Process for lightening or simultaneously bleaching and dyeing keratin fibres - Patents.com

Abstract

The present invention relates to a method for lightening or simultaneously bleaching and dyeing keratinous fibers, comprising applying to the keratinous fibers a composition comprising at least one chemical oxidizing agent, at least one (bi)carbonate, at least one silicate, at least one organic acid and optionally at least one coloring agent.

Description

[Technical field]

[0001] The present invention relates to a method for lightening or simultaneously bleaching and dyeing keratinous fibers, comprising applying to the keratinous fibers a composition comprising at least one chemical oxidizing agent, at least one (bi)carbonate, at least one silicate, at least one organic acid and optionally at least one coloring agent. [Background technology]

[0002] When one wishes to change the color of their hair, especially if they wish to achieve a color lighter than their original color, it is often necessary to first lighten or bleach the hair, for which purpose lightening or bleaching products are used.

[0003] Hair lightening is evaluated in terms of "tone gradations" that characterize the degree or level of lightening. The concept of "tone" is based on a gradation of natural shades, where one shade distinguishes each shade from the one before and after it. This definition and gradation of natural shades is known to hairdressing experts and has been published in a book (Non-Patent Document 1).

[0004] The shades are divided into a scale ranging from 1 (black) to 10 (very light blonde), with each scale corresponding to one shade and the higher the number, the lighter the shade.

[0005] It is a known technique to use lightening or bleaching compositions containing at least one chemical oxidizing agent to lighten or bleach hair, which is mostly carried out under alkaline pH conditions. The role of this oxidizing agent is to decompose the melanin of the hair, resulting in a more or less lightening of the fiber, depending on the nature of the oxidizing agent present and the pH conditions. Therefore, when carrying out a relatively gentle lightening, it is common to use hydrogen peroxide as an oxidizing agent. If a stronger lightening is desired, especially when the treated hair is dark, persulfate is usually used in the presence of hydrogen peroxide. However, lightening with the action of such a combination is not always satisfactory, since the hair takes on a rather unattractive orange-yellow hue that is very different from the natural shade, which complicates subsequent coloring because the shades obtained are limited to warm shades. Moreover, persulfate-based lightening compositions can deteriorate the quality of the fiber. In addition, the oxidative and / or direct dyes present to allow bleaching and dyeing of hair fibers in one step are generally not chemically compatible with persulfate-based compositions. Therefore, when it is desired to simultaneously bleach and dye keratin fibers, a two-step process is used in which a first step is performed to bleach the keratin fibers using a dye composition comprising one or more direct dyes and / or one or more oxidative dyes, followed by a second step of dyeing the keratin fibers. [Prior art documents] [Non-patent literature]

[0006] [Non-Patent Document 1] Sciences des traitements capillaires[The Science of Hair Care] by Charles Zviak,1988, published by Masson,pp.215 and 278 Summary of the Invention [Problem to be solved by the invention]

[0007] Therefore, there is a real need to develop a method that can effectively lighten keratin fibers, especially dark keratin fibers, and achieve a less yellow and more natural result. Such a method would also need to take better care of the fiber quality, especially to minimize fiber degradation. Finally, such a method would need to be compatible with existing direct and / or oxidative dyes, so that in addition to providing good color buildup and deep chromatic colors, it would also be possible to achieve a wider range of colors.

[0008] Surprisingly, the Applicant has found that by using the method according to the invention, all or some of these objectives can be achieved. [Means for solving the problem]

[0009] According to a first aspect, the subject of the present invention is a method for lightening keratinous fibres, comprising applying to the keratinous fibres: i) one or more chemical oxidants selected from hydrogen peroxide, hydrogen peroxide generating systems other than persalts, and mixtures thereof; ii) one or more compounds selected from carbonates, carbonate generating systems, bicarbonates, bicarbonate generating systems and mixtures thereof, preferably from carbonates, bicarbonates and mixtures thereof; iii) one or more silicates; iv) one or more organic acids; applying a composition comprising the silicates are present in the composition in a total content ranging from 1% to 40% by weight relative to the total weight of the composition; the composition comprises persulfates in a total content of less than 5% by weight relative to the total weight of the composition.

[0010] According to a second aspect, the subject of the invention is a method for simultaneously bleaching and dyeing keratinous fibers, comprising applying to the keratinous fibers a composition as defined above, which composition also comprises v) one or more colorants chosen from direct dyes, oxidative dyes and mixtures thereof.

[0011] According to a third aspect, a subject of the invention is a composition as defined above, in which compound ii) is ammonium bicarbonate.

[0012] According to a fourth aspect, the subject of the invention is the use of a composition comprising components i) to iv) as defined above for lightening keratinous fibres, preferably for lightening them whilst at the same time reducing their yellowness.

[0013] According to a fifth aspect, the subject of the invention is the use of a composition comprising components i) to iv) as defined above and v) one or more colorants chosen from direct dyes, oxidative dyes and mixtures thereof, for simultaneously bleaching and dyeing keratinous fibers.

[0014] According to a sixth aspect, the subject of the present invention is a device (kit) comprising several separated compartments, comprising: A first section having: - one or more chemical oxidizing agents selected from hydrogen peroxide, hydrogen peroxide generating systems other than persalts, and mixtures thereof; - optionally one or more organic acids; A first compartment containing a composition (A) comprising: A second section comprising: - one or more compounds selected from carbonates, carbonate-generating systems, bicarbonates, bicarbonate-generating systems and mixtures thereof; - one or more silicates; - optionally one or more colorants selected from direct dyes, oxidative dyes and mixtures thereof; A second compartment containing a composition (B) comprising: an optional third section comprising: - one or more colorants chosen from direct dyes, oxidative dyes and mixtures thereof; - optionally one or more organic acids; A third compartment containing a composition (C) comprising: Equipped with However, it is understood that composition (A), or, if composition (C) is present, at least one of compositions (A) and (C), comprises one or more organic acids. [Brief description of the drawings]

[0015] [Figure 1] 1 is a graph showing the variation of lightness L* as a function of the parameter b* for a composition according to the invention (Example 2) and a comparative composition based on persulfate (Example 1), the L* and b* values ​​being measurements in the CIE L*a*b* system. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] With respect to the subject matter of the present invention, unless otherwise specified, it is as follows: The term "keratinous fibres" means fibres of human or animal origin, such as head hair, body hair, eyelashes, eyebrows, wool, Angora goat hair, cashmere or fur. According to the invention, the keratinous fibres are preferably human keratinous fibres, more preferentially hair. The term "salt" means an addition salt with an inorganic or organic acid or base. Examples of salts include addition salts with bases, such as basifying agents as defined below, for example alkali metal hydroxides, alkaline earth metal hydroxides, aqueous ammonia, amines or alkanolamines. The term "alkyl group" means a linear or branched saturated hydrocarbon group containing 1 to 30 carbon atoms, preferentially 1 to 26 carbon atoms, more preferentially 1 to 22 carbon atoms, such as methyl, ethyl, n-propyl, isopropyl, butyl, n-pentyl, n-hexyl, n-decyl, n-dodecyl, tetradecyl, hexadecyl or eicosyl. · "(C x ~C y The term "alkyl group" refers to an alkyl group containing x to y carbon atoms. The term "alkenyl group" means a straight-chain or branched hydrocarbon group containing one or more conjugated or non-conjugated ethylenic unsaturations and containing from 1 to 30 carbon atoms, preferably from 1 to 26 carbon atoms and more preferentially from 1 to 22 carbon atoms, such as, for example, ethylenyl, n-propylenyl, isopropylenyl, butylenyl, n-pentylenyl, n-hexylenyl, n-decylenyl, n-dodecylenyl, tetradecylenyl, hexadecylenyl or eicosylenyl. · "(C x ~C y The term "(x)alkenyl group" means an alkenyl group containing x to y carbon atoms. The term "alkoxy group" means an alkyl group attached to an oxygen atom. · "(C x ~C y The term "alkoxy group" means an alkoxy group containing x to y carbon atoms; · "(C x ~C y The term "hydroxyalkyl group" refers to a group having at least one of its hydrogen atoms replaced by a hydroxy group (-OH) (C x ~C y ) alkyl group. The term "alkylamino group" means R'-NR a - (wherein R' represents an alkyl group, R arepresents a hydrogen atom or a (C1-C4) alkyl group optionally substituted with one or more -X(O)OH groups, where X represents a carbon atom or S=O or P-OH, preferably X represents a carbon atom. The term "alkylamide group" means R"-NR a - group (wherein R" represents an alkyl group, R a represents a hydrogen atom or a (C1-C4) alkyl group optionally substituted with one or more -X(O)OH groups, where X represents a carbon atom or S=O or P-OH, preferably X represents a carbon atom. The term "(hetero)cyclic group" means a cyclic or heterocyclic group. The term "cyclic group" means a mono- or polycyclic fused or non-fused, saturated or unsaturated, especially aromatic, carbocyclic ring containing 6 to 22 carbon atoms, said cyclic group being optionally substituted with one or more identical or different groups, especially groups selected from: (C1-C6) alkyl, (C1-C6) alkoxy, (C1-C6) hydroxyalkyl, hydroxyl (-OH) or carboxyl (-COOH). The term "heterocyclic group" means a mono- or polycyclic, fused or non-fused, saturated or unsaturated, in particular aromatic, group containing 5 to 22 ring members and containing 1 to 3 heteroatoms selected from nitrogen, oxygen and sulfur atoms, said heterocyclic group being optionally substituted with one or more identical or different groups, in particular groups selected from: (C1-C6) alkyl, (C1-C6) alkoxy, (C1-C6) hydroxyalkyl, hydroxyl (-OH) or carboxyl (-COOH). · The term "silicate" means a salt of silicate. The term "colorant" means an oxidative dye, a direct dye or a pigment. The term "oxidation dye" refers to an oxidation dye precursor selected from oxidation bases and couplers, which are colorless or low-color compounds that give colored species through a condensation reaction in the presence of an oxidizing agent. The term "direct dyes" means natural and / or synthetic dyes, including those in the form of extracts, other than oxidation dyes. These are colored compounds that end up on the surface of the fiber. They may be ionic or non-ionic, i.e. anionic, cationic, neutral or non-ionic. · The term "chemical oxidant" means an oxidant other than atmospheric oxygen.

