Cosmetic products for dyeing keratin fibers

Abstract

The present invention is directed to a cosmetic product for dyeing keratinous fibers, preferably for dyeing human keratinous fibers, more preferably for dyeing human hair, comprising a composition A comprising one or more alkalizing agents and one or more direct dyes, and an aqueous composition B having a pH of 1 to 6 and comprising a) hydrogen peroxide and b) one or more compounds selected from the following group: 1) xanthine, 2) ortho-diphenol derivatives and 3) imidazolidine-2,4-dione derivatives.

Description

[Technical Field]

[0001] This invention relates to cosmetic products for dyeing keratin fibers. Furthermore, a dyeing method and its use are disclosed. [Background technology]

[0002] Aqueous hydrogen peroxide-containing compositions are well known in the art. These compositions are essential components in many industrial and artisanal processes. For example, the presence of an oxidizing composition is necessary for the decolorization or dyeing of solid substrates. In particular, the yarn, wool, and beauty industries rely on the performance of these compositions.

[0003] However, a common problem with such compositions is that hydrogen peroxide tends to decompose during storage, which reduces the amount of available reactive oxygen species in the composition over time. This decomposition process is particularly problematic in decolorization, dyeing, and perming treatments. For users of hydrogen peroxide compositions, it is essential that these compositions have a long shelf life to maintain their initial performance.

[0004] The autodecomposition process of hydrogen peroxide increases with temperature. Therefore, decomposition proceeds more rapidly in countries with warm climates or under less-than-ideal storage conditions at the user's facility. As a result, users will encounter lower performance in dyeing, bleaching, or perming treatments when using compositions with shorter storage times, compared to results from two months prior.

[0005] Prior art has not adequately addressed this problem.

[0006] For example, Patent Document 1 focuses on the stability of the formulation, but does not focus on the chemical stability of the aqueous oxidation composition.

[0007] Xanthines and their derivatives are well-known ingredients in dermatology and the food industry. Furthermore, caffeine-containing cleansing compositions are also well-known (e.g., Mintel #6713099).

[0008] Patent Document 2 describes an aqueous oxidation composition containing 5% by weight or less of hydrogen peroxide and a purine derivative, especially caffeine. It has been found that the purine derivative reduces damage to keratin fibers. (Patent Document 1) EP2198923 (Patent Document 2) WO2009 / 053180

Summary of the Invention

Problems to be Solved by the Invention

[0009] Despite prior art attempts, there is still a need to improve the stability of hydrogen peroxide when combined with the dyeing performance of direct dyes.

Means for Solving the Problems

[0010] [[ID=~]] A first object of the present invention is a cosmetic product for dyeing keratin fibers, preferably human keratin fibers, more preferably human hair, comprising: - Composition A containing one or more alkalizing agents and one or more direct dyes, - having a pH of 1 to 6, ...

[0011]

Chem.

[0012] A second object of the present invention is the composition A and B as defined above, and Note: There seem to be some missing or incorrect tags in the original text (e.g., - and - in the middle part). I've translated as much as possible based on the provided text. If you can correct or clarify those tags, it would be better for a more accurate translation. - A decolorizing powder composition C comprising one or more perate and / or peroxide salts, and one or more alkalizing agents. - A water-based brightening composition D containing one or more alkalizing agents and having a pH of 7 to 12, - Aqueous dyeing composition E having a pH of 7-12 and containing one or more dyes selected from oxidation dye precursors, oxidation dye couplers and / or direct dyes, and / or salts thereof and / or mixtures thereof. A kit of parts comprising one or more compositions selected from the following.

[0013] A third object of the present invention is a method for dyeing keratin fibers, preferably human keratin fibers, more preferably human hair, i) A step of preparing compositions A and B as defined above, ii) A step of mixing the compositions together to obtain a ready-to-use composition having a pH of 7 to 12. iii) Apply the composition prepared for use to keratin fibers and let it stand for 1 to 60 minutes. iv) Rinse the keratin fibers and optionally shampoo the keratin fibers. This method includes [something].

[0014] A fourth object of the present invention is to improve the color intensity and / or wash fastness of direct dyes on keratin fibers, preferably on human keratin fibers, more preferably on human hair.

[0015] [ka] [In the formula, R1, R2, and R3 are independently selected from H and CH3, and / or mixtures thereof]. 2) One or more orthodiphenols and / or derivatives thereof, and / or mixtures thereof and / or salts thereof 3) One or more imidazolidine-2,4-diones and / or derivatives thereof, and / or mixtures thereof and / or salts thereof The use of one or more compounds selected from the following. [Modes for carrying out the invention]

[0016] The inventors unexpectedly found that the cosmetic product of claim 1 increased the chemical and physical storage stability of the aqueous oxidation composition containing hydrogen peroxide, both at room temperature and at high temperatures. Furthermore, the staining results of the composition were found to be stronger, and it exhibited improved wash fastness. Thus, the performance of the composition was unexpectedly found to remain stable over time.

[0017] Cosmetic products The present invention relates to a cosmetic product for dyeing keratin fibers, preferably human keratin fibers, and more preferably human hair. - Composition A comprising one or more alkalizing agents and one or more direct dyes, - Has a pH of 1-6,

[0018] [ka] [In the formula, R1, R2, and R3 are independently selected from H and CH3, and / or mixtures thereof]. 2) One or more orthodiphenols and / or derivatives thereof, and / or mixtures thereof and / or salts thereof 3) One or more imidazolidine-2,4-diones and / or derivatives thereof, and / or mixtures thereof and / or salts thereof Aqueous composition B containing This applies to products that include the following:

[0019] Composition A The present invention partially relates to composition A, which comprises one or more alkalizing agents and one or more direct dyes.

[0020] Composition A of the present invention contains one or more alkalizing agents.

[0021] From the viewpoint of providing alkalinity and ensuring cosmetic safety, it is preferable that the one or more alkalizing agents are one or more organic alkalizing agents and / or salts thereof, and / or ammonia and / or salts thereof.

[0022] From the viewpoint of providing alkalinity, cosmetic safety, and low odor, preferably one or more organic alkalizing agents are selected from alkyl and / or alkanolamines and / or their salts, and more preferably these / these are selected from monoethanolamine, diethanolamine, monoethanolmethylamine, monoethanoldimethylamine, diethanolmethylamine, monoethanolethylamine, monoethanoldiethylamine, diethanolethylamine, monoethanolpropylamine, monoethanoldipropylamine, diethanolpropylamine, monoethanolbutylamine, diethanolbutylamine, trimethylamine, triethylamine, 2-amino-2-methylpropanol, tris-(hydroxymethyl)-aminomethane and / or their salts and / or mixtures thereof.

[0023] From the standpoint of providing alkalinity and ensuring cosmetic safety, the most preferred alkalizing agents are selected from monoethanolamine, 2-amino-2-methylpropanol, tris-(hydroxymethyl)-aminomethane and / or their salts, ammonia and / or its salts, and / or mixtures thereof.

[0024] In one aspect of the present invention, from the viewpoint of storage stability, the one or more alkalizing agents are preferably one or more inorganic alkalizing agents, preferably one or more inorganic alkalizing agents selected from metasilicates, carbonates and / or bicarbonates, and / or alkali salts or alkaline earth salts thereof, and / or mixtures thereof, but preferably sodium metasilicate.

[0025] From the viewpoint of providing alkalinity, the total concentration of the alkalizing agent, preferably one or more alkanolamines and / or their salts, and / or ammonia and / or its salts, is preferably 0.1% by weight or more, more preferably 0.25% by weight or more, and even more preferably 0.5% by weight or more, based on the total weight of composition A.

[0026] From the viewpoint of providing alkalinity, preventing hair damage and odor, the total concentration of the alkalizing agent, preferably one or more alkanolamines and / or their salts, and / or ammonia and / or its salts, is preferably 40% by weight or less, more preferably 30% by weight or less, and even more preferably 25% by weight or less, based on the total weight of composition A.

[0027] To obtain the above effects, the total concentration of the alkalizing agent, preferably one or more alkanolamines and / or their salts, and / or ammonia and / or its salts, is preferably 0.1% to 40% by weight, preferably 0.25% to 30% by weight, and more preferably 0.5% to 25% by weight, based on the total weight of composition A.

[0028] Composition A of the present invention comprises one or more direct dyes.

[0029] In principle, all direct dyes are suitable for the purposes of this invention. In particular, anionic, cationic, or neutral direct dyes are preferred.

[0030] Suitable anionic direct dyes are Acid Black 1, Acid Blue 1, Acid Blue 3, Food Blue 5, Acid Blue 7, Acid Blue 9, Acid Blue 74, Acid Orange 3, Acid Orange 6, Acid Orange 7, Acid Orange 10, Acid Red 1, Acid Red 14, Acid Red 18, Acid Red 27, Acid Red 50, Acid Red 52, Acid Red 73, Acid Red 87, Acid Red 88, Acid Red 92, Acid Red 155, Acid Red 180, Acid Violet 9, Acid Violet 43, Acid Violet 49, Acid Yellow 1, Acid Yellow 23, Acid Yellow 3, Food Yellow No.8, D&C Brown No.1, D&C Green No.5, D&C Green No.8, D&C Orange No. 4, D&C Orange No. 10, D&C Orange No. 11, D&C Red No. 21, D&C Red No. 27, D&C Red No. 33, D&C Violet 2, D&C Yellow No. 7, D&C Yellow No. 8, D&C Yellow No. 10, FD&C Red 2, FD&C Red 40, FD&C Red No. 4, FD&C Yellow No. 6, FD&C Blue 1, Food Black 1, Food Black 2, Disperse Black 9 and Disperse Violet 1, as well as their alkali metal salts, such as sodium salts and potassium salts. Among these, the most preferred anionic stains are Acid Red 52, DC Violet 2, DC Red 33, DC Orange 4, DC Red 27, DC Yellow 10, HC Blue 18, HC Red 18 and HC Yellow 16.

