is contained, this agent being capable of being removed from the hair using a diluent. This composition may be a shampoo, a conditioner, a composition for dyeing or bleaching keratin fibers or alternatively a composition for permanent-waving or straightening keratin fibers.

Abstract: The invention relates to a hair-removing composition containing, in a cosmetically acceptable medium, a structuring agent insoluble in this medium and formed of solid particles, which imparts a deformable solid appearance to the composition in which the medium is contained, this agent being capable of being removed from the skin using a diluent. These particles are, in particular, expanded copolymer particles of acrylonitrile and an acrylic and/or styrene and/or vinylidene chloride monomer.

Abstract: Use of 4-[2-oxo-3-bornylidene)methyl]-phenyltrimethylammonium methyl sulphate to preserve the hair's mechanical properties, and especially its elasticity, from the ravages caused by the successive action of permanent hair shaping and light. The compound is for use in a quantity of between 0.05 and 15% by weight, in an aqueous reducing or setting composition or a composition employed in between these two steps, to achieve permanent hair shaping.

Abstract: Process for preserving the dyeing capacity of 5,6-dihydroxyindole or of its derivatives corresponding to the formula (I): ##STR1## in which R.sub.1, R.sub.2, R.sub.3 and R.sub.4, which are identical or different, denote hydrogen or a C.sub.1 -C.sub.4 lower alkyl, R.sub.1, R.sub.2 and R.sub.3 denoting hydrogen when R.sub.4 denotes alkyl in an aqueous medium, characterized in that the pH of the aqueous medium is adjusted to a value pH.sub.C 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 K.sub.CA in aqueous solution at 25.degree. C., such as pk.sub.CA, that is:0<pk.sub.CA -pH.sub.C .ltoreq.2.5and the component (B) being chosen from pH-regulating agents which have a dissociation constant K.sub.CB in aqueous solution at 25.degree. C., such as pk.sub.CB, that is:2<pk.sub.CB <pH.sub.C.

Abstract: A cosmetic reducing composition for use in the permanent deformation of hair contains, as a reducing agent, a combination of an ester of thioglycolic acid and an N-(C.sub.2 -C.sub.4) acyl cysteamine, the pH of the composition being lower than 8. This composition is employed in a process for waving the hair or straightening the hair.

Abstract: Process for dyeing keratinous fibres, comprising the step of applying to these fibres at least one composition A containing, in a medium appropriate for dyeing, at least one mono- or di-hydroxyindole the application of the composition A being preceded or followed by the application of a composition B containing, in a medium appropriate for dyeing, at least one quinone derivative chosen from ortho- or para-benzoquinones, monoimines or diimines of ortho- or para-benzoquinones, 1,2- or 1,4-naphthoquinones, sulphonimides of ortho- or para-benzoquinones, .alpha., .omega.-alkylene-bis-1,4-benzoquinones, or 1,2- or 1,4-naphthoquinone-monoimines or -diimines; the mono- or di-hydroxyindoles and the quinone derivatives being chosen such that the oxidation-reduction potential difference .DELTA.E between the oxidation-reduction potential E.sub.i of the mono- or di-hydroxyindoles, determined at pH 7 in a phosphate medium on a vitreous carbon electrode by voltametry, and the oxidation-reduction potential E.sub.

Abstract: A process for evaluating the ionic state of the surface of keratin fibers, especially human hair, which comprises taking at least one sample of fibers from the fibers to be evaluated, contacting the sample with an acidic solution of at least one acidic or basic dyestuff, assessing what, if any, change in the color of the solution has taken place and attributing the ionic state to the surface of the fibers accordingly.

Abstract: A process for evaluating the ionic state of the surface of keratin fibers, especially human hair, which comprises, taking at least one sample of fibers from the fibers to be evaluated, contacting the sample with an acidic solution of at least one acidic basic dyestuff, assessing what, if any, change in the color of the solution has taken place and attributing the ionic state to the surface of the fibers accordingly.

Abstract: A process for assessing the state of surface oxidation of keratin fiber(s), especially human hair, which results following treatment with, inter alia, peroxides and bromates. This process involves applying a porous support to the wet fiber(s) to be assessed, which support has previously been impregnated with an oxidation indicator which is a solution of iodide ions, the normality of which is from 0.2 N to 10 N, the solution also containing from 20 g/liter to 200 g/liter of solubilized starch in a buffered acid medium, and, while the porous support is in contact with the fiber(s), applying to the support a solution of a strong acid, as developer, and subsequently removing the support and examining whether or not there has been a change in the initial coloration of the support.

Abstract: A deodorant composition which prevents the formation of unpleasant odors due to bacterial decomposition of perspiration comprises a cosmetic carrier and, as the active component, a mixture of at least one weak organic acid and at least one salt of a weak organic acid and an aminated organic compound. The composition on application to the desired area of the body maintains the pH of the perspiration at a value of about 3 to 6.