[0017] Unless otherwise specified, when a compound is referred to in this application, this also includes its optical isomers, its geometric isomers, its tautomers, its salts or solvates such as hydrates thereof and mixtures thereof.

[0018] The terms "at least one" and "one or more" are synonymous and may be used interchangeably.

[0019] The terms "lightening" and "bleaching" are synonymous and can be used interchangeably.

[0020] Process for lightening keratin fibres According to a first aspect, the subject of the present invention is a method for lightening keratinous fibres, comprising applying to the keratinous fibres: i) one or more chemical oxidants selected from hydrogen peroxide, hydrogen peroxide generating systems other than persalts, and mixtures thereof; ii) one or more compounds selected from carbonates, carbonate generating systems, bicarbonates, bicarbonate generating systems and mixtures thereof, preferably from carbonates, bicarbonates and mixtures thereof; iii) one or more silicates; iv) one or more organic acids; applying a composition comprising the silicates are present in the composition in a total content ranging from 1% to 40% by weight relative to the total weight of the composition; the composition comprises persulfates in a total content of less than 5% by weight relative to the total weight of the composition.

[0021] Surprisingly, the Applicant has found that the method according to the invention makes it possible to effectively lighten keratin fibres with a less yellow and more natural result. When the colour of keratin fibres treated by the method according to the invention is compared with the colour of keratin fibres treated by a method using a lightening composition known from the prior art, the colour of the keratin fibres is 0.01% higher than that of the keratin fibres treated by the method according to the invention, and the colour of the keratin fibres treated by a method using a lightening composition known from the prior art is 0.01% higher than that of the keratin fibres treated by the method according to the invention. * a * b * b measured in the system according to the composition used in the method according to the present invention * The value is the lightness L * b according to the lightening compositions known from the prior art, * It is observed that the value is lower than that.

[0022] Furthermore, the method according to the invention takes greater care with regard to fiber quality, in particular fiber degradation is kept to a minimum.

[0023] According to a preferred embodiment, the method comprises: i) hydrogen peroxide; ii) one or more compounds selected from carbonates, bicarbonates, and mixtures thereof; iii) one or more silicates; iv) one or more organic acids; applying a composition comprising: however: the silicates are present in the composition in a total content ranging from 1% to 40% by weight relative to the total weight of the composition; It is understood that the composition comprises persulfates in a total content of less than 5% by weight relative to the total weight of the composition.

[0024] Chemical Oxidants The compositions include i) one or more chemical oxidizing agents selected from hydrogen peroxide, hydrogen peroxide generating systems other than persalts, and mixtures thereof.

[0025] Hydrogen peroxide generating systems other than persalts can be selected from urea peroxide, polymer complexes capable of releasing hydrogen peroxide, oxidase enzymes and mixtures thereof.

[0026] Examples of polymer complexes capable of releasing hydrogen peroxide include polyvinylpyrrolidone / H2O2, especially in powder form, and other polymer complexes described in U.S. Pat. Nos. 5,008,093, 3,376,110, and 5,183,901.

[0027] Oxidases are capable of generating hydrogen peroxide in the presence of a suitable substrate, for example glucose in the case of glucose oxidase, or uric acid in the case of uricase.

[0028] According to a particular embodiment, a hydrogen peroxide generating system other than hydrogen peroxide and / or persalts may be added to the composition according to the invention immediately before applying the composition to keratinous fibers. The intermediate composition comprising hydrogen peroxide and / or a hydrogen peroxide generating system other than persalts may be referred to as an oxidizing composition and may also contain various additional compounds or various adjuvants conventionally used in compositions for lightening keratinous fibers.

[0029] According to a preferred embodiment, the composition comprises hydrogen peroxide as the chemical oxidizing agent.

[0030] The chemical oxidizing agents are preferably present in the composition in a total content ranging from 1% to 12% by weight, more preferentially from 3% to 9% by weight and even more preferentially from 3.5% to 8.5% by weight relative to the total weight of the composition.

[0031] According to a preferred embodiment, hydrogen peroxide is present in the composition in a total content ranging from 1% to 12% by weight, preferably ranging from 3% to 9% by weight and more preferentially in the range from 3.5% to 8.5% by weight relative to the total weight of the composition.

[0032] (Bi)carbonates and / or (bi)carbonate generating systems The composition additionally comprises ii) one or more compounds selected from carbonates, carbonate generating systems, bicarbonates, bicarbonate generating systems, and mixtures thereof.

[0033] According to a preferred embodiment, the composition additionally comprises ii) one or more compounds selected from carbonates, bicarbonates and mixtures thereof.

[0034] According to a more preferred embodiment, the composition additionally comprises ii) one or more compounds selected from ammonium carbonate, ammonium bicarbonate and mixtures thereof.

[0035] The compounds ii) are present in the composition in a total content preferably in the range from 0.01% to 20% by weight, preferably in the range from 1% to 15% by weight, more preferentially in the range from 2% to 15% by weight and even more preferentially in the range from 4% to 15% by weight, relative to the total weight of the composition.

[0036] Carbonates and / or carbonate generating systems The term "carbonate generating system" means a system that produces carbonate in situ, for example, carbon dioxide in water or percarbonate in water.

[0037] Preferably, the carbonate is: - alkali metal carbonates; - alkaline earth metal carbonates; - lanthanide carbonates; - transition metal carbonates; - Bismuth carbonate; - cadmium carbonate; - Thallium carbonate; - Zinc carbonate; - Formula(N + R 1 R 2 R 3 R 4 )2,CO3 2- (In the formula, R 1 , R 2 , R3 and R 4 each independently represents a hydrogen atom or a (C1-C4) alkyl group optionally substituted with a hydroxyl group; - Guanidine carbonate; - mixtures of these; is selected from.

[0038] More preferentially, the carbonate is selected from sodium carbonate, potassium carbonate, cesium carbonate, lithium carbonate, magnesium carbonate, calcium carbonate, barium carbonate, strontium carbonate, cerium carbonate, lanthanum carbonate, yttrium carbonate, copper(II) carbonate, manganese carbonate, nickel carbonate, silver carbonate, zirconium carbonate, bismuth carbonate, cadmium carbonate, thallium carbonate, zinc carbonate, ammonium carbonate, guanidine carbonate, tetraethylammonium carbonate and mixtures thereof.

[0039] More preferentially, the carbonate is chosen from sodium carbonate, potassium carbonate, caesium carbonate, magnesium carbonate, calcium carbonate, cerium carbonate, manganese carbonate, zinc carbonate, ammonium carbonate, guanidine carbonate and mixtures thereof.

[0040] Most preferentially, the carbonate is chosen from sodium carbonate, potassium carbonate, magnesium carbonate, calcium carbonate, ammonium carbonate and mixtures thereof.

[0041] According to a particularly preferred embodiment, the carbonate contained in the composition is ammonium carbonate.

[0042] The carbonate and / or carbonate-generating system is present in the composition in a total content preferably in the range from 0.01% to 20% by weight, more preferentially in the range from 1% to 20% by weight and even more preferentially in the range from 1% to 10% by weight, relative to the total weight of the composition.

[0043] According to a preferred embodiment, the carbonates are present in the composition in a total content ranging from 0.01% to 20% by weight, preferably in the range from 1% to 20% by weight and more preferentially in the range from 1% to 10% by weight relative to the total weight of the composition.

[0044] According to a preferred embodiment, compound ii) is selected from carbonates, carbonate-generating systems and mixtures thereof, preferably carbonates.

[0045] Bicarbonates and / or bicarbonate generating systems The term "bicarbonate generating system" refers to a system that produces bicarbonate in situ, for example, by buffering carbon dioxide in water or carbonate with a mineral or organic acid.

[0046] Preferably, the bicarbonate is: - alkali metal bicarbonates; - alkaline earth metal bicarbonates; - Formula N + R 1 R 2 R 3 R 4 ,HCO3 - (In the formula, R 1 , R 2 , R 3 and R 4 each independently represents a hydrogen atom or a (C1-C4) alkyl group optionally substituted with a hydroxyl group; - Aminoguanidine bicarbonate; - mixtures of these; is selected from.