[0031] Suitable cationic dyes are, in principle, dyes available on the market for hair coloring applications for cosmetic purposes. For this purpose, the PCT application WO95 / 15144 of Ciba-Geigy AG is particularly mentioned. Some examples of these include Basic Blue 6, Basic Blue 7, Basic Blue 9, Basic Blue 26, Basic Blue 41, Basic Blue 99, Basic Brown 4, Basic Brown 16, Basic Brown 17, Natural Brown 7, Basic Green 1, Basic Red 2, Basic Red 12, Basic Red 22, Basic Red 76, Basic Violet 1, Basic Violet 2, Basic Violet 3, Basic Violet 10, Basic Violet 14, Basic Yellow 57, Basic Red 51, Basic Yellow 87, HC Blue 17, and Basic Orange 31. The most preferred colors are Basic Red 51, Basic Yellow 87, Basic Orange 31, HC Blue 17, and Basic Blue 124.

[0032] Suitable neutral dyes including nitro dyes are HC Blue No.2, HC Blue No.4, HC Blue No.5, HC Blue No.6, HC Blue No.7, HC Blue No.8, HC Blue No.9, HC Blue No.10, HC Blue No.11, HC Blue No.12, HC Blue No.13, HC Brown No.1, HC Brown No.2, HC Green No.1, HC Orange No.1, HC Orange No.2, HC Orange No.3, HC Orange No.5, HC Red BN, HC Red No.1, HC Red No.3, HC Red No.7, HC Red No.8, HC Red No.9, HC Red No.10, HC Red No.11, HC Red No.13, HC Red No.54, HC Red No.14, HC Violet BS, HC Violet No.1, HC Violet No.2, HC Yellow No.2, HC Yellow No.4, HC Yellow No.5, HC Yellow No.6, HC Yellow No.7, HC These are Yellow No. 8, HC Yellow No. 9, HC Yellow No. 10, HC Yellow No. 11, HC Yellow No. 12, HC Yellow No. 13, HC Yellow No. 14, HC Yellow No. 15, 2-amino-6-chloro-4-nitrophenol, picramic acid, 1-hydroxy-2-amino-3-nitrobenzol, and 2-hydroxyethylpicramic acid.

[0033] From the viewpoint of dyeing strength and wash fastness, it is preferable that one or more direct dyes be selected from HC Blue 18, HC Red 18, HC Yellow 16, Disperse Black 9, Acid Yellow 1, 2-amino-6-chloro-4-nitrophenol, and / or salts thereof and / or mixtures thereof.

[0034] From the viewpoint of color intensity, the total concentration of the direct dye is preferably 0.001% by weight or more, more preferably 0.005% by weight or more, and even more preferably 0.01% by weight or more, relative to the total weight of composition A.

[0035] From the viewpoint of color intensity and economic reasons, the total concentration of the direct dye is preferably 10% by weight or less, more preferably 5% by weight or less, even more preferably 3% by weight or less, even more preferably 1.5% by weight or less, and even more preferably 1% by weight or less, based on the total weight of composition A.

[0036] To obtain the above effects, the total concentration of the direct dye is preferably 0.001% to 10% by weight, more preferably 0.005% to 5% by weight, more preferably 0.01% to 3% by weight, even more preferably 0.01% to 1.5% by weight, and even more preferably 0.01% to 1% by weight, relative to the total weight of composition A.

[0037] Shape of composition A Composition A of the present invention may be available in various cosmetic forms, such as liquid compositions (aqueous or non-aqueous) or powder compositions.

[0038] aqueous composition In one aspect of the present invention, composition A is an aqueous composition.

[0039] The term "aqueous" refers to a composition that is mostly water, that is, composition A contains water in an amount of preferably 50% by weight or more, more preferably 60% by weight or more, still more preferably 70% by weight or more, and still more preferably 80% by weight or more, based on the total weight of composition A, from the viewpoint of achieving a composition that is acceptable as a cosmetic.

[0040] From the viewpoint of dyeing strength, it is even more preferable that composition A contains water in an amount of 98% by weight or less, more preferably 95% by weight or less, and even more preferably 92% by weight or less, relative to the total weight of composition A.

[0041] To achieve the above effects, the total concentration of water in composition A is preferably 50% to 98% by weight, more preferably 60% to 95% by weight, even more preferably 70% to 92% by weight, and still more preferably 80% to 92% by weight, based on the total weight of composition A.

[0042] From the viewpoint of dyeing performance, the pH of composition A is preferably 7 or higher, more preferably 7.5 or higher, even more preferably 8 or higher, and still more preferably 9 or higher.

[0043] From the viewpoint of hair damage and dyeing performance, the pH of composition A is preferably 12 or less, more preferably 11 or less, and even more preferably 10.5 or less.

[0044] To obtain the above effects, composition A preferably has a pH of 7 to 12, preferably 7.5 to 11, more preferably 8 to 10.5, and even more preferably 9 to 10.5.

[0045] Therefore, the present disclosure also relates to cosmetic products for dyeing keratin fibers, preferably for dyeing human keratin fibers, and more preferably for dyeing human hair. - Composition A comprising one or more alkalizing agents and one or more direct dyes, - Has a pH of 1-6, a) Hydrogen peroxide and b) One or more compounds selected from the following group:

[0046] [ka] [In the formula, R1, R2, and R3 are independently selected from H and CH3, and / or mixtures thereof]. 2) One or more orthodiphenols and / or derivatives thereof, and / or mixtures thereof and / or salts thereof 3) One or more imidazolidine-2,4-diones and / or derivatives thereof, and / or mixtures thereof and / or salts thereof Aqueous composition B containing Includes, Composition A is an aqueous composition containing 50% by weight or more of water and having a pH of 7 to 12. The product is the target.

[0047] Optionally, composition A may further contain one or more organic solvents, as defined for compositions containing less than 1% by weight of water. Preferably, these solvents include benzyl alcohol, ethanol, and phenoxyethanol. A preferred concentration is 1% to 10% by weight of composition A.

[0048] Liquid composition containing less than 1% by weight of water In another aspect of the present invention, composition A is a liquid composition at 25°C and atmospheric pressure, comprising one or more organic solvents and less than 1% by weight of water relative to the total weight of composition A. From the viewpoint of dye stability, the composition is preferably anhydrous.

[0049] The term "liquid" refers to the physical state at 25°C and atmospheric pressure; that is, the dyeing composition is liquid at room temperature.

[0050] The term "anhydrous" refers to a composition that does not contain added water. This does not exclude the presence of residual water from the air or from crystal water bound to the components.

[0051] In this embodiment of the present invention, composition A may contain one or more organic solvents.

[0052] Organic solvents may be selected to dissolve alkylating agents and dyes. Preferred solvents are monohydric, dihydric, and trihydric alcohols, and / or mixtures thereof.

[0053] From the standpoint of cosmetic safety and solubility, preferred monohydric, dihydric, and trihydric alcohols are ethanol, n-propanol, isopropanol, propylene glycol, ethylene glycol, benzyl alcohol, phenoxyethanol, and glycerol, and / or mixtures thereof.

[0054] From the viewpoint of solution stability, the total concentration of the organic solvent is more preferably 75% by weight or more, more preferably 80% by weight or more, and even more preferably 85% by weight or more, relative to the total weight of composition A.

[0055] From the viewpoint of staining strength, the total concentration of the organic solvent is preferably 98% by weight or less, more preferably 95% by weight or less, and even more preferably 92% by weight or less, relative to the total weight of composition A.

[0056] To obtain the above effects, the total concentration of the organic solvent is preferably 75% to 98% by weight, more preferably 80% to 95% by weight, and even more preferably 85% to 92% by weight, relative to the total weight of composition A.

[0057] Therefore, the present disclosure also relates to cosmetic products for dyeing keratin fibers, preferably for dyeing human keratin fibers, and more preferably for dyeing human hair. - Composition A comprising one or more alkalizing agents and one or more direct dyes, - Has a pH of 1-6, a) Hydrogen peroxide and b) One or more compounds selected from the following group:

[0058] [ka] [In the formula, R1, R2, and R3 are independently selected from H and CH3, and / or mixtures thereof]. 2) One or more orthodiphenols and / or derivatives thereof, and / or mixtures thereof and / or salts thereof 3) One or more imidazolidine-2,4-diones and / or derivatives thereof, and / or mixtures thereof and / or salts thereof Aqueous composition B containing Includes, Composition A is a liquid composition at 25°C and normal pressure, containing one or more organic solvents and less than 1% by weight of water, preferably an anhydrous form. The product is the target.

[0059] powder composition In one aspect of the present invention, composition A may be a powder composition.

[0060] The term "powder" refers to a composition that is solid at 25°C and atmospheric pressure. This term applies to freely flowing powders and compressed powders, such as tablets. Powder compositions may also contain water, as long as the properties of the solid state at 25°C remain unchanged. Depending on the type of powder, a water content of 10% by weight or less is permissible relative to the total weight of composition A. This does not exclude the presence of residual moisture from the air or from crystal water bound to the components. From the viewpoint of stability, composition A is preferably an anhydrous powder composition.

[0061] From the viewpoint of composition stability and ease of use, composition A preferably contains one or more powdered excipients.

