Abstract: The present invention relates to an agent for oxidatively dyeing keratin fibers, and in particular human hair, containing, in a cosmetic carrier, (a) at least one oxidation dye precursor of the developer type, and (b) isatin, and (c) at least one alkalizing agent from the group consisting of ammonia, monoethanolamine, 2-amino-2-methylpropanol, arginine, lysine, ornithine, and histidine.

Abstract: An agent for oxidatively dyeing keratinous fibers, in particular human hair, using at least one oxidation dye precursor of the developer type in combination with isatin and at least one determined complexing agent to provide a resorcinol-free hair dye.

Abstract: An agent for oxidatively dyeing keratinous fibers, and in particular human hair, using at least one developer-type oxidation dye precursor and at least one coupler-type oxidation dye precursor in combination with isatin to provide a broad spectrum of rich colorations having high fastness properties, without the use of couplers of the resorcinol type and without impairing product safety.

Abstract: An agent for oxidatively dyeing keratinous fibers, in particular human hair, containing, in a cosmetic carrier, at least one oxidation dye precursor or the developer type, isatin, and at least one oxidizing agent and related systems and methods.

Abstract: An agent for oxidatively dyeing keratin fibers, in particular human hair, containing, in a cosmetic carrier, isatin and at least one polymer from the group consisting of xanthan gum, algin, carrageenan, cetyl hydroxyethyl cellulose, carboxymethyl cellulose, tragacanth, gum karaya, gum ghatti, agar, chitin, chitosan, gum arabic, gellan gum, guar gum, tamarind seed flour, carob gum, and the physiologically acceptable salts thereof.

Abstract: The subject of the present application is an agent for the oxidative dyeing of keratinous fibers, in particular human hair, which contains the coupling oxidation dye precursors 2-(1,3-benzodioxol-5-ylamino)ethanol and 1-phenyl-3-methylpyrazol-5-one in combination with at least one oxidation base.

Abstract: The subject of the present application is an agent for the oxidative dyeing of keratinous fibers, in particular human hair, which contains the coupling oxidation dye precursor 2-(1,3-benzodioxol-5-ylamino)ethanol in combination with the oxidation base 2-methoxymethyl-para-phenylenediamine.

Abstract: The subject of the present application is an agent for the oxidative dyeing of keratinous fibers, in particular human hair, which contains the coupling oxidation dye precursor 2-(1,3-benzodioxol-5-ylamino)ethanol in combination with the oxidation base 2-(2,5-diaminophenyl)ethanol, wherein the pH of the agent is higher than 8.0.

Abstract: The subject of the present application is an agent for the oxidative dyeing of keratinous fibers, in particular human hair, which contains the coupling oxidation dye precursor 2-(1,3-benzodioxol-5-ylamino)ethanol in combination with the oxidation base 4,5-diamino-1-(2-hydroxyethyl)-1H-pyrazole.

Abstract: The present disclosure relates to a process and a kit for dyeing keratin-containing fibers, in particular human hair, using selected natural dyes and an iron(II) salt. The kit includes an aqueous composition (M) and an aqueous composition (T), where the aqueous composition (M) includes a polyphenol and a buffer system. The aqueous composition (T) includes a salt of the divalent iron cation Fe(II), and optionally includes a buffer.

Abstract: The subject of the present application is an agent for the oxidative dyeing of keratinous fibers, in particular human hair, which contains the coupling oxidation dye precursor 2-(1,3-benzodioxol-5-ylamino)ethanol in combination with the oxidation base 2-methoxymethyl-para-phenylenediamine.

Abstract: The subject of the present application is an agent for the oxidative dyeing of keratinous fibers, in particular human hair, which contains the coupling oxidation dye precursors 2-(1,3-benzodioxol-5-ylamino)ethanol and 1-phenyl-3-methylpyrazol-5-one in combination with at least one oxidation base.