[0047] More preferentially, the bicarbonate is selected from sodium bicarbonate, potassium bicarbonate, lithium bicarbonate, cesium bicarbonate, calcium bicarbonate, magnesium bicarbonate, ammonium bicarbonate, choline bicarbonate, triethylammonium bicarbonate, aminoguanidine bicarbonate and mixtures thereof.

[0048] More preferentially, the bicarbonate is chosen from sodium bicarbonate, potassium bicarbonate, caesium bicarbonate, calcium bicarbonate, magnesium bicarbonate, ammonium bicarbonate and mixtures thereof.

[0049] Most preferentially, the bicarbonate is chosen from sodium bicarbonate, potassium bicarbonate, ammonium bicarbonate and mixtures thereof.

[0050] According to one particularly preferred embodiment, the bicarbonate contained in the composition is ammonium hydrogen carbonate.

[0051] The bicarbonate may be derived from natural waters, such as spring water from the Vichy basin or La Roche Posay, or Badoit water.

[0052] The bicarbonate and / or bicarbonate-generating system are present in the composition in a total content preferably in the range from 0.01% to 20% by weight, more preferentially in the range from 1% to 15% by weight, even more preferentially in the range from 2% to 15% by weight and most preferentially in the range from 4% to 15% by weight, relative to the total weight of the composition.

[0053] According to a preferred embodiment, the bicarbonates are present in a total content ranging from 0.01% to 20% by weight, preferably from 1% to 15% by weight, more preferentially from 2% to 15% by weight and better still from 4% to 15% by weight relative to the total weight of the composition.

[0054] According to a preferred embodiment, compound ii) is selected from bicarbonates, bicarbonate generating systems and mixtures thereof, preferably from bicarbonates.

[0055] Silicate The composition also includes iii) one or more silicates.

[0056] The silicate is preferably water soluble.

[0057] The term "water-soluble silicate" means a silicate having a solubility in water of more than 0.5% by weight, preferably more than 1% by weight, at normal room temperature (25° C.) and atmospheric pressure (760 mmHg).

[0058] Preferably, the silicate is selected from alkali metal silicates, alkaline earth metal silicates, aluminum silicate, trimethylammonium silicate and mixtures thereof.

[0059] More preferentially, the silicate is chosen from sodium silicate, potassium silicate, calcium silicate, aluminium silicate, trimethylammonium silicate and mixtures thereof.

[0060] More preferentially, the silicates are chosen from sodium silicates.

[0061] Preferably, the silicate is chosen from the compounds with the INCI names Sodium Silicate (CAS: [1344-09-8]) and / or Sodium Metasilicate (CAS: [6834-92-0]).

[0062] The silicates are present in the composition in a total content ranging from 1% to 40% by weight, preferably ranging from 2% to 35% by weight, more preferentially from 3% to 35% by weight and even more preferentially from 4% to 20% by weight relative to the total weight of the composition.

[0063] The mass ratio of the total amount of carbonates and / or carbonate generating systems to the total amount of silicates is preferably 0.00025 to 20, more preferentially 0.028 to 10, and even more preferentially 0.028 to 3.4.

[0064] According to a preferred embodiment, the mass ratio total amount of carbonates / total amount of silicates is between 0.00025 and 20, preferably between 0.028 and 10, more preferentially between 0.028 and 3.4.

[0065] The mass ratio of the total amount of carbonates and / or carbonate generating systems to the total amount of chemical oxidants is preferably 0.0008 to 20, more preferentially 0.1 to 6.6, even more preferentially 0.1 to 2.9.

[0066] According to a preferred embodiment, the mass ratio total amount of carbonates / total amount of chemical oxidizing agents is between 0.0008 and 20, preferably between 0.1 and 6.6 and more preferentially between 0.1 and 2.9.

[0067] According to a preferred embodiment, the mass ratio total amount of carbonate / total amount of hydrogen peroxide is between 0.0008 and 20, preferably between 0.1 and 6.6, more preferentially between 0.1 and 2.9.

[0068] The mass ratio of the total amount of bicarbonates and / or bicarbonate generating systems to the total amount of silicates is preferably 0.00025-20, more preferentially 0.02-7.5, and even more preferentially 0.05-5.

[0069] According to a preferred embodiment, the mass ratio of the total amount of bicarbonates / the total amount of silicates is between 0.00025 and 20, preferably between 0.02 and 7.5, and more preferentially between 0.05 and 5.

[0070] The mass ratio of the total amount of bicarbonate and / or bicarbonate generating system / the total amount of chemical oxidizing agents is preferably 0.0008 to 20, more preferentially 0.11 to 5, even more preferentially 0.2 to 4.2.

[0071] According to a preferred embodiment, the mass ratio total amount of bicarbonate / total amount of chemical oxidizing agents is between 0.0008 and 20, preferably between 0.11 and 5, and more preferentially between 0.2 and 4.2.

[0072] According to a more preferred embodiment, the mass ratio of the total amount of bicarbonate / the total amount of hydrogen peroxide is between 0.0008 and 20, preferably between 0.11 and 5, and more preferentially between 0.2 and 4.2.

[0073] The mass ratio of the total amount of carbonates and / or carbonate generating systems to the total amount of bicarbonates and / or bicarbonate generating systems is preferably 0.0005-2000, more preferentially 0.06-20, and even more preferentially 0.06-5.

[0074] According to a preferred embodiment, the mass ratio of the total amount of carbonates / the total amount of bicarbonates is between 0.0005 and 2000, preferably between 0.06 and 20, more preferentially between 0.06 and 5.

[0075] organic acid The composition additionally comprises iv) one or more organic acids.

[0076] Preferably, the organic acid iv) is selected from the compounds of formula (I) shown below, their salts, their optical isomers, their geometric isomers, their tautomers, their solvates and mixtures thereof: [ka] (In formula (I): X represents a carbon atom or S=O or P-OH, preferably a carbon atom; A is -OR 4 Group or -CR 1 (R 2 )p(R 3 ) group, provided that when X represents P-OH, A represents -OR 4 It is understood that the group represents a p=0 or 1; R 1 is a hydrogen atom or a hydroxyl group (-OH) or -NR a -R c group or -NR a -CO-R c Represents the group; R 2represents a hydrogen atom or a hydroxyl group (-OH) or a -X(O)OH group, where X is as defined above and in particular X represents a carbon atom; R 3 represents a hydrogen atom or a hydroxyl group (-OH) or an alkyl group or an alkenyl group or an alkylamino group or an alkylamide group, said alkyl group or alkenyl group or alkylamino group or alkylamide group being: - -X(O)OH groups, where X is as defined above and in particular X represents a carbon atom; optionally substituted with one or more identical or different groups selected from hydroxyl groups (-OH) or (hetero)cyclic groups; and / or - -O-, -NR a -, -S-, -CO- or a combination thereof, for example, -O-CO-, -(CO)-O-, -NR a -(CO)- or -(CO)-NR a - optionally interrupted by one or more heteroatoms or groups selected from; R 1 and R 3 together with the carbon atom to which they are attached, the following groups: (C1-C6) alkyl, especially (C1-C4) alkyl such as methyl, alkylcarbonyl -(CO)-R c , alkylcarbonyloxy-O-CO-R c , alkyloxycarbonyl-CO-OR c , -OH, (C1-C6)alkoxy, especially (C1-C4)alkoxy, such as methoxy, -X(O)OH, where X is as defined above and in particular X represents a carbon atom, or -OX(O)OH, where X is as defined above and in particular X=P-OH; R 1 and R 3 can combine with the carbon atom to which they are attached to form a carbonyl group, -CO-; R 4represents a hydrogen atom or an alkyl or alkenyl group or a (hetero)cyclic group, said alkyl or alkenyl group or (hetero)cyclic group being optionally substituted with one or more identical or different groups selected from -X(O)OH, where X is as defined above and in particular X represents a carbon atom or P-OH; a hydroxyl group (-OH) or a (hetero)cyclic group; R a represents a hydrogen atom or a (C1-C4) alkyl group optionally substituted with one or more -X(O)OH groups, where X is as defined above and in particular X represents a carbon atom; R c represents an alkyl group, an alkenyl group, an alkylamino group, or an alkylamide group, and the alkyl group, the alkenyl group, the alkylamino group, or the alkylamide group is: - optionally substituted with one or more identical or different groups selected from -X(O)OH groups, where X is as defined above and in particular X represents a carbon atom, hydroxyl groups (-OH) or (hetero)cyclic groups; and / or - one or more heteroatoms or -O-, -S-, -CO-, -O-CO-, -O-CO-, -NR a -(CO)- or -(CO)-NR a -, optionally interrupted by a group selected from

[0077] More preferentially, the organic acid is selected from the following compounds 1 to 40, their salts, their optical isomers, their geometric isomers, their tautomers, their solvates and mixtures thereof: [ka] [ka] [ka] [ka] [ka]

[0078] More preferentially, the organic acid is selected from compounds 1, 2, 3, 6, 7, 8, 9, 10, 15, 18, 22, 23, 26, 28 and 31, their salts, their optical isomers, their geometric isomers, their tautomers, their solvates and mixtures thereof.