[0062] The term "excipient" refers to a compound that may function as a filler and as a dispersant for other compounds in composition A, does not react with dyes and alkalizing agents, and therefore gives the powder a high degree of storage stability over long periods.

[0063] Composition A of the present invention may contain organic and / or inorganic powdered excipients in which an alkalizing agent and a direct dye are dispersed.

[0064] Suitable organic and / or inorganic powdered excipients include, for example, diatomaceous earth, kaolin, bentonite, starch, especially corn, tapioca, rice, wheat and potato, nylon powder, montmorillonite, gypsum, sawdust and perlite.

[0065] From the viewpoint of achieving good dispersibility of the direct dye in the powder and rapid dissolution of the powder, the total concentration of the organic and / or inorganic powdered excipients is preferably 50% by weight or more, more preferably 55% by weight or more, even more preferably 60% by weight or more, even more preferably 65% ​​by weight or more, even more preferably 70% by weight or more, and even more preferably 75% by weight or more, based on the total weight of composition A.

[0066] From the viewpoint of achieving good dispersibility of direct dyes in powder and freedom of formulation, the total concentration of organic and / or inorganic powdered excipients is preferably 98% by weight or less, more preferably 95% by weight or less, and even more preferably 90% by weight or less, based on the total weight of composition A.

[0067] To obtain the above effects, the total concentration of the organic and / or inorganic powdered excipients is preferably 50% to 98% by weight, more preferably 55% to 95% by weight, even more preferably 60% to 90% by weight, still more preferably 65% ​​to 90% by weight, still more preferably 70% to 90% by weight, and even more preferably 75% to 90% by weight, based on the total weight of composition A.

[0068] Therefore, the present disclosure also relates to cosmetic products for dyeing keratin fibers, preferably for dyeing human keratin fibers, and more preferably for dyeing human hair. - Composition A comprising one or more alkalizing agents and one or more direct dyes, - Has a pH of 1-6, a) Hydrogen peroxide and b) One or more compounds selected from the following group:

[0069] [ka] [In the formula, R1, R2, and R3 are independently selected from H and CH3, and / or mixtures thereof]. 2) One or more orthodiphenols and / or derivatives thereof, and / or mixtures thereof and / or salts thereof 3) One or more imidazolidine-2,4-diones and / or derivatives thereof, and / or mixtures thereof and / or salts thereof Aqueous composition B containing Includes, Composition A is a powdered composition and contains one or more powdered excipients. The product is the target.

[0070] In one aspect of the present invention, composition A is a decolorizing powder composition, and decolorizing powder composition D contains one or more decolorizing compounds, as will be described in detail below.

[0071] Therefore, the present disclosure also relates to cosmetic products for dyeing keratin fibers, preferably for dyeing human keratin fibers, and more preferably for dyeing human hair. - Composition A comprising one or more alkalizing agents and one or more direct dyes, - Has a pH of 1-6, a) Hydrogen peroxide and b) One or more compounds selected from the following group:

[0072] [ka] [In the formula, R1, R2, and R3 are independently selected from H and CH3, and / or mixtures thereof]. 2) One or more orthodiphenols and / or derivatives thereof, and / or mixtures thereof and / or salts thereof 3) One or more imidazolidine-2,4-diones and / or derivatives thereof, and / or mixtures thereof and / or salts thereof Aqueous composition B containing Includes, Composition A is a decolorizing powder composition containing one or more decolorizing compounds. The product is the target.

[0073] Aqueous composition B The aqueous composition B of the present invention has a pH of 1 to 6. a) Hydrogen peroxide and b) One or more compounds selected from the following group:

[0074] [ka] [In the formula, R1, R2, and R3 are independently selected from H and CH3, and / or mixtures thereof]. 2) One or more orthodiphenols and / or derivatives thereof, and / or mixtures thereof and / or salts thereof 3) One or more imidazolidine-2,4-diones and / or derivatives thereof, and / or mixtures thereof and / or salts thereof Includes.

[0075] From the viewpoint of storage stability and safety of the composition, the pH of composition B is preferably 1.25 or higher, more preferably 1.5 or higher, and even more preferably 2 or higher.

[0076] From the viewpoint of the storage stability of the composition, the pH of composition B is preferably 5 or less, more preferably 4 or less, and even more preferably 3 or less.

[0077] To obtain the above effects, the pH of composition B is preferably 1.25 to 5, more preferably 1.5 to 4, and even more preferably 2 to 3.

[0078] From the viewpoint of product performance, the concentration of compound a) is more preferably 0.1% by weight or more, more preferably 0.25% by weight or more, and even more preferably 1% by weight or more, relative to the total weight of composition B.

[0079] From the viewpoint of product performance and user safety, the concentration of compound a) is more preferably 20% by weight or less, more preferably 15% by weight or less, and even more preferably 12% by weight or less, relative to the total weight of composition B.

[0080] To obtain the above effects, the concentration of compound a) is preferably more than 0.1% to 20% by weight, more preferably 0.25% to 15% by weight, and even more preferably 1% to 12% by weight, based on the total weight of composition B.

[0081] Composition B includes the following compounds from group b1):

[0082] [ka] [In the formula, R1, R2, and R3 are independently selected from H and CH3.] It comprises one or more compounds selected from and / or mixtures thereof. These compounds are xanthines and their derivatives.

[0083] A suitable xanthine and / or xanthine derivative represented by the structure of compound b1) is: - Xanthine, where R1=R2=R3=H - Theobromine where R1=R3=CH3 and R2=H, - Theophylline in which R2=R3=CH3 and R1=H - Caffeine where R1=R2=R3=CH3 That is the case.

[0084] A mixture of the above compounds is also preferred.

[0085] From an economic standpoint, one or more compounds in group b1) are preferably caffeine and / or theobromine, and / or mixtures thereof, and preferably caffeine.

[0086] From the standpoint of commercial availability, one or more compounds from group b2) of composition B are - Flavonol, - Anthocyanidins, - Anthocyanin or anthocyanin, - Orthohydroxybenzoate, - Flavones, - Hydroxystilbene, - 3,4-dihydroxyphenylalanine and its derivatives, - 2,3-dihydroxyphenylalanine and its derivatives, - 4,5-dihydroxyphenylalanine and its derivatives, - Dihydroxycinnamate, - Orthopolyhydroxycoumarin, - Orthopolyhydroxyisocoumarin, - Orthopolyhydroxycoumarine, - Orthopolyhydroxyisocoumarine, - Orthopolyhydroxychalcone, - Orthopolyhydroxychromone, - Orthopolyhydroxyquinone, - Orthohydroxyxanthone, - 1,2-dihydroxybenzene and its derivatives, - 1,2,4-trihydroxybenzene and its derivatives, - 1,2,3-trihydroxybenzene and its derivatives, - 2,4,5-trihydroxybenzene and its derivatives, - Proanthocyanidins, - Proanthocyanidins, - Tannic acid, - Ellagic acid, - One or more compounds represented by the following general structure:

[0087] [ka] [In the formula, R4, R5 and R6 are independently H, OH, halogen, C1-C] 12 Selected from linear or branched alkyl or alkenyl groups, OX, NO2, COOH, SO3H, aryl, heteroaryl groups, and / or salts thereof and / or mixtures thereof, where X is C1-C 12 [It is a linear or branched alkyl group.] as well as / or their salts and / or mixtures thereof It is preferable to select from the following.

[0088] From the standpoint of commercial availability, one or more compounds from group b2) of composition B have the following general structure:

[0089] [ka] [In the formula, R4, R5 and R6 are independently H, OH, halogen, C1-C] 12 Selected from linear or branched alkyl or alkenyl groups, OX, NO2, COOH, SO3H, aryl, heteroaryl groups, and / or salts thereof and / or mixtures thereof, where X is C1-C 12 [It is a linear or branched alkyl group.] It is preferable to select from the following.

[0090] From the standpoint of staining intensity, for group b2), R4 is H, OH, halogen, C1~C 12 Selected from linear or branched alkyl or alkenyl, OX, NO2, COOH, SO3H, aryl, heteroaryl, where X is C1-C 12 It is a linear or branched alkyl group, and R5 and R6 are independently C1-C 12Selected from linear or branched alkyl or alkenyl, O-X, NO2, COOH, SO3H, and / or their salts and / or their mixtures, where X is C1-C 12 is preferably linear or branched alkyl.

[0091] Preferably, one or more compounds of group b2) are

[0092]

Chemical formula

[0093] From the perspective of commercial availability, one or more compounds from group b3) of composition B have the following general structure:

[0094]

Chemical formula

[0095] From the perspective of commercial availability and dyeing strength, one or more compounds from group b3) of composition B are hydantoin or allantoin, and / or their salts and / or their mixtures, and preferably, hydantoin and / or its salt is preferred.

[0096] Therefore, the disclosure of the present invention also relates to cosmetic products for dyeing keratin fibers, preferably for dyeing human keratin fibers, and more preferably for dyeing human hair. - Composition A comprising one or more alkalizing agents and one or more direct dyes, - Has a pH of 1-6, a) Hydrogen peroxide and b) One or more compounds selected from the following group: 1) Caffeine and / or theobromine, and / or mixtures thereof, 2) Tyrone and / or its salt, 3) Hydantoin and / or salts thereof, and / or mixtures thereof Aqueous composition B containing This applies to products that include the following:

[0097] From the viewpoint of stabilization performance, the total concentration of compound b) is more preferably 0.001% by weight or more, more preferably 0.005% by weight or more, even more preferably 0.01% by weight or more, and still more preferably 0.03% by weight or more, relative to the total weight of composition B.