Abstract: The subject of the present application is an agent for the oxidative dyeing of keratinous fibers, in particular human hair, which contains the coupling oxidation dye precursor 2-(1,3-benzodioxol-5-ylamino)ethanol in combination with the oxidation base 2-(2,5-diaminophenyl)ethanol, wherein the pH of the agent is higher than 8.0.

Abstract: The subject of the present application is an agent for the oxidative dyeing of keratinous fibers, in particular human hair, which contains the coupling oxidation dye precursor 2-(1,3-benzodioxol-5-ylamino)ethanol in combination with the oxidation base 4,5-diamino-1-(2-hydroxyethyl)-1H-pyrazole.

Abstract: The present disclosure concerns a hair care agent for the oxidative colouring or bleaching of hair, as well as a gentle method for the oxidative colouring or bleaching of hair, in which keratinous fibres are protected from oxidative influences.

Abstract: The present disclosure concerns colouring agents for keratinous fibres, in particular for human hair, which—with respect to its weight—contain at least one compound selected from the group formed by oxidative dye precursors, direct dyes and mixtures thereof, from about 0.1 to about 5% by weight of dicarboxylic acid(s) containing from about 2 to about 10 carbon atoms and/or salt(s) of this(these) acid(s), from about 20 to about 95% by weight of water, and less than about 0.1% by weight of peroxy compound(s), to produce oxidative colouring agents with improved protection of fibres.

Abstract: A first subject of the present disclosure is a special oxidant preparation for oxidative coloring of keratinous fibers, more particularly human hair, included in a cosmetic carrier (A) hydrogen peroxide and (B) at least one acid from the group of sulfuric acid, hydrochloric acid, phosphoric acid, lactic acid, citric acid, malic acid, tartaric acid, maleic acid, succinic acid, oxalic acid, ascorbic acid, phytic acid, gluconic acid, nitric acid, malonic acid, acetic acid and-or C3-C22 alkane carboxylic acids, wherein the oxidant preparation has a pH value of from about 0.5 to about 3.0. Additional subjects of the present disclosure are methods for oxidative color changing of human hair in which this special oxidant preparation is used.

Abstract: A powder additive for a keratin fiber coloring or bleaching agent or developer is provided. The powder additive includes a dicarboxylic acid containing from about 2 to about 10 carbon atoms, selected from the group of malic acid, D-tartaric acid, L-tartaric acid, meso-tartaric acid, racemic acid, alpha-ketoglutaric acid, beta-ketoglutaric acid, oxaloacetic acid, maleic acid, fumaric acid, oxalic acid, malonic acid, succinic acid, glutaric acid, adipic acid, pimelic acid, azelaic acid, sorbic acid, a salt of these dicarboxylic acids, and mixtures thereof. The powder additive also includes an amino acid or a salt of an amino acid and an alkalisilicate. The powder additive has no greater than about 10% by weight water, based on the weight of the powder additive. In addition, the powder additive includes particles and at least about 80% of the particles have an average particle size of less than 200 ?m.

Abstract: The present disclosure relates to an oxidising agent that is gentle to hair for oxidative hair dyeing or bleaching, and to a gentle method for oxidative hair dyeing or bleaching, in which keratin fibres are protected against oxidative influences.

Abstract: The subject of the present disclosure is a method for coloring of human hair, comprising the following steps in the specified sequence A) Mixing a first component (K1) with a second component (K2) to produce a first mixture (M1), B) Mixing the mixture (M1) with a third component (K3) to produce a second mixture (M2), C) Application of the mixture (M2) on the hair, D) Allowing the mixture (M2) to take effect for a period of from about 30 seconds to about 45 minutes, E) Rinsing the mixture (M2) from the hair, wherein the first component (K1) is a dye preparation comprising at least one oxidation dye precursor, and the second component (K2) is a color diluent which does not contain any oxidation dye precursors or oxidants and the third component (K3) is an oxidant preparation comprising at least one oxidant.