[0079] More preferably, the organic acid is selected from compounds 1, 2, 6, 7, 8, 9, 10, 15, 18, 22, 23, 26, 28 and 31, salts thereof, optical isomers thereof, geometric isomers thereof, tautomers thereof, solvates thereof and mixtures thereof.

[0080] More preferably, the organic acid is selected from compounds 1, 2, 26, 28 and 31, salts thereof, optical isomers thereof, geometric isomers thereof, tautomers thereof, solvates thereof and mixtures thereof.

[0081] The organic acid is present in the composition in a content ranging from 0.01% to 50% by weight, more preferentially from 1% to 30% by weight, and even more preferentially from 2% to 15% by weight, relative to the total weight of the composition.

[0082] The composition comprises magnesium carbonate in a total content preferably less than 5% by weight, more preferentially less than 1% by weight, even more preferentially less than 0.1% by weight, most preferentially less than 0.01% by weight and better still less than 0.001% by weight.

[0083] According to a particularly preferred embodiment, the composition does not contain magnesium carbonate.

[0084] The composition comprises persulfates in a total content of less than 5% by weight, preferably less than 1% by weight, more preferentially less than 0.1% by weight, even more preferentially less than 0.01% by weight and most preferentially less than 0.001% by weight.

[0085] According to a particularly preferred embodiment, the composition is persulfate-free.

[0086] According to a preferred embodiment, the composition comprises colorants in a total content of less than 0.1% by weight, preferably less than 0.01% by weight and more preferentially less than 0.001% by weight relative to the total weight of the composition.

[0087] According to a more preferred embodiment, the composition is free of colorants.

[0088] Additional basifying agents The present compositions may also contain one or more additional basifying agents other than the carbonates, bicarbonates and silicates defined above.

[0089] The additional basifying agents may be inorganic or organic. They include i) aqueous ammonia, ii) alkanolamines such as monoethanolamine, diethanolamine, triethanolamine and derivatives thereof, iii) oxyethylenated and / or oxypropylenated ethylenediamines, iv) inorganic or organic hydroxides, v) amino acids, preferably basic amino acids such as arginine, lysine, ornithine, citrulline and histidine, and vi) amines of the following formula (II): [ka] (In the formula, W is a divalent (C1-C8) alkylene group, preferably a propylene group, optionally substituted, in particular by a hydroxyl group or a C1-C4 alkyl group, - R a , R b , R c and R d may be the same or different and represent a hydrogen atom, a C1-C4 alkyl group, or a C1-C4 hydroxyalkyl group; vii) and mixtures thereof.

[0090] The inorganic or organic hydroxide is preferably selected from i) alkali metal hydroxides, such as sodium hydroxide or potassium hydroxide, ii) alkaline earth metal hydroxides, iii) transition metal hydroxides, for example hydroxides of metals of groups III, IV, V and VI, iv) lanthanide hydroxides or actinide hydroxides.

[0091] If an additional basifying agent is present, it preferably represents from 0.001% to 20% by weight, more preferentially from 0.005% to 16% by weight, relative to the total weight of the composition.

[0092] According to a preferred embodiment, the composition does not comprise additional basifying agents selected from aqueous ammonia and / or alkanolamines.

[0093] Inorganic Acidifiers The composition may additionally comprise one or more inorganic acidifying agents, such as hydrochloric acid, (ortho)phosphoric acid, boric acid, nitric acid and sulfuric acid.

[0094] pH of the composition The pH of the composition is preferably 11 or less, preferably 10.5 or less, preferably 10 or less.

[0095] The pH of the composition may vary between 8 and 11, preferably between 8 and 10.5 and more preferentially between 8 and 10.

[0096] According to a particularly preferred embodiment, the pH of the composition varies between 8.3 and 10.

[0097] Sequestering Agents The composition optionally also contains one or more sequestering agents. Examples of sequestering agents that can be used in the present invention include N,N-dicarboxymethyl-L-glutamic acid and tetrasodium N,N-bis(carboxymethyl)-L-glutamate.

[0098] Process for simultaneously bleaching and dyeing keratin fibres - Patents.com According to a second aspect, the subject of the invention is a method for simultaneously bleaching and dyeing keratinous fibers, comprising applying to the keratinous fibers a composition as defined above, which composition also comprises v) one or more colorants chosen from direct dyes, oxidative dyes and mixtures thereof.

[0099] If colorants are present, they are preferably present in a total content ranging from 0.001% to 10% by weight, preferably from 0.01% to 4% by weight and more preferentially from 0.1% to 1% by weight relative to the total weight of the composition.

[0100] Oxidation dyes Oxidation dyes are generally selected from one or more oxidizing bases optionally combined with one or more coupling agents (also known as couplers).

[0101] Oxidizing Bases The composition may optionally contain one or more oxidizing bases advantageously chosen from those conventionally used for dyeing keratinous fibers.

[0102] By way of example, the oxidizing base is selected from para-phenylenediamines, bis(phenyl)alkylenediamines, para-aminophenols, ortho-aminophenols and heterocyclic bases and the corresponding addition salts.

[0103] Examples of paraphenylenediamines include para-phenylenediamine, para-toluenediamine, 2-chloro-para-phenylenediamine, 2,3-dimethyl-para-phenylenediamine, 2,6-dimethyl-para-phenylenediamine, 2,6-diethyl-para-phenylenediamine, 2,5-dimethyl-para-phenylenediamine, N,N-dimethyl-para-phenylenediamine, N,N-diethyl-para-phenylenediamine, N,N-dipropyl-para-phenylenediamine, 4-amino-N,N-diethyl-3-methylaniline, N,N-bis(β-hydroxyethyl)-para-phenylenediamine, 4-N,N-bis(β-hydroxyethyl)amino-2-methylaniline, 4-N,N-bis(β-hydroxyethyl)amino-2-chloroaniline, 2-β-hydroxyethyl-para-phenylenediamine, 2-methoxymethyl-para-phenylenediamine, 2-fluoro-para-phenylenediamine, 2- Mention may be made of isopropyl-para-phenylenediamine, N-(β-hydroxypropyl)-para-phenylenediamine, 2-hydroxymethyl-para-phenylenediamine, N,N-dimethyl-3-methyl-para-phenylenediamine, N-ethyl-N-(β-hydroxyethyl)-para-phenylenediamine, N-(β,γ-dihydroxypropyl)-para-phenylenediamine, N-(4′-aminophenyl)-para-phenylenediamine, N-phenyl-para-phenylenediamine, 2-β-hydroxyethyloxy-para-phenylenediamine, 2-β-acetylaminoethyloxy-para-phenylenediamine, N-(β-methoxyethyl)-para-phenylenediamine, 4-aminophenylpyrrolidine, 2-thienyl-para-phenylenediamine, 2-β-hydroxyethylamino-5-aminotoluene and 3-hydroxy-1-(4′-aminophenyl)pyrrolidine as well as the corresponding addition salts with acids.

[0104] Among the above-mentioned para-phenylenediamines, para-phenylenediamine, para-toluenediamine, 2-isopropyl-para-phenylenediamine, 2-β-hydroxyethyl-para-phenylenediamine, 2-β-hydroxyethyloxy-para-phenylenediamine, 2,6-dimethyl-para-phenylenediamine, 2,6-diethyl-para-phenylenediamine, 2,3-dimethyl-para-phenylenediamine, N,N-bis(β-hydroxyethyl)-para-phenylenediamine, 2-chloro-para-phenylenediamine and 2-β-acetylaminoethyloxy-para-phenylenediamine and the corresponding addition salts with acids are particularly preferred.

[0105] Examples of bis(phenyl)alkylenediamines include N,N'-bis(β-hydroxyethyl)-N,N'-bis(4'-aminophenyl)-1,3-diaminopropanol, N,N'-bis(β-hydroxyethyl)-N,N'-bis(4'-aminophenyl)ethylenediamine, N,N'-bis(4-aminophenyl)tetramethylenediamine, N,N'-bis(β-hydroxyethyl)-N,N'-bis(4-aminophenyl)tetramethylenediamine, N,N'-bis(4-methylaminophenyl)tetramethylenediamine, N,N'-bis(ethyl)-N,N'-bis(4'-amino-3'-methylphenyl)ethylenediamine, and 1,8-bis(2,5-diaminophenoxy)-3,6-dioxaoctane, as well as the corresponding addition salts.

[0106] Para-aminophenols include, for example, para-aminophenol, 4-amino-3-methylphenol, 4-amino-3-fluorophenol, 4-amino-3-chlorophenol, 4-amino-3-hydroxymethylphenol, 4-amino-2-methylphenol, 4-amino-2-hydroxymethylphenol, 4-amino-2-methoxymethylphenol, 4-amino-2-aminomethylphenol, 4-amino-2-(β-hydroxyethylaminomethyl)phenol and 4-amino-2-fluorophenol, and the corresponding addition salts with acids.

[0107] Ortho-aminophenols include, for example, 2-aminophenol, 2-amino-5-methylphenol, 2-amino-6-methylphenol and 5-acetamido-2-aminophenol and the corresponding addition salts.

[0108] Heterocyclic bases can include, for example, pyridine, pyrimidine and pyrazole derivatives.