[0098] For economic reasons and from the viewpoint of stabilization performance, the total concentration of compound b) is more preferably 0.5% by weight or less, more preferably 0.25% by weight or less, even more preferably 0.2% by weight or less, and still more preferably 0.15% by weight or less, relative to the total weight of composition B.

[0099] To obtain the above effects, from the viewpoint of stabilization and staining strength, the total concentration of compound b) is preferably 0.001% to 0.5% by weight, preferably 0.005% to 0.25% by weight, more preferably 0.01% to 0.2% by weight, and even more preferably 0.03% to 0.15% by weight, relative to the total weight of composition B.

[0100] From the viewpoint of stabilization performance, the weight ratio of compounds a) and b) in composition B is preferably 2 or more, more preferably 20 or more, even more preferably 37.5 or more, and even more preferably 100 or more.

[0101] From the viewpoint of stabilization performance, the weight ratio of compounds a) and b) in composition B is preferably 1,000 or less, more preferably 600 or less, even more preferably 400 or less, and even more preferably 150 or less.

[0102] To achieve the above effects, the weight ratio of compounds a) and b) in composition B is preferably 2 to 1,000, more preferably 20 to 600, even more preferably 37.5 to 400, and even more preferably 100 to 150.

[0103] Shape of composition B From the viewpoint of cosmetic safety and user-friendliness, composition B of the present invention is an emulsion, a thickening gel, or a combination thereof. It may contain a lipophilic compound of group c) and / or a surfactant of group d).

[0104] Lipophilic compounds as compounds of group c) Compositions A and / or B of the present invention may be formulated as emulsions and / or thickened emulsions. In this case, compositions A and / or B preferably contain one or more lipophilic compounds as compounds of group c).

[0105] From the viewpoint of cosmetic compatibility, preferably, the compounds of group c) are C 12 ~C 22 Aliphatic alcohols, C3-C 22 Alcohol and C 12 ~C 22 Esters with fatty acids, C8~C 22 Selected from fatty acids, vegetable oils and / or silicones and / or hydrocarbon products, and / or mixtures thereof.

[0106] Suitable C12 ~C 22 Aliphatic alcohols include myristyl alcohol, cetyl alcohol, stearyl alcohol, behenyl alcohol, and cetearyl alcohol.

[0107] C3~C 22 Alcohol and C 12 ~C 22 Suitable esters with fatty acids are isopropyl myristate, isopropyl palmitate, and myristyl myristate.

[0108] Suitable C8~C 22 The fatty acids are oleic acid, linoleic acid, and palmitic acid.

[0109] Suitable vegetable oils include olive oil, almond oil, sunflower oil, and argan oil.

[0110] Preferred silicones are non-aminational and / or aminational silicones. The latter is commonly known as amodimethicone.

[0111] From the viewpoint of forming a stable composition and ease of use for the user, the total concentration of the compounds in group c) is preferably 1% by weight or more, more preferably 2% by weight or more, and even more preferably 3% by weight or more, based on the total weight of each of compositions A and / or B.

[0112] From the viewpoint of forming a stable composition, the total concentration of the compounds in group c) is preferably 20% by weight or less, more preferably 15% by weight or less, and even more preferably 12% by weight or less, based on the total weight of each of compositions A and / or B.

[0113] To obtain the above effects, the total concentration of the compounds in group c) is 1% to 20% by weight, preferably 2% to 15% by weight, and more preferably 3% to 12% by weight, based on the total weight of each of compositions A and / or B.

[0114] Surfactants as compounds of group d) From the viewpoint of stabilizing the composition and improving wetting and mixing properties, composition A and / or B of the present invention may further contain one or more surfactants as compounds of group d), preferably selected from nonionic surfactants, anionic surfactants, cationic surfactants and / or amphoteric / zwitterionic surfactants and / or salts thereof and / or mixtures thereof, and more preferably, one or more surfactants selected from anionic surfactants and / or salts thereof.

[0115] Preferably, the anionic surfactant can be selected from ethoxylated or non-ethoxylated alkyl ether sulfate surfactants, alkyl sulfates, ethoxylated and / or non-ethoxylated alkyl carbonates, ethoxylated or non-ethoxylated amino acid surfactants, and / or mixtures thereof and / or salts thereof.

[0116] A preferred example is C 10 ~C 22 The surfactant is an alkyl sulfate, or preferably an ethoxylated alkyl ether sulfate surfactant, having an alkyl chain length and a degree of ethoxylation of 1 to 50, or a mixture thereof and / or a salt thereof.

[0117] Suitable nonionic surfactants may be selected from alkyl polyglycosides, ethoxylated triglycerides, ethoxylated aliphatic alcohols, ethoxylated fatty acid esters, and / or mixtures thereof.

[0118] Suitable cationic surfactants are C 12 ~C 22 A quaternary ammonium surfactant having a carbon chain length, a tertiary amine group and C 12 ~C 22A surfactant having at least one alkyl chain having a carbon chain length of , for example, alkylamide alkylamine surfactants and / or salts thereof. Preferred examples are cetrimonium chloride and behentrimonium chloride.

[0119] Preferred amphoteric / zwitterionic surfactants are of the betaine type. Preferred compounds can be selected from alkylbetaines and / or alkylamide betaines. A preferred compound selected from alkylbetaines is lauryl betaine. A preferred compound selected from alkylamide betaines is cocamidopropyl betaine. This disclosure also relates to salts of such compounds.

[0120] From the viewpoint of enhancing the wettability of keratin fibers, physical stability, and miscibility with other compositions, a suitable concentration range for the surfactant is 0.1% to 10% by weight relative to the total weight of each of compositions A and / or B.

[0121] Thickening polymer From the viewpoint of cosmetic safety, it is even more preferable that composition A and / or B of the present invention contain one or more thickening polymers.

[0122] Compositions A and / or B of the present invention may contain one or more thickening polymers selected from nonionic thickening polymers and / or anionic thickening polymers, and / or mixtures thereof.

[0123] Preferably, the thickening polymer is selected from polymers that have a viscosity of at least 1,000 mPa·s and form an aqueous solution and / or aqueous dispersion with a pH of 1 to 6, measured using a Brookfield viscometer (e.g., with a suitable spindle at 25°C for 1 minute at 10 rpm) at a polymer concentration of 1% by weight relative to the total weight of the composition in water at 25°C.

[0124] Suitable nonionic thickening polymers are cellulose-based polymers. Suitable examples of cellulose-based polymers include methylcellulose, hydroxymethylcellulose, hydroxyethylcellulose, hydroxypropylcellulose, hydroxyethyl-methylcellulose, and alkylated hydroxycellulose, such as (C2-C8)-alkylcellulose or cetylhydroxyethylcellulose.

[0125] Suitable anionic thickening polymers are selected from natural anionic polymers and / or synthetic anionic polymers.

[0126] Preferably, the natural anionic polymer can be selected from xanthan gum, dehydroxanthan gum, hydroxypropylxanthan gum, carboxymethylcellulose, and starch-based polymers, such as plant starch and / or synthetically modified derivatives thereof, such as hydroxypropyl starch phosphate. Equally preferred are alginic acid, sodium alginate, ammonium alginate, calcium alginate, gum arabic, and guar gum.

[0127] Suitable synthetic anionic polymers are associative thickening polymers, such as acrylates / steareth-30 methacrylate copolymers.

[0128] From the viewpoint of biodegradability and low environmental impact, preferred thickening polymers for the compositions of the present invention are natural anionic polymers, more preferably xanthan gum and / or dehydroxanthan gum.

[0129] From the viewpoint of imparting sufficient viscosity to composition A and / or B, preferably the total concentration of the thickening polymer in composition A and / or B of the present invention is 0.1% by weight or more, more preferably 0.25% by weight or more, and more preferably 0.5% by weight or more, based on the total weight of each of composition A and / or B.

[0130] From the viewpoint of imparting sufficient viscosity to composition A and / or B, and from the viewpoint of product cost, preferably the total concentration of the thickening polymer in composition A and / or B of the present invention is 15% by weight or less, more preferably 12% by weight or more, and even more preferably 10% by weight or less, based on the total weight of each of composition A and / or B.

[0131] To obtain the above effects, the total concentration of the thickening polymer in composition A and / or B of the present invention is preferably 0.1% to 15% by weight, preferably 0.25% to 12% by weight, and more preferably 0.5% to 10% by weight, based on the total weight of each of compositions A and / or B.

[0132] From the viewpoint of cosmetic safety, compositions A and / or B of the present invention preferably have a viscosity of 1,000 mPas to 25,000 mPas, preferably 2,000 mPas to 20,000 mPas, and more preferably 2,500 mPas to 17,500 mPas, as determined by cone-plate viscometery at 25°C and atmospheric pressure. A suitable viscometer is a Brookfield viscometer having spindle #4.

[0133] Parts kit The present invention also includes compositions A and B as defined above, - A decolorizing powder composition C comprising one or more perate and / or peroxide salts, and one or more alkalizing agents. - A water-based brightening composition D containing one or more alkalizing agents and having a pH of 7 to 12, - Aqueous dyeing composition E having a pH of 7-12 and containing one or more dyes selected from oxidation dye precursors, oxidation dye couplers and / or direct dyes, and / or salts thereof and / or mixtures thereof. The subject is a kit of parts comprising one or more compositions selected from the following.

[0134] Decolorizing powder composition C Decolorizing powder composition C is more preferably comprising one or more perate and / or peroxide salts as decolorizing compounds, and one or more alkalizing agents.