[0109] Examples of pyridine derivatives include compounds described in GB 1026978 and GB 1153196, such as 2,5-diaminopyridine, 2-(4-methoxyphenyl)amino-3-aminopyridine and 3,4-diaminopyridine and the corresponding addition salts.

[0110] Other pyridine oxidizing bases useful in the present invention are, for example, the oxidizing bases 3-aminopyrazolo[1,5-a]pyridine or the corresponding addition salts described in French Patent Application Publication No. 2801308. Examples include pyrazolo[1,5-a]pyrid-3-ylamine, 2-acetylaminopyrazolo[1,5-a]pyrid-3-ylamine, 2-(morpholin-4-yl)pyrazolo[1,5-a]pyrid-3-ylamine, 3-aminopyrazolo[1,5-a]pyridine-2-carboxylic acid, 2-methoxypyrazolo[1,5-a]pyrid-3-ylamine, (3-aminopyrazolo[1,5-a]pyrid-7-yl)methanol, 2-( 3-aminopyrazolo[1,5-a]pyrid-5-yl)ethanol, 2-(3-aminopyrazolo[1,5-a]pyrid-7-yl)ethanol, (3-aminopyrazolo[1,5-a]pyrid-2-yl)methanol, 3,6-diaminopyrazolo[1,5-a]pyridine, 3,4-diaminopyrazolo[1,5-a]pyridine, pyrazolo[1,5-a]pyridine-3,7-diamine, 7-(morpholin-4-yl)pyrazolo[1,5- a]pyrid-3-ylamine, pyrazolo[1,5-a]pyridine-3,5-diamine, 5-(morpholin-4-yl)pyrazolo[1,5-a]pyrid-3-ylamine, 2-[(3-aminopyrazolo[1,5-a]pyrid-5-yl)(2-hydroxyethyl)amino]ethanol, 2-[(3-aminopyrazolo[1,5-a]pyrid-7-yl)(2-hydroxyethyl)amino]ethanol, 3-aminopyrazolo[1,5-a ]pyridine-5-ol, 3-aminopyrazolo[1,5-a]pyridine-4-ol, 3-aminopyrazolo[1,5-a]pyridine-6-ol, 3-aminopyrazolo[1,5-a]pyridine-7-ol, 2-β-hydroxyethoxy-3-aminopyrazolo[1,5-a]pyridine and 2-(4-dimethylpiperazinium-1-yl)-3-aminopyrazolo[1,5-a]pyridine and the corresponding addition salts.

[0111] More specifically, the oxidizing base useful in the present invention is a 3-aminopyrazolo[1,5-a]pyridine, preferably having a carbon atom at the 2-position: a) a (di)(C1-C6)(alkyl)amino group, wherein the alkyl group is optionally substituted with at least one hydroxyl, amino or imidazolium group; b) a 5-7 membered heterocycloalkyl group, optionally cationic, containing 1-3 heteroatoms, optionally substituted with one or more (C1-C6) alkyl groups, such as a di(C1-C4) alkylpiperazinium group; or c) (C1-C6)alkoxy groups optionally substituted with one or more hydroxyl groups, such as β-hydroxyalkoxy groups; and the corresponding addition salts.

[0112] Examples of pyrimidine derivatives include compounds described in patents DE 2359399; JP 02-169571 A; JP 05-63124 A; and EP 0770375; or patent application WO 96 / 15765, such as 2,4,5,6-tetraaminopyrimidine, 4-hydroxy-2,5,6-triaminopyrimidine, 2-hydroxy-4,5,6-triaminopyrimidine, 2,4-dihydroxy-5,6-diaminopyrimidine, 2,5,6-triaminopyrimidine, and addition salts thereof and tautomers thereof when tautomeric equilibrium exists.

[0113] Examples of pyrazole derivatives include compounds described in patents German Patent Nos. 3843892 and 4133957, and patent applications WO 94 / 08969, WO 94 / 08970, French Patent Publication No. 2733749A, and German Patent No. 19543988, such as 4,5-diamino-1-methylpyrazole and 4,5-diamino-1-(β-hydroxyethyl)pyrazole. , 3,4-diaminopyrazole, 4,5-diamino-1-(4'-chlorobenzyl)pyrazole, 4,5-diamino-1,3-dimethylpyrazole, 4,5-diamino-3-methyl-1-phenylpyrazole, 4,5-diamino-1-methyl-3-phenylpyrazole, 4-amino-1,3-dimethyl-5-hydrazinopyrazole, 1-benzyl-4,5-diamino-3-methylpyrazole, 4,5-diamino-3-tert-butyl-1-methylpyrazole, 4 ,5-diamino-1-tert-butyl-3-methylpyrazole, 4,5-diamino-1-(β-hydroxyethyl)-3-methylpyrazole, 4,5-diamino-1-ethyl-3-methylpyrazole, 4,5-diamino-1-ethyl-3-(4'-methoxyphenyl)pyrazole, 4,5-diamino-1-ethyl-3-hydroxymethylpyrazole, 4,5-diamino-3-hydroxymethyl-1-methylpyrazole, 4,5-diamino-3-hydroxymethyl- Examples of the pyrazoles include 4,5-diamino-3-methyl-1-isopropylpyrazole, 4-amino-5-(2'-aminoethyl)amino-1,3-dimethylpyrazole, 3,4,5-triaminopyrazole, 1-methyl-3,4,5-triaminopyrazole, 3,5-diamino-1-methyl-4-methylaminopyrazole, 3,5-diamino-4-(β-hydroxyethyl)amino-1-methylpyrazole and the corresponding addition salts. 4,5-diamino-1-(β-methoxyethyl)pyrazole can also be used.

[0114] Preferably, 4,5-diaminopyrazole will be used, more preferentially 4,5-diamino-1-(β-hydroxyethyl)pyrazole and / or the corresponding salts.

[0115] Further pyrazole derivatives include diamino-N,N-dihydropyrazolopyrazolones, in particular those described in patent application FR 2 886 136 A2, such as the following compounds and the corresponding addition salts: 2,3-diamino-6,7-dihydro-1H,5H-pyrazolo[1,2-a]pyrazol-1-one, 2-amino-3-ethylamino-6,7-dihydro-1H,5H-pyrazolo[1,2-a]pyrazole. -1-one, 2-amino-3-isopropylamino-6,7-dihydro-1H,5H-pyrazolo[1,2-a]pyrazol-1-one, 2-amino-3-(pyrrolidin-1-yl)-6,7-dihydro-1H,5H-pyrazolo[1,2-a]pyrazol-1-one, 4,5-diamino-1,2-dimethyl-1,2-dihydropyrazol-3-one, 4,5-diamino-1,2-diethyl-1,2-dihydropyrazol-3-one, 4,5-Diamino-1,2-di(2-hydroxyethyl)-1,2-dihydropyrazol-3-one, 2-Amino-3-(2-hydroxyethyl)amino-6,7-dihydro-1H,5H-pyrazolo[1,2-a]pyrazol-1-one, 2-Amino-3-dimethylamino-6,7-dihydro-1H,5H-pyrazolo[1,2-a]pyrazol-1-one, 2,3-Diamino-5,6,7,8-tetrahydro-1H,6H-pyrida Examples include dino[1,2-a]pyrazol-1-one, 4-amino-1,2-diethyl-5-(pyrrolidin-1-yl)-1,2-dihydropyrazol-3-one, 4-amino-5-(3-dimethylaminopyrrolidin-1-yl)-1,2-diethyl-1,2-dihydropyrazol-3-one, and 2,3-diamino-6-hydroxy-6,7-dihydro-1H,5H-pyrazolo[1,2-a]pyrazol-1-one.

[0116] Preferably, 2,3-diamino-6,7-dihydro-1H,5H-pyrazolo[1,2-a]pyrazol-1-one and / or the corresponding salts will be used.

[0117] As heterocyclic bases preferably 4,5-diamino-1-(β-hydroxyethyl)pyrazole and / or 2,3-diamino-6,7-dihydro-1H,5H-pyrazolo[1,2-a]pyrazol-1-one and / or the corresponding salts will be used.

[0118] Coupling Agent The composition may optionally comprise one or more coupling agents advantageously chosen from those conventionally used for the dyeing of keratinous fibres.

[0119] Among these coupling agents, mention may be made in particular of meta-phenylenediamines, meta-aminophenols, meta-diphenols, naphthalene-based coupling agents and heterocyclic coupling agents and the corresponding addition salts.

[0120] For example, 1,3-dihydroxybenzene, 1,3-dihydroxy-2-methylbenzene, 4-chloro-1,3-dihydroxybenzene, 2,4-diamino-1-(β-hydroxyethyloxy)benzene, 2-amino-4-(β-hydroxyethylamino)-1-methoxybenzene, 1,3-diaminobenzene, 1,3-bis(2,4-diaminophenoxy)propane, 3-ureidoaniline, 3-ureido-1-dimethylaminobenzene, sesamol, 1-β-hydroxyethylamino-3,4-methylenedioxybenzene, α-naphthol, 2-methyl-1-naphthol, 6-hydroxyindole, 4-hydroxyindole, 4-hydroxy-N-methylindole, 2-amino-3-hydroxypyridine, 6-hydroxybenzomorpholine, 3,5-diamino-2,6- Mention may be made of dimethoxypyridine, 1-N-(β-hydroxyethyl)amino-3,4-methylenedioxybenzene, 2,6-bis(β-hydroxyethylamino)toluene, 6-hydroxyindoline, 2,6-dihydroxy-4-methylpyridine, 1-H-3-methylpyrazol-5-one, 1-phenyl-3-methylpyrazol-5-one, 2,6-dimethylpyrazolo[1,5-b]-1,2,4-triazole, 2,6-dimethyl[3,2-c]-1,2,4-triazole, 6-methylpyrazolo[1,5-a]benzimidazole, 2-methyl-5-aminophenol, 5-N-(β-hydroxyethyl)amino-2-methylphenol, 3-aminophenol and 3-amino-2-chloro-6-methylphenol, the corresponding addition salts with acids and the corresponding mixtures.

[0121] In general, the addition salts of the oxidizing bases and of the coupling agents which can be used in connection with the present invention are chosen in particular from addition salts with acids, such as the hydrochlorides, bromates, sulfates, citrates, succinates, tartrates, lactates, tosylates, benzenesulfonates, phosphates and acetates.

[0122] Advantageously, the oxidizing bases each represent between 0.001% and 10% by weight relative to the total weight of the composition, and preferably between 0.005% and 5% by weight relative to the total weight of the composition.

[0123] When present, the coupling agent advantageously represents from 0.001% to 10% by weight, respectively, relative to the total weight of the composition, and preferably from 0.005% to 5% by weight, respectively, relative to the total weight of the composition.

[0124] direct dye The composition may also include one or more direct dyes.

[0125] The direct dyes may be neutral, cationic or anionic direct dyes, preferably neutral or cationic direct dyes.

[0126] Direct dyes are: acridines; acridones; anthranthrones; anthrapyrimidines; anthraquinones; azines; (poly)azo or azo, hydrazono or hydrazones, especially arylhydrazones; azomethines; benzanthrones; benzimidazoles; benzimidazolones; benzindoles; benzoxazoles; benzopyrans; benzothiazoles; benzoquinones; bis-isoindolines; carboxanilines. amides; coumarins; cyanines such as (di)azacarbocyanines, (di)azahemicyanines, hemicyanines, or tetraazacarbocyanines; (di)azines; bis-azines; (di)oxazines; (di)thiazines; (di)phenylamines; (di)phenylmethanes; (di)ketopyrrolopyrroles; flavonoids such as flavanthrones and flavones; fluorindins; formasans; indamines; indanthrones; indigoids, thioindigoids, and the like. and pseudoindigoids; indophenols; indoanilines; isoindolines; isoindolinones; isoviolanthrone; lactones; (poly)methines such as dimethines of the stilbene or styryl type; naphthalimides; naphthanilides; naphtholactams; naphthoquinones; nitro, especially nitro(hetero)aromatics; oxadiazoles; oxazines; perilones; perinones; perylenes; phenazines; phenoxazines; phenothiazines; phthalocyanines; polyenes / carotenoids; porphyrins; pyranthrones; pyrazoloanthrones; pyrazolones; pyrimidinoanthrones; pyronines; quinacridones; quinolines; quinophthalones; squalanes; tetrazolines; thiazines; thiopyronines; triarylmethanes; or xanthenes; and natural direct dyes. Preferably, the direct dyes are chosen from anthraquinones, (poly)azos, azomethines and stilbenes, and more preferentially from anthraquinones.

[0127] The direct dyes may be selected in particular from neutral, cationic or anionic nitrobenzene direct dyes, neutral, cationic or anionic azo direct dyes, neutral, cationic or anionic tetraazapentamethine dyes, cationic or anionic quinone dyes, in particular neutral, cationic or anionic anthraquinone dyes, neutral, cationic or anionic azine direct dyes, neutral, cationic or anionic triarylmethane direct dyes, neutral, cationic or anionic azomethine direct dyes and natural direct dyes. Preferably, the direct dyes are selected from neutral or anionic anthraquinone dyes and stilbenes.

[0128] As neutral, anionic or cationic direct dyes which can be used in the present invention, the following dyes may be mentioned: acridines; acridones; anthranthrones; anthrapyrimidines; anthraquinones; azines; (poly)azo; hydrazonos or hydrazones, in particular arylhydrazones; azomethines; benzanthrones; benzimidazoles; benzimidazolones; benzindoles; benzoxazoles; benzopyrans; benzothiazoles; benzoquinones; bisazines; bis-isoindolines; carboxanilides; coumarins; cyanines, such as azacarbocyanines, diazacarbocyanines, diazahemicyanines, hemicyanines or tetraazacarbocyanines; diazines; diketopyrrolopyrroles; dioxazines; diphenylamines; diphenylmethanes; dithiaazines; flavonoids, such as flavanthrones and flavones; fluorindins; formazans. ;indamines;indanthrones;indigoids and pseudoindigoids;indophenols;indoanilines;isoindolines;isoindolinones;isoviolanthrone;lactones;(poly)methines such as dimethines of the stilbene or styryl type;naphthalimides;naphthanilides;naphtholactams;naphthoquinones;nitro, especially nitro(hetero)aromatic compounds;oxadiazoles;oxazines, perilones;perinones;perylenes;phenazines;phenoxazines;phenothiazines;phthalocyanines;polyenes / carotenoids;porphyrins;pyranthrones;pyrazoloanthrones;pyrazolones;pyrimidinoanthrones;pyronines;quinacridones;quinolines;quinophthalones;squalanes;tetrazoles;thiazines;thioindigo;thiopyronines;triarylmethanes;or xanthenes.

[0129] neutral direct dye The direct dyes may preferably be neutral direct dyes selected from hydrazono dyes of formulae (IIIa) and (III'a), azo and styryl dyes (IVa), diazo and distyryl dyes (IV'a) and (IV''a), anthraquinone dyes (Va) and azomethine dyes (VIa) and (VI'a) and mixtures thereof, [ka] (In formulas (IIIa), (III'a), (IVa), (IV'a), (IV''a), (Va), (VIa) and (VI'a), Ar represents an aryl group substituted with at least one electron donating group, for example i) optionally substituted (C1-C8) alkyl, ii) optionally substituted (C1-C8) alkoxy, iii) (di)(C1-C8) (alkyl) amino, wherein the alkyl group is optionally substituted with a hydroxyl group, iv) aryl(C1-C8) alkylamino, v) optionally substituted N-(C1-C8) alkyl-N-aryl(C1-C8) alkylamino, for example phenyl or naphthyl, or Ar represents a julolidine group; Ar' represents an optionally substituted divalent (hetero)arylene group, such as phenylene, in particular paraphenylene or naphthalene, optionally substituted, preferably with one or more (C1-C8)alkyl, hydroxyl or (C1-C8)alkoxy groups; Ar″ represents a (hetero)aryl group, optionally and preferably substituted with at least i) an electron-withdrawing group such as nitro, nitroso, -C(X)-X′-R′, or ii) a (di)(C1-C6)(alkyl)amino group, iii) hydroxyl, iv) (C1-C6)alkoxy; in particular (hetero)aryl is selected from imidazolyl, triazolyl, indolyl or pyridyl, or from phenyl optionally substituted with at least one group selected from nitro, nitroso and amino, preferably in the para position of the phenyl group; X, X' and X'', which may be identical or different, represent an oxygen or sulfur atom or an NR'' group, preferably an oxygen atom; R 1 , R 2 , R 3 and R 4may be the same or different and represent a hydrogen or halogen atom or a group selected from hydroxyl, thiol, (C1-C4) alkyl, (C1-C4) alkoxy, (di)(C1-C4) (alkyl) amino, nitro and nitroso; R' and R'' represent a (C1-C4) alkyl group; R a and R b may be the same or different and represent a hydrogen atom or a (C1-C8) alkyl group optionally substituted, preferably with a hydroxyl group; Or, as a variation, the substituent R a is a substituent of Ar″ and / or R b is a substituent of Ar and / or R a R b together with the atom to which they are attached form a (hetero)cycloalkyl; In particular, R a and R b represents a hydrogen atom or a (C1-C4) alkyl group optionally substituted with a hydroxyl group; T and T' may be the same or different, and C(R a ) group or N, preferably N; L represents the divalent group -ALK-, -C(X)-ALK-, -ALK-C(X)- or -C(X)-ALK-C(X')-, where ALK represents a linear or branched (C1-C6) alkylene group, such as methylene, and X and X' are as defined above; R 22 , R 23 , R 24 , R 25 , R 26 and R 27 may be the same or different and represent a hydrogen or halogen atom or a group as shown below: - (C1-C6) alkyl; - hydroxyl, mercapto; - (C1-C6)alkoxy, (C1-C6)alkylthio; - aryloxy or arylthio; - aryl(C1-C6)(alkyl)amino; - (di)(C1-C6)(alkyl)amino; - (di)(hydroxy(C1-C6)alkyl)amino; represents a group selected from Z' represents a hydrogen atom or NR 28 R 29 group (in the formula, R 28 and R 29 may be the same or different and represent a hydrogen atom or a group as shown below: - (C1-C6) alkyl; - polyhydroxy(C1-C6)alkyl, such as hydroxyethyl; - aryl optionally substituted with one or more groups, in particular i) (C1-C6) alkyl; iii) R°-C(X)-X'-, R°-X'-C(X)- or R°-X'-C(X)-X''-, where R° represents a (C1-C6) alkyl group and X, X' and X'' are as defined above; iv) sulfonate; - cycloalkyl, in particular cyclohexyl; represents a group selected from Z is hydroxyl and NR' 28 R' 29 (In the formula, R' 28 and R' 29 may be the same or different, and are R 28 and R 29 represents the same atom or group as