[0135] Suitable perate and / or peroxide salts are sodium persulfate, potassium persulfate, ammonium persulfate, alkaline earth peroxides such as magnesium peroxide, melamine peroxide or urea peroxide, or phthalimidoperoxyhexanoic acid. From the viewpoint of decolorizing power, preferred perate are sodium persulfate, potassium persulfate and ammonium persulfate.

[0136] From the viewpoint of decolorizing power and cosmetic safety, the total concentration of perate and / or peroxide salts in decolorizing powder composition C is preferably 10% to 80% by weight, preferably 15% to 70% by weight, more preferably 20% to 60% by weight, and even more preferably 25% to 60% by weight, based on the total weight of decolorizing powder composition C.

[0137] Decolorizing powder composition C further comprises one or more alkalizing agents. Suitable alkalizing agents are metasilicates and disilicates, particularly sodium metasilicate and / or sodium disilicate. From the viewpoint of alkalinity, the concentration of metasilicates and / or disilicates, and / or their salts, in decolorizing powder composition C is preferably 1% to 20% by weight, and more preferably 5% to 15% by weight, based on the total weight of decolorizing powder composition C.

[0138] Other suitable alkalizing agents are alkali salts of carbonates and bicarbonates, such as sodium salts, potassium salts, and ammonium salts. From the viewpoint of buffering ability, preferred salts are salts of bicarbonates, with ammonium bicarbonate being particularly preferred. From the viewpoint of buffering ability and low hair damage, the preferred concentration of carbonate in the decolorizing powder composition is preferably 0.25% to 10% by weight, preferably 0.5% to 7.5% by weight, more preferably 0.75% to 5% by weight, and even more preferably 1% to 4% by weight, based on the total weight of the decolorizing powder composition C.

[0139] Aqueous lightening composition D From the standpoint of user convenience, as disclosed for compositions A and / or B, preferably, aqueous brightening composition D is an emulsion containing one or more lipophilic compounds from group c).

[0140] From the viewpoint of lightening performance, the aqueous lightening composition preferably has a pH of 8 to 11, more preferably 8.5 to 10.5. Suitable alkalizing agents for aqueous dyeing composition E are disclosed below.

[0141] Aqueous dye composition E Aqueous dyeing composition E comprises one or more oxidation dye precursors, such as p-phenylenediamine and / or its derivatives, p-aminophenol and / or its derivatives, and heterocyclic compounds, such as diaminopyrazole and substituted pyrimidines, and / or their derivatives and / or their salts.

[0142] Furthermore, in addition to the oxidation dye precursor, aqueous dye composition E contains an oxidation dye coupler. Suitable oxidation dye couplers are resorcinol and / or its derivatives, m-aminophenol and / or its derivatives, m-phenylenediamine and / or its derivatives, pyridine and / or its derivatives, and naphthol and / or its derivatives, and / or salts thereof.

[0143] Furthermore, aqueous dyeing composition E may contain one or more direct hair dyes.

[0144] The preferred total concentration of the oxidation dye precursor and / or oxidation dye coupler and / or direct dye is 0.001% to 5% by weight, preferably 0.01% to 4% by weight, more preferably 0.05% to 3% by weight, and even more preferably 0.1% to 2% by weight, based on the total weight of the aqueous dyeing composition D.

[0145] Preferably, aqueous dyeing composition E contains one or more alkalizing agents. Preferably, the one or more alkalizing agents are ammonia, general structure:

[0146] [ka] [wherein R7, R8, and R9 are selected from alkyl or alkanolamines represented by H, C1-C4 alkyl, C3-C4 unsaturated alkyl, C3-C4 branched alkyl, C1-C4 hydroxyl alkyl, C3-C4 unsaturated hydroxyl alkyl, and C3-C4 branched hydroxyl alkyl, provided that R7, R8, and R9 are the same or different, and at least one of R7, R8, or R9 is different from H].

[0147] From the viewpoint of staining intensity, the alkalizing agent is preferably selected from ammonia and / or monoethanolamine and / or 2-aminomethylpropanol and / or tris-(hydroxymethyl)-aminomethane.

[0148] From the viewpoint of sufficient alkalinity and dyeing strength, the total concentration of the alkalizing agent in aqueous dyeing composition E is more preferably 0.25% to 15% by weight, more preferably 0.5% to 12.5% ​​by weight, even more preferably 0.75% to 10% by weight, and even more preferably 1% to 7.5% by weight, based on the total weight of aqueous dyeing composition E.

[0149] The aqueous staining composition E has a pH of 7 to 12. From the viewpoint of buffering capacity, the pH of the aqueous staining composition E is preferably 7.5 to 11, more preferably 8.0 to 10, and even more preferably 8.5 to 9.5.

[0150] Dyeing method The present invention also relates to a method for dyeing keratin fibers, preferably human keratin fibers, more preferably human hair, i) A step of preparing compositions A and B as defined above, ii) A step of mixing the compositions together to obtain a ready-to-use composition having a pH of 7 to 12. iii) The step of applying the composition prepared for use to keratin fibers, iv) Allow to stand for 1 to 60 minutes, and optionally heat the keratin fibers to a temperature of 40°C to 60°C. v) Rinse the keratin fibers and optionally shampoo the keratin fibers. This applies to methods that include [specific methods].

[0151] Preferably, the pH of the composition prepared immediately before use is 7 to 12. From the viewpoint of accelerating staining, the pH of the composition prepared immediately before use is preferably 7.5 to 11, and more preferably 8.0 to 10.5.

[0152] Next, the composition prepared for use is applied to the keratin fibers and left to stand for 1 to 60 minutes as defined in step iv). From the viewpoint of sufficient decolorization / lightening, the preferred time range for step iv) is 5 to 45 minutes, and the more preferred range is 10 to 35 minutes.

[0153] Optionally, heat may be applied while the composition prepared for use is standing on the keratin fibers. A suitable temperature range is 30°C to 50°C.

[0154] Use of compounds The present invention also provides a method for improving the color intensity and / or wash fastness of direct dyes on keratin fibers, preferably on human keratin fibers, more preferably on human hair.

[0155] [ka]

[0156] [In the formula, R1, R2, and R3 are independently selected from H and CH3, and / or mixtures thereof]. 2) One or more orthodiphenols and / or derivatives thereof, and / or mixtures thereof and / or salts thereof 3) One or more imidazolidine-2,4-diones and / or derivatives thereof, and / or mixtures thereof and / or salts thereof This applies to the use of one or more compounds selected from the following.

[0157] From the viewpoint of stabilization, it is preferable that the one or more compounds in 1) are the one or more compounds defined as b1) above.

[0158] From the viewpoint of stabilization, it is preferable that the one or more compounds in 2) are the one or more compounds defined as b2) above.

[0159] From the viewpoint of stabilization, it is preferable that the one or more compounds in 3) are the one or more compounds defined as b3) above.

[0160] This disclosure also states, <1> A cosmetic product for dyeing keratin fibers, preferably for dyeing human keratin fibers, and more preferably for dyeing human hair, - Composition A comprising one or more alkalizing agents and one or more direct dyes, - Has a pH of 1-6, a) Hydrogen peroxide and b) One or more compounds selected from the following group: a) Hydrogen peroxide and b) One or more compounds selected from the following group:

[0161] [ka] [In the formula, R1, R2, and R3 are independently selected from H and CH3, and / or mixtures thereof]. 2) One or more orthodiphenols and / or derivatives thereof, and / or mixtures thereof and / or salts thereof 3) One or more imidazolidine-2,4-diones and / or derivatives thereof, and / or mixtures thereof and / or salts thereof Aqueous composition B containing This applies to products that include the following:

[0162] <2> One or more alkalizing agents in composition A are one or more organic alkalizing agents and / or salts thereof, and / or ammonia and / or salts thereof. <1> The products listed.

[0163] <3> One or more organic alkalizing agents of composition A are selected from alkyl and / or alkanolamines and / or their salts, more preferably these / they are selected from monoethanolamine, diethanolamine, monoethanolmethylamine, monoethanoldimethylamine, diethanolmethylamine, monoethanolethylamine, monoethanoldiethylamine, diethanolethylamine, monoethanolpropylamine, monoethanoldipropylamine, diethanolpropylamine, monoethanolbutylamine, diethanolbutylamine, trimethylamine, triethylamine, 2-amino-2-methylpropanol, tris-(hydroxymethyl)-aminomethane and / or their salts and / or mixtures thereof. <1> ~ <2> Products listed in any of the following.

[0164] <4> One or more alkalizing agents of composition A are selected from monoethanolamine, 2-amino-2-methylpropanol, tris-(hydroxymethyl)-aminomethane and / or salts thereof, ammonia and / or salts thereof, and / or mixtures thereof. <1> ~ <3> Products listed in any of the following.

[0165] <5> One or more alkalizing agents in composition A are one or more inorganic alkalizing agents, preferably selected from metasilicates, carbonates and / or bicarbonates, and / or alkali salts or alkaline earth salts thereof, and / or mixtures thereof, more preferably sodium metasilicate. <1> ~ <4> Products listed in any of the following.

[0166] <6> The total concentration of the alkalizing agent, preferably one or more alkanolamines and / or their salts, and / or ammonia and / or its salts, is 0.1% to 40% by weight, preferably 0.25% to 30% by weight, and more preferably 0.5% to 25% by weight, relative to the total weight of composition A. <1> ~ <5> Products listed in any of the following.

[0167] <7> One or more direct dyes in composition A are selected from anionic, cationic, or neutral direct dyes, and / or salts thereof and / or mixtures thereof. <1> ~ <6> Products listed in any of the following.