[0130] The direct dye a) of formula (IV″a) preferably has the formula (IV′″a): [ka] (In formula (IV'''a), R 1 and R 3may be the same or different, preferably the same, and represent a hydrogen atom, a (C1-C4) alkyl group such as methyl, or a sugar such as glucosyl, preferably a hydrogen atom; R 2 and R 4 may be the same or different, preferably the same, and represent a hydrogen atom, a (C1-C4) alkyl or (C1-C4) alkoxy group, or an -O-sugar group such as -O-glucosyl, preferably a (C1-C4) alkoxy such as methoxy; X may be identical or different, preferably identical, and represent an oxygen or sulfur atom or NR, where R represents a hydrogen atom or any group, preferably an oxygen atom; ALK represents a (C1-C4) alkylene group such as methylene or ethylene, preferably methylene. It is of the following.

[0131] The direct dyes of formula (IV''a) can be derived from curcumin, demethoxycurcumin and bisdemethoxycurcumin.

[0132] Preferably, the direct dyes are selected from the direct dyes of formulae (IV''a) and (IV'''a) defined above, and mixtures thereof.

[0133] According to a particularly preferred embodiment, the direct dye is a neutral direct dye selected from the following compounds (A) to (G) and mixtures thereof: [ka] It is preferably selected from compounds (E), (F) and (G) and mixtures thereof, and more preferentially from compounds (E) and (G) and mixtures thereof.

[0134] Cationic Direct Dyes The direct dyes can be selected from those which are generally referred to as "basic dyes" because they are cationic or have an affinity for acidic substances, in particular those which contain at least one endocyclic or exocyclic cationic or cationizable group in their structure.

[0135] As cationic azo dyes that can be used in the present invention, mention may be made in particular of the cationic dyes described in Kirk-Othmer's Encyclopaedia of Chemical Technology, "Dyes, Azo", J. Wiley & Sons, revised on April 19, 2010.

[0136] Mention may also be made of the cationic azo dyes described in patent applications WO 95 / 15144, WO 95 / 01772 and EP 714954.

[0137] Mention may also be made of the cationic azo dyes described in the Colour Index International, 3rd Edition, in particular the following compounds: Basic Red 22; Basic Red 76; Basic Yellow 57; Basic Brown 16; Basic Brown 17.

[0138] Among the cationic quinone dyes suitable for use are those mentioned in the Colour Index International, 3rd Edition, among which the following dyes may be mentioned in particular: Basic Blue 22; Basic Blue 99.

[0139] Among the azine dyes suitable for use, mention may be made of those listed in the Colour Index International, 3rd Edition, such as the following dyes: Basic Blue 17, Basic Red 2.

[0140] Among the cationic triarylmethane dyes which can be used according to the invention, in addition to those listed in the Colour Index International, 3rd Edition, mention may be made of the following dyes: Basic Green 1, Basic Violet 3, Basic Violet 14, Basic Blue 7, Basic Blue 26.

[0141] Mention may also be made of the direct dyes described in documents U.S. Pat. No. 5,888,252, EP 1,133,975, WO 03 / 029359, EP 860,636, WO 95 / 01772, WO 95 / 15144 and EP 714,954.

[0142] Mention may also be made of those listed in the encyclopedia "The Chemistry of Synthetic Dyes" by K. Venkataraman, 1952, Academic Press, volumes 1-7; the chapter "Dyes and Dye Intermediates" in the "Kirk-Othmer Encyclopaedia of Chemical Technology", 1993, Wiley and Sons; and various chapters in "Ullmann's Encyclopaedia of Industrial Chemistry", 7th edition, Wiley and Sons.

[0143] Preferably, the cationic direct dyes are chosen from those obtained from the azo and hydrazono type dyes.

[0144] Cationic direct dyes are disclosed in European Patent No. 850636, French Patent No. 2788433, European Patent No. 920856, International Publication No. 9948465, French Patent No. 2757385, European Patent No. 850637, European Patent No. 918053, International Publication No. 9744004, French Patent No. 2570946, French Patent No. 2285851, German Patent No. 2538363, French Patent No. 2189006, French Patent No. 1560664, French Patent No. 1540423, French Patent No. 1567219, French Patent No. 1516943, French Patent No. 1221122, German Patent No. 4220388, German Patent No. 4137005, International Publication No. 0166646, U.S. Patent No. 5708151, International Publication No. 9501772, International Publication No. 515144, British Patent No. 1195386, U.S. Patent No. 3524842, U.S. Patent No. 5879413, European Patent No. 1062940, European Patent No. 1133976, British Patent No. 738585, German Patent No. 2527638, French Patent No. 2275462, British Patent No. 1974-27645, Acta Histochem.(1978),61(1),48-52;Tsitologiya(1968),10(3),403-5;Zh.Obshch.Khim.(1970),40(1),195-202;Ann.Chim.(Rome)(1975),65(5-6),305-14;Journal of the Chinese Chemical Society(Taipei)(1998),45(1),209-211;Rev.Roum.Chim.(1988),33(4),377-83;Text.Res.J.(1984),54(2),105-7;Chim .Ind.(Milan)(1974),56(9),600-3;Khim.Tekhnol.(1979),22(5),548-53;Ger.Monatsh.Chem.(1975),106(3),643-8;MRL Bull.Res.Dev.(1992), 6(2), 21-7; Lihua Jianyan, Huaxue Fence (1993), 29(4), 233-4; Dyes Pigm. (1992), 19(1), 69-79; Dyes Pigm. (1989), 11(3), 163-72.

[0145] Preferably, the cationic direct dye comprises a quaternary ammonium group; more preferentially, the cationic charge is within the ring. This cationic group may be, for example, - a cationic group having an exocyclic (di / tri)(C1-C8) alkyl ammonium charge; or - an intraring charge, for example: acridinium, benzimidazolium, benzobistriazolium, benzopyrazolium, benzopyridazinium, benzoquinolium, benzothiazolium, benzotriazolium, benzoxazolium, bipyridinium, bis-tetrazolium, dihydrothiazolium, imidazopyridinium, imidazolium, indolium, isoquinolium, naphthimidazolium, naphthoxazolium, naphthopyrazolium, oxadiazolium, oxazolium, The cationic group has an intracyclic charge and comprises a cationic heteroaryl group selected from oxazolopyridinium, oxonium, phenazinium, phenoxazolium, pyrazinium, pyrazolium, pyrazoyltriazolium, pyridinium, pyridinoimidazolium, pyrrolium, pyrylium, quinolium, tetrazolium, thiadiazolium, thiazolium, thiazolopyridinium, thiazoylimidazolium, thiopyrylium, triazolium, or xanthylium.

[0146] Mention may also be made of the cationic hydrazono direct dyes of the formulae (IIb) and (IIIb) and the azo direct dyes of the formulae (IVb) and (Vb): Het + -C(R a )=NN(R b )-Ar,Q - (IIb); Het + -N(R a)-N=C(R b )-Ar,Q - (IIIb); Het + -N=N-Ar,Q (IVb); Ar + -N=N-Ar'',Q - (Vb); (In formulas (IIb) to (Vb), · Het + represents a cationic heteroaryl group, such as imidazolium, indolium or pyridinium, optionally substituted, preferentially with at least one (C1-C8) alkyl group, such as methyl, and preferentially carrying a cationic charge in the ring; · Ar + represents an aryl group, such as phenyl or naphthyl, carrying an exocyclic cationic charge, preferentially ammonium, in particular tri(C1-C8)alkylammonium, such as trimethylammonium; Ar represents an optionally substituted aryl group, preferentially an aryl group, in particular a phenyl group, optionally substituted with one or more electron donating groups, such as i) optionally substituted (C1-C8) alkyl, ii) optionally substituted (C1-C8) alkoxy, iii) (di)(C1-C8) (alkyl) amino, in which the alkyl group is optionally substituted with a hydroxyl group, iv) aryl(C1-C8) alkylamino, v) optionally substituted N-(C1-C8) alkyl-N-aryl(C1-C8) alkylamino, or Ar represents a julolidine group; Ar″ represents an optionally substituted (hetero)aryl group, such as phenyl or pyrazolyl, preferentially optionally substituted by one or more (C1-C8)alkyl, hydroxyl, (di)(C1-C8)(alkyl)amino, (C1-C8)alkoxy or phenyl groups; R a and R bmay be identical or different and represent a hydrogen atom or a (C1-C8) alkyl group optionally substituted, preferentially with a hydroxyl group; Alternatively, the substituent R a Het + and / or R b is a substituent of Ar and / or R a R b together with the atom to which they are attached form a (hetero)cycloalkyl; in particular R a and R b represents a hydrogen atom or a (C1-C4) alkyl group optionally substituted with a hydroxyl group; Q - represents an anionic counterion such as a halide, alkyl sulfate, or alkyl sulfonate).