[0168] <8> One or more anionic direct dyes are Acid Black 1, Acid Blue 1, Acid Blue 3, Food Blue 5, Acid Blue 7, Acid Blue 9, Acid Blue 74, Acid Orange 3, Acid Orange 6, Acid Orange 7, Acid Orange 10, Acid Red 1, Acid Red 14, Acid Red 18, Acid Red 27, Acid Red 50, Acid Red 52, Acid Red 73, Acid Red 87, Acid Red 88, Acid Red 92, Acid Red 155, Acid Red 180, Acid Violet 9, Acid Violet 43, Acid Violet 49, Acid Yellow 1, Acid Yellow 23, Acid Yellow 3, Food Yellow No.8, D&C Brown No.1, D&C Green No.5, D&C Green No.8, D&C Orange D&C Orange No. 4, D&C Orange No. 10, D&C Orange No. 11, D&C Red No. 21, D&C Red No. 27, D&C Red No. 33, D&C Violet 2, D&C Yellow No. 7, D&C Yellow No. 8, D&C Yellow No. 10, FD&C Red 2, FD&C Red 40, FD&C Red No. 4, FD&C Yellow No. 6, FD&C Blue 1, Food Black 1, Food Black 2, Disperse Black 9 and Disperse Violet 1, as well as their alkali metal salts, such as sodium salts and potassium salts. <1> ~ <7> Products listed in any of the above. Among these, the most preferred anionic staining substances are Acid Red 52, DC Violet 2, DC Red 33, DC Orange 4, DC Red 27, DC Yellow 10, HC Blue 18, HC Red 18, and HC Yellow 16, as well as / or salts thereof and / or mixtures thereof.

[0169] <9> One or more cationic dyes are Basic Blue 6, Basic Blue 7, Basic Blue 9, Basic Blue 26, Basic Blue 41, Basic Blue 99, Basic Brown 4, Basic Brown 16, Basic Brown 17, Natural Brown 7, Basic Green 1, Basic Red 2, Basic Red 12, Basic Red 22, Basic Red 76, Basic Violet 1, Basic Violet 2, Basic Violet 3, Basic Violet 10, Basic Violet 14, Basic Yellow 57, Basic Red 51, Basic Yellow 87, HC Blue 17, and Basic Orange 31. <1> ~ <8> Any of the products listed in the above. Most preferred are Basic Red 51, Basic Yellow 87, Basic Orange 31, HC Blue 17, and Basic Blue 124, and / or their salts and / or mixtures thereof.

[0170] <10> The one or more neutral dyes are HC Blue No.2, HC Blue No.4, HC Blue No.5, HC Blue No.6, HC Blue No.7, HC Blue No.8, HC Blue No.9, HC Blue No.10, HC Blue No.11, HC Blue No.12, HC Blue No.13, HC Brown No.1, HC Brown No.2, HC Green No.1, HC Orange No.1, HC Orange No.2, HC Orange No.3, HC Orange No.5, HC Red BN, HC Red No.1, HC Red No.3, HC Red No.7, HC Red No.8, HC Red No.9, HC Red No.10, HC Red No.11, HC Red No.13, HC Red No.54, HC Red No.14, HC Violet BS, HC Violet No.1, HC Violet No.2, HC Yellow No.2, HC Yellow No.4, HC Yellow No.5, HC Yellow No.6, HC Yellow No.7, HC Yellow No. 8, HC Yellow No. 9, HC Yellow No. 10, HC Yellow No. 11, HC Yellow No. 12, HC Yellow No. 13, HC Yellow No. 14, HC Yellow No. 15, 2-amino-6-chloro-4-nitrophenol, picramic acid, 1 and 2-hydroxyethylpicramic acid, and / or mixtures thereof. <1> ~ <9> Products listed in any of the following.

[0171] <11> One or more direct dyes are selected from HC Blue 18, HC Red 18, HC Yellow 16, Disperse Black 9, Acid Yellow 1, 2-amino-6-chloro-4-nitrophenol, and / or salts thereof and / or mixtures thereof. <1> ~ <10> Products listed in any of the following.

[0172] <12> The total concentration of the direct dye in composition A is 0.001% to 10% by weight, preferably 0.005% to 5% by weight, more preferably 0.01% to 3% by weight, even more preferably 0.01% to 1.5% by weight, and even more preferably 0.01% to 1% by weight, relative to the total weight of composition A. <1> ~ <11> Products listed in any of the following.

[0173] <13> Composition A is an aqueous composition. <1> ~ <12> Products listed in any of the following.

[0174] <14> The total concentration of water in composition A is 50% to 98% by weight, more preferably 60% to 95% by weight, even more preferably 70% to 92% by weight, and still more preferably 80% to 92% by weight, based on the total weight of composition A. <13> The products listed.

[0175] <15> The pH of composition A is 7 to 12, preferably 7.5 to 11, more preferably 8 to 10.5, and even more preferably 9 to 10.5. <13> ~ <14> Products listed in any of the following.

[0176] <16> Composition A is a liquid composition at 25°C and normal pressure, and comprises one or more organic solvents and less than 1% by weight of water relative to the total weight of composition A. <1> ~ <12> Products listed in any of the following.

[0177] <17> Composition A is an anhydrous, <16> The products listed.

[0178] <18> The organic solvent in composition A is a monohydric, dihydric, and trihydric alcohol, and / or a mixture thereof. <16> ~ <17> Products listed in any of the following.

[0179] <19> The organic solvent in composition A is ethanol, n-propanol, isopropanol, propylene glycol, ethylene glycol, benzyl alcohol, phenoxyethanol, and glycerol, and / or mixtures thereof. <16> ~ <18> Products listed in any of the following.

[0180] <20> The total concentration of the organic solvent in composition A is 75% to 98% by weight, more preferably 80% to 95% by weight, and even more preferably 85% to 92% by weight, relative to the total weight of composition A. <16> ~ <19> Products listed in any of the following.

[0181] <21> Composition A is a powder composition. <1> ~ <12> Products listed in any of the following.

[0182] <22> Composition A contains water in an amount of 10% by weight or less relative to the total weight of composition A, preferably an anhydrous form. <21> The products listed.

[0183] <23> Composition A contains one or more powdered excipients. <21> ~ <22> Products listed in any of the following.

[0184] <24> Composition A comprises one or more organic and / or inorganic powdered excipients. <23> The products listed.

[0185] <25> The organic and / or inorganic powdered excipients are diatomaceous earth, kaolin, bentonite, starch, in particular corn, tapioca, rice, wheat and potato, nylon powder, montmorillonite, gypsum, sawdust and perlite. <24> The products listed.

[0186] <26> The total concentration of organic and / or inorganic powdered excipients in composition A is 50% to 98% by weight, more preferably 55% to 95% by weight, even more preferably 60% to 90% by weight, even more preferably 65% ​​to 90% by weight, even more preferably 70% to 90% by weight, and even more preferably 75% to 90% by weight, based on the total weight of composition A. <23> ~ <25> Products listed in any of the following.

[0187] <27> The pH of composition B is 1.25 to 5, more preferably 1.5 to 4, and even more preferably 2 to 3. <1> ~ <26> Products listed in any of the following.

[0188] <28> The concentration of the compound of group a) in composition B is greater than 0.1% to 20% by weight, more preferably 0.25% to 15% by weight, and even more preferably 1% to 12% by weight, based on the total weight of composition B. <1> ~ <27> Products listed in any of the following.

[0189] <29> One or more compounds in group b1) of composition B are xanthine and / or xanthine derivatives, preferably xanthine, theobromine, theophylline, caffeine and / or mixtures thereof. <1> ~ <28> Products listed in any of the following.

[0190] <30> One or more compounds from group b1) of composition B are caffeine and / or theobromine, and / or mixtures thereof, preferably caffeine. <1> ~ <29> Products listed in any of the following.

[0191] <31> One or more compounds from group b2) of composition B are - Flavonol, - Anthocyanidins, - Anthocyanin or anthocyanin, - Orthohydroxybenzoate, - Flavones, - Hydroxystilbene, - 3,4-dihydroxyphenylalanine and its derivatives, - 2,3-dihydroxyphenylalanine and its derivatives, - 4,5-dihydroxyphenylalanine and its derivatives, - Dihydroxycinnamate, - Orthopolyhydroxycoumarin, - Orthopolyhydroxyisocoumarin, - Orthopolyhydroxycoumarine, - Orthopolyhydroxyisocoumarine, - Orthopolyhydroxychalcone, - Orthopolyhydroxychromone, - Ortho-polyhydroxyquinone, - Ortho-hydroxyxanthone, - 1,2-dihydroxybenzene and its derivatives, - 1,2,4-trihydroxybenzene and its derivatives, - 1,2,3-trihydroxybenzene and its derivatives, - 2,4,5-trihydroxybenzene and its derivatives, - Proanthocyanidin, - Procyanidin, - Tannic acid, - Ellagic acid, - One or more compounds represented by the following general structure:

[0192]

Chemical formula

[0193] <32> For group b2) of composition B, one or more compounds have the following general structure:

[0194]

Chemical formula

[0195] <33> Regarding group b2) of composition B, R4 is H, OH, halogen, C1~C 12 Selected from linear or branched alkyl or alkenyl, OX, NO2, COOH, SO3H, aryl, heteroaryl, where X is C1-C 12 It is a linear or branched alkyl group, and R5 and R6 are independently C1-C 12 Selected from linear or branched alkyl or alkenyl groups, OX, NO2, COOH, SO3H, and / or salts thereof and / or mixtures thereof, where X is C1-C 12 It is a linear or branched alkyl group. <1> ~ <28> and / or <31> ~ <32> Products listed in any of the following.

[0196] <34> One or more compounds from group b2) of composition B are

[0197] [ka] and / or selected from their salts and / or mixtures thereof, <1> ~ <28> , <31> ~ <33> Products listed in any of the following.

[0198] <35> One or more compounds from group b2) of composition B are tyron and / or its salts. <1> ~ <28> , <31> ~ <34> Products listed in any of the following.

[0199] <36> The total concentration of the compound in group b1) of composition B is 0.001% to 0.5% by weight, preferably 0.005% to 0.25% by weight, more preferably 0.01% to 0.2% by weight, and even more preferably 0.03% to 0.15% by weight, relative to the total weight of composition B. <1> ~ <28> , <31> ~ <35> Products listed in any of the following.

[0200] <37> The total concentration of tyron and / or its salt in composition B is 0.001% to 0.5% by weight, preferably 0.005% to 0.25% by weight, more preferably 0.01% to 0.2% by weight, and even more preferably 0.03% to 0.15% by weight, relative to the total weight of composition B. <1> ~ <28> , <31> ~ <36> Products listed in any of the following.

[0201] <38> One or more compounds from group b3) of composition B have the following general structure:

[0202] [ka] [In the formula, R7, R8 and R9 are independently H, OH, halogen, C1-C] 12 Selected from linear or branched alkyl or alkenyl groups, OX, COOH, phenyl, diphenyl, ureyl, and / or salts thereof and / or mixtures thereof, where X is C1-C 12 [It is a linear or branched alkyl group.] Represented by, <1> ~ <28> Products listed in any of the following.

[0203] <39> One or more compounds from group b3) of composition B are Hydantoins, dichlorodimethylhydantoins, bromochlorodimethylhydantoins, dibromodimethylhydantoins, ethotoins, phenytoins, mephenytoins, phosphenytoins, allantoins, and / or salts thereof and / or mixtures thereof. That is, <1> ~ <28> , <38> Products listed in any of the following.

[0204] <40> One or more compounds from group b3) of composition B are hydantoin or allantoin, and / or salts thereof and / or mixtures thereof. <1> ~ <28> , <38> ~ <39> Products listed in any of the following.

[0205] The product according to any one of <1> to <28>, <38> to <40>, wherein at least one compound from group b3) of composition B is hydantoin and / or its salt.

[0206] <42>The product according to any one of <1> to <28>, <38> to <41>, wherein the total concentration of the compound of b3) in composition B is 0.001% to 0.5% by weight, preferably 0.005% to 0.25% by weight, more preferably 0.01% to 0.2% by weight, still more preferably 0.03% to 0.15% by weight, based on the total weight of composition B.

[0207] <43>The product according to any one of <1> to <28>, <38> to <42>, wherein the total concentration of hydantoin and / or its salt in composition B is 0.001% to 0.5% by weight, preferably 0.005% to 0.25% by weight, more preferably 0.01% to 0.2% by weight, still more preferably 0.03% to 0.15% by weight, based on the total weight of composition B.

[0208] <44>The product according to any one of <1> to 43>, wherein the total concentration of the compound of group b) in composition B is 0.001% to 0.5% by weight, preferably 0.005% to 0.25% by weight, more preferably 0.01% to 0.2% by weight, still more preferably 0.03% to 0.15% by weight, based on the total weight of composition B.

[0209] <45>The product according to any one of <1> to <44>, wherein the weight ratio of the compound of group a) to the compound of group b) in composition B is 2 to 1,000, more preferably 20 to 600, even more preferably 37.5 to 400, even more preferably 100 to 150.

[0210] <46>The product according to any one of <1> to <45>, wherein the weight ratio of the compound of group a) to the compound of group b1) in composition B is 2 to 1,000, more preferably 20 to 600, even more preferably 37.5 to 400, even more preferably 100 to 150.

[0211] <47> The weight ratio of the compound from group a) to the compound from group b2) in composition B is 2 to 1,000, more preferably 20 to 600, even more preferably 37.5 to 400, and even more preferably 100 to 150. <1> ~ <28> and / or <31> ~ <37> Products listed in any of the following.

[0212] <48> The weight ratio of the compound from group a) to the compound from group b3) in composition B is 2 to 1,000, more preferably 20 to 600, even more preferably 37.5 to 400, and even more preferably 100 to 150. <1> ~ <28> and / or <38> ~ <43> Products listed in any of the following.

[0213] <49> Composition B is a thickening gel and / or emulsion. <1> ~ <48> Products listed in any of the following.

[0214] <50> Composition B contains one or more lipophilic compounds as compounds of group c), <1> ~ <49> Products listed in any of the following.

[0215] <51> One or more compounds from group c) are C 12 ~C 22 Aliphatic alcohols, C3-C 22 Alcohol and C 12 ~C 22 Esters with fatty acids, C8~C 22 Selected from fatty acids, vegetable oils and / or silicones and / or hydrocarbon products, and / or mixtures thereof, <50> The products listed.

[0216] <52> The total concentration of the compounds of group c) in composition B is 1% to 20% by weight, preferably 2% to 15% by weight, and more preferably 3% to 12% by weight, relative to the total weight of composition B. <50> and / or <51> Products listed in any of the following.

[0217] <53> Composition B comprises one or more surfactants as compounds of group d), preferably selected from nonionic surfactants, anionic surfactants, cationic surfactants and / or amphoteric / zwitterionic surfactants, and / or salts thereof and / or mixtures thereof, and more preferably one or more surfactants selected from anionic surfactants and / or salts thereof. <1> ~ <52> Products listed in any of the following.

[0218] <54> The total concentration of one or more compounds from group d) in composition B is 0.1% to 10% by weight relative to the total weight of composition B. <53> The products listed.

[0219] <55> Composition A and / or B contains one or more thickening polymers, <1> ~ <54> Products listed in any of the following.

[0220] <56> One or more thickening polymers are selected from nonionic thickening polymers and / or anionic thickening polymers, and / or mixtures thereof, and / or salts thereof. <55> The products listed.

[0221] <57> The total concentration of the thickening polymer, composition A and / or B is within 0.1% to 15% by weight, preferably 0.25% to 12% by weight, and more preferably 0.5% to 10% by weight, relative to the total weight of each of the compositions A and / or B. <55> ~ <56> Products listed in any of the following.

[0222] This disclosure also states, <58> <1> ~ <57> Compositions A and B, defined as either of the following, - A decolorizing powder composition C comprising one or more perate and / or peroxide salts, and one or more alkalizing agents. - A water-based brightening composition D containing one or more alkalizing agents and having a pH of 7 to 12, - Aqueous dyeing composition E having a pH of 7-12 and containing one or more dyes selected from oxidation dye precursors, oxidation dye couplers and / or direct dyes, and / or salts thereof and / or mixtures thereof. The subject is a kit of parts comprising one or more compositions selected from the following.

[0223] <59> The components are packaged separately. <58> A kit of the parts listed.

[0224] <60> The total concentration of perate and / or peroxide salts in decolorized powder composition C is 10% to 80% by weight, preferably 15% to 70% by weight, more preferably 20% to 60% by weight, and even more preferably 25% to 60% by weight, based on the total weight of decolorized powder composition C. <58> and / or <59> A kit of parts listed in any of the following.

[0225] <61> Decolorizing powder composition C further comprises one or more alkalizing agents. <58> ~ <60> A kit of parts listed in any of the following.

[0226] <62> The alkalizing agent of the decolorizing powder composition C is a metasilicate and / or disilicate, and / or their salts, preferably sodium metasilicate or sodium disilicate. <61> A kit of the parts listed.

[0227] <63> The concentration of metasilicate and / or disilicate, and / or their salts, in the decolorized powder composition C is 1% to 20% by weight, more preferably 5% to 15% by weight, based on the total weight of the decolorized powder composition C. <62> A kit of the parts listed.

[0228] <64> Aqueous lightening composition D is an emulsion containing one or more lipophilic compounds from group c). <58> ~ <59> A kit of parts listed in any of the following.

[0229] <65> The aqueous color-brightening composition D has a pH of 8 to 11, more preferably 8.5 to 10.5. <58> , <59> and <64> A kit of parts listed in any of the following.

[0230] <66> Aqueous dyeing composition E comprises an oxidation dye precursor, preferably p-phenylenediamine and / or its derivatives, p-aminophenol and / or its derivatives, and heterocyclic compounds, such as diaminopyrazole and substituted pyrimidines, and / or their derivatives and / or their salts. <58> and / or <59> A kit of parts listed in any of the following.

[0231] <67> Aqueous dyeing composition E comprises an oxidative dye coupler, preferably resorcinol and / or its derivatives, m-aminophenol and / or its derivatives, m-phenylenediamine and / or its derivatives, pyridine and / or its derivatives, and naphthol and / or its derivatives, and / or salts thereof. <58> ~ <59> , <66> A kit of parts listed in any of the following.

[0232] <68> The total concentration of the oxidation dye precursor and / or oxidation dye coupler and / or direct dye is 0.001% to 5% by weight, preferably 0.01% to 4% by weight, more preferably 0.05% to 3% by weight, and even more preferably 0.1% to 2% by weight, based on the total weight of the aqueous dyeing composition E. <58> ~ <59> , <66> ~ <67> A kit of parts listed in any of the following.

[0233] <69> Aqueous dyeing composition E contains one or more alkalizing agents, preferably ammonia, and has a general structure:

[0234] [ka] [In the formula, R 10 , R 11 and R 12 They are the same or different, R 10 , R 11 or R12 The alkalizing agent comprises one or more alkyl or alkanolamines selected from [H, C1-C4 alkyl, C3-C4 unsaturated alkyl, C3-C4 branched alkyl, C1-C4 hydroxylalkyl, C3-C4 unsaturated hydroxylalkyl, C3-C4 branched hydroxylalkyl], provided that at least one of them is different from H. <58> ~ <59> , <66> ~ <68> A kit of parts listed in any of the following.

[0235] <70> One or more alkalizing agents of aqueous staining composition E are selected from ammonia and / or monoethanolamine and / or 2-aminomethylpropanol, tris-(hydroxymethyl)-aminomethane, and / or salts thereof and / or mixtures thereof. <58> ~ <59> , <66> ~ <69> A kit of parts listed in any of the following.

[0236] <71> The total concentration of the alkalizing agent in aqueous dyeing composition E is 0.25% to 15% by weight, more preferably 0.5% to 12.5% ​​by weight, more preferably 0.75% to 10% by weight, and more preferably 1% to 7.5% by weight, based on the total weight of aqueous dyeing composition E. <58> ~ <59> , <66> ~ <70> A kit of parts listed in any of the following.

[0237] <72> The pH of aqueous dyeing composition E is 7.5 to 11, more preferably 8.0 to 10, and even more preferably 8.5 to 9.5. <58> ~ <59> , <66> ~ <71> A kit of parts listed in any of the following.

[0238] This disclosure also states, <73> A method for dyeing keratin fibers, preferably human keratin fibers, more preferably human hair, i) <1> ~ <57> The steps include: preparing compositions A and B, which are defined as either of the following; ii) A step of mixing the compositions together to obtain a ready-to-use composition having a pH of 7 to 12. iii) The step of applying the composition prepared for use to keratin fibers, iv) Allow to stand for 1 to 60 minutes, and optionally heat the keratin fibers to a temperature range of 40°C to 60°C. v) Rinse the keratin fibers and optionally shampoo the keratin fibers. This applies to methods that include [specific methods].

[0239] <74> The composition prepared in steps ii) and iii) has a pH of 7 to 12, preferably 7.5 to 11, more preferably 8.0 to 10.5. <73> Methods used.

[0240] <75> The composition prepared in step iv) is left to stand on the keratin fiber for 1 to 60 minutes, preferably 5 to 45 minutes, more preferably 10 to 35 minutes. <73> ~ <74> One of the methods described above.

[0241] <76> During the application time of the mixture prepared for use in step iv), heat may be added to the keratin fibers, preferably at a temperature of 30°C to 50°C. <73> ~ <75> One of the methods described above.

[0242] This disclosure also states, <77> To improve the color intensity and / or wash fastness of direct dyes on keratin fibers, preferably on human keratin fibers, more preferably on human hair,

[0243] [ka] [In the formula, R1, R2, and R3 are independently selected from H and CH3, and / or mixtures thereof]. 2) One or more orthodiphenols and / or derivatives thereof, and / or mixtures thereof and / or salts thereof 3) One or more imidazolidine-2,4-diones and / or derivatives thereof, and / or mixtures thereof and / or salts thereof This applies to the use of one or more compounds selected from the following.

[0244] <78> 1) One or more of the compounds are <1> , <29> ~ <30> In any of the above, one or more compounds defined as b1) <77> Use as described above.

[0245] <79> 2) One or more of the compounds are <1> , <31> ~ <37> In any of the above, one or more compounds defined as b2) <77> ~ <78> Use as described in any of the following.

[0246] <80> 3) One or more of the compounds are <1> , <38> ~ <43> In any of the above, one or more compounds defined as b3) <77> ~ <79> Use as described in any of the following.

[0247] The following examples illustrate the present invention and are not limiting thereto. Example 1

[0248] Composition B was prepared by dissolving the compounds of group b) in an aqueous solution of hydrogen peroxide while constantly stirring.

[0249] [Table 1]

[0250] The compositions were prepared and stored for 20 days under controlled conditions at 40°C. The hydrogen peroxide content was analyzed by titration, and the following concentrations were measured.

[0251] [Table 2]

[0252] As a result, compound b) was able to maintain over 96% of its hydrogen peroxide activity for 20 days, while the comparative composition without compound b) had only 58% activity after 20 days.

[0253] The composition of the first invention and the composition of comparative example 1 were both stored for 20 days, and then mixed with the following first composition A in a weight ratio of 0.4:1 (composition A:composition B) to form a ready-to-use composition having a pH of 10.0.

[0254] Composition A Ingredients Weight% Aminomethylpropanol 5.0 HC Red 18 2.0 HC Yellow 16 0.5 Fragrance (appropriate amount) 1,2-Propylene glycol until it reaches 100

[0255] The following staining results were obtained.

[0256] [Table 3]

[0257] As illustrated by the results above, the composition of Invention 1 exhibited higher dyeing strength and improved wash fastness compared to the composition of Comparative Example 1.

[0258] method hydrogen peroxide concentration The hydrogen peroxide concentration was measured by iodine titration using a Mettler Toledo DL58 titrator equipped with a redox electrode and a 0.1N sodium thiosulfate solution.

[0259] Hair dyeing Human hair strands (21 cm, 2 g per strand) were coated with the preparation composition described above and left to stand at room temperature for 30 minutes. The hair strands were then rinsed with lukewarm water, washed with a commercially available shampoo under the brand name Goldwell Deep Cleansing Shampoo, and blow-dried. The color was measured as outlined below.

[0260] The wash fastness of dyed hair strands was determined by placing them in a water bath containing 5% by weight of sodium laureth sulfate and shaking them at 40°C for 30 minutes. After this treatment, the hair strands were blow-dried and the remaining color was measured (ΔΔE).

[0261] Color measurement data is obtained using the CIE color measurement system (L * a * , b * The color difference was obtained using a colorimeter and the color difference (ΔE) was calculated using the following formula.

[0262]

number

[0263] The following examples fall within the scope of the present invention.

[0264] Example 2 Composition A weight% Hydroxyethylcellulose 3 Tetrasodium EDTA 2 Sodium carbonate 1 Ammonium persulfate 11 Potassium persulfate 36 Sodium metasilicate 10 HC Blue 18 0.2 HC Red 18 0.05 HC Yellow 16 0.01 Mineral oil 8 Diatomaceous soil until it reaches 100

[0265] Composition B weight % Cetearyl alcohol 4.0 Sodium lauryl sulfate 0.8 A suitable amount of phosphoric acid until the pH reaches 2.5 Tyrone disodium salt 0.05 Hydrogen peroxide 9.0 Water until it reaches 100.0

[0266] Example 3 Composition A weight% Aminomethylpropanol 5.0 HC Red 18 0.4 HC Yellow 16 0.1 HCBlue 18 1.0 Fragrance (appropriate amount) Diatomaceous soil until it reaches 100

[0267] Composition B weight % Cetearyl alcohol 4.0 Sodium lauryl sulfate 0.8 A suitable amount of phosphoric acid until the pH reaches 2.5 Hydantoin 0.05 Hydrogen peroxide 9.0 Water until it reaches 100.0

Claims

1. A cosmetic product for dyeing keratin fibers, - Composition A comprising one or more alkalizing agents and one or more direct dyes, - Aqueous composition B having a pH of 1 to 6 and containing the following a) and b): a) Hydrogen peroxide, and b) One or more compounds selected from b1) below: b1) Caffeine or theobromine Products that are prepared immediately before use, including those containing the specified ingredients.

2. The product according to claim 1, wherein one or more direct dyes in composition A are selected from HC Blue 18, HC Red 18, HC Yellow 16, Disperse Black 9, Acid Yellow 1, 2-amino-6-chloro-4-nitrophenol, salts thereof, or mixtures thereof.

3. The product according to claim 1, wherein the total concentration of the direct dye in composition A is 0.001% by weight to 10% by weight relative to the total weight of composition A.

4. The product according to claim 1, wherein the total concentration of the direct dye in composition A is 0.01% to 1% by weight relative to the total weight of composition A.

5. The product according to claim 1, wherein b1) of composition B is caffeine.

6. The product according to claim 1, wherein the total concentration of b) in composition B is 0.001% to 0.5% by weight relative to the total weight of composition B.

7. The product according to claim 1, wherein the total concentration of b) in composition B is 0.03% to 0.15% by weight relative to the total weight of composition B.

8. The product according to claim 1, wherein composition A and / or B further comprises one or more lipophilic compounds as c).

9. The product according to claim 1, wherein composition A and / or B further comprises one or more surfactants as d).

10. The product according to claim 1, wherein composition A and / or B further comprises, as d), one or more surfactants selected from anionic surfactants or salts thereof.

11. A method for dyeing keratin fibers, i) A step of preparing compositions A and B according to any one of claims 1 to 10, ii) A step of mixing the compositions together to obtain a ready-to-use composition having a pH of 7 to 12. iii) Step of applying the composition prepared for use to keratin fibers, iv) Allow to stand for 1 to 60 minutes, and optionally heat the keratin fibers to a temperature of 40°C to 60°C. v) Rinse the keratin fibers and optionally shampoo the keratin fibers. Methods that include...

12. To improve the color intensity and / or wash fastness of direct dyes on keratin fibers, Composition A comprising one or more alkalizing agents and one or more direct dyes, Use of a combination of aqueous composition B comprising a) hydrogen peroxide and b) one or more compounds selected from caffeine or theobromine, having a pH of 1 to 6.

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