[0147] Mention may in particular be made of the azo and hydrazono direct dyes of formulae (IIb) to (Vb) having an internal cationic charge in the ring as defined above, more particularly the cationic direct dyes of formulae (IIb) to (Vb) having an internal cationic charge in the ring as described in patent applications WO 95 / 15144, WO 95 / 01772 and EP 714954.

[0148] Preferably, the following direct dyes may be mentioned: [ka] (In formulas (II-1) and (IV-1), R 1 represents a (C1-C4) alkyl group such as methyl; R 2 and R 3 may be the same or different and represent a hydrogen atom or a (C1-C4) alkyl group such as methyl; R 4represents a hydrogen atom or an electron donating group, for example an optionally substituted (C1-C8) alkyl, an optionally substituted (C1-C8) alkoxy or a (di)(C1-C8) (alkyl) amino, in which the alkyl group is optionally substituted with a hydroxyl group; in particular R 4 is a hydrogen atom; Z represents a CH group or a nitrogen atom, preferentially CH, Q - is an anionic counterion as defined above, in particular a halide such as chloride or an alkyl sulfate such as methyl sulfate or mesyl).

[0149] In particular, the dyes of formulae (II-1) and (IV-1) are selected from Basic Red 51, Basic Yellow 87 and Basic Orange 31 or derivatives thereof: [ka] where Q' is an anionic counterion as defined above, in particular a halide such as chloride or an alkyl sulfate such as methyl sulfate or mesyl.

[0150] Fluorescent dyes The direct dye may be selected from fluorescent direct dyes.

[0151] Examples of fluorescent dyes that can be used in the present invention include neutral, anionic or cationic dyes selected from the following dyes: acridine, acridone, benzanthrone, benzimidazole, benzimidazolone, benzindole, benzoxazole, benzopyran, benzothiazole, coumarin, difluoro{2-[(2H-pyrrol-2-ylidene-kN)methyl]-1H-pyrrolato-kN}boron (BODIPY®), diketopyrrolopyrrole, fluorindine, (poly)methines (especially cyanines and styryl / hemicyanines), naphthalimides, naphthanilides, naphthylamines (such as dansyl), oxadiazoles, oxazines, perylones, perinones, perylenes, polyenes / carotenoids, squalanes, stilbenes, xanthenes.

[0152] Fluorescent dyes described in EP 1 133 975, WO 03 / 029359, EP 860 636, WO 95 / 01772, WO 95 / 15144 and EP 714 954, as well as in the encyclopedia "The Chemistry of Synthetic Dyes" by K. Venkataraman, 1952, Academic Press, volumes 1-7, the chapter "Dyes and Dye Intermediates" in the "Kirk-Othmer Encyclopaedia of Chemical Technology", 1993, Wiley and Sons, various chapters in "Ullmann's Encyclopaedia of Industrial Chemistry", 7th edition, Wiley and Sons, and in the handbooks "A Guide to Fluorescent Probes and Labeling Technologies", 10th Ed., Molecular Chemistry, distributed on the Internet or in preprinted versions. Probes / Invitrogen-Oregon 2005 may also be mentioned.

[0153] According to a preferred variant, the fluorescent dye is a cationic polymethine containing at least one quaternary ammonium group, such as that of the following formula (Vb): + -[C(R c )=C(R d )] m’ -Ar,Q - (In formula (Vb), W + represents a cationic heterocyclic or heteroaryl group, in particular comprising a quaternary ammonium, which is optionally substituted, in particular with one or more (C1-C8) alkyl groups, which are optionally substituted with one or more hydroxyl groups; Ar represents an aryl group, such as phenyl or naphthyl, optionally substituted, and preferentially with i) one or more halogen atoms, such as chlorine or fluorine; ii) one or more (C1-C8)alkyl, preferably (C1-C4)alkyl, groups, such as methyl; iii) one or more hydroxyl groups; iv) one or more (C1-C8)alkoxy groups, such as methoxy; v) one or more hydroxy(C1-C8)alkyl groups, such as hydroxyethyl; vi) one or more (di)(C1-C8)alkylamino groups, in which one or more amino groups or the C1-C4 alkyl moieties thereof are preferably optionally substituted with one or more hydroxyl groups, e.g. (di)hydroxyethylamino; vii) one or more acylamino groups; viii) one or more heterocycloalkyl groups, e.g. piperazinyl, piperidyl or 5- or 6-membered heteroaryl, e.g. pyrrolidinyl, pyridyl and imidazolinyl; m' represents an integer ranging from 1 to 4, preferably m' is 1 or 2; more preferentially m'=1; R c and R d may be the same or different and represent a hydrogen atom or an optionally substituted (C1-C8) alkyl group, preferably a (C1-C4) alkyl group; or W + and adjacent R cand / or R adjacent to Ar d together with the atom to which they are attached form a (hetero)cycloalkyl; in particular R c W + and adjacent to each other, which form a (hetero)cycloalkyl, such as cyclohexyl; Q - is the anionic counterion defined above).

[0154] Anionic Dyes The direct dyes may be selected from anionic direct dyes or dyes commonly referred to as "acid" direct dyes because of their affinity for alkaline materials.

[0155] The term "anionic direct dye" is intended to mean any direct dye that contains in its structure at least one CO2R or SO3R substituent, where R represents a hydrogen atom or a cation or an ammonium ion derived from a metal or an amine. The anionic dye may be chosen from acid nitro direct dyes, acid azo dyes, acid azine dyes, acid triarylmethane dyes, acid indoamine dyes, acid anthraquinone dyes, indigoids and acid natural dyes.

[0156] Preferably, the anionic direct dye is an acidic anthraquinone dye.

[0157] The direct dye may preferably be an anionic direct dye selected from the dyes of the following formulae (III), (III'), (IV), (IV'), (V), (V'), (VI), (VI'), (VII), (VIII), (IX) and (X) and mixtures thereof:

[0158] a) diaryl anionic azo dyes of formula (III) or (III'): [ka] (In formulas (III) and (III'): R7, R8, R9, R 10, R'7, R'8, R'9, and R' 10 may be the same or different and represent a hydrogen atom or a group as shown below: - (C1-C6) alkyl; - (C1-C6)alkoxy, (C1-C6)alkylthio; - hydroxyl, mercapto; - Nitro, nitroso; - R°-C(X)-X'-, R°-X'-C(X)-, R°-X'-C(X)-X''- (wherein R° represents a hydrogen atom or a (C1-C6) alkyl group or an aryl group such as phenyl; X, X' and X'' may be the same or different and represent an oxygen or sulfur atom or NR (wherein R represents a hydrogen atom or a (C1-C6) alkyl group)); - (O)2S(O - )-,M + (In the formula, M + represents a hydrogen atom or a cationic counter ion); - (O)CO - -,M + (In the formula, M + is as defined above); - R"-S(O)2-, where R" represents a hydrogen atom or an alkyl, aryl, (di)(C1-C6)(alkyl)amino or aryl(C1-C6)(alkyl)amino group; preferentially a phenylamino or phenyl group; - R'''-S(O)2-X'-, where R''' represents an optionally substituted (C1-C6) alkyl or aryl group, and X' is as defined above; - (di)(C1-C6)(alkyl)amino; - i) nitro; ii) nitroso; iii) (O)2S(O - )-,M + (In the formula, M + is as defined above), and iv) (C1-C6) alkoxy; - optionally substituted heteroaryl; preferentially a benzothiazolyl group; - cycloalkyl, in particular cyclohexyl; - Ar-N=N- (wherein Ar represents an optionally substituted aryl group; preferentially one or more alkyl, (O)S(O - )-,M + or phenyl optionally substituted with a phenylamino group; or represents a group selected from - or two adjacent groups R7 and R8, R8 and R9, or R9 and R 10 together form a fused benzo group A'; R'7 and R'8 or R'8 and R'9 or R'9 and R' 10 together form a fused benzo group B'; A' and B' are i) nitro; ii) nitroso; iii) (O)S(O - )-,M + iv) hydroxyl; v) mercapto; vi) (di)(alkyl)amino; vii) R°-C(X)-X'-; viii) R°-X'-C(X)-; ix) R°-X'-C(X)-X''-; x) Ar-N=N-; and xi) optionally substituted aryl(C1-C6)(alkyl)amino, where M + , R°, X, X′, X″ and Ar are as defined above; W is a sigma σ bond, an oxygen or sulfur atom, or a divalent radical i) -NR-, where R is as defined above, or ii) methylene-C(R a )(R b )-(wherein, R a and R b may be the same or different and represent a hydrogen atom or an aryl group, or R a and R b together with the carbon atom to which they are attached form a spirocycloalkyl; preferentially, W represents a sulfur atom or R a and R b together to form cyclohexyl; With the proviso that formulae (III) and (III') have on one of rings A, A', B, B' or C: - At least one (O)S(O - )-,M' + group (in the formula, M' + represents a cationic counterion); or - at least one (O)CO - -,M' + group (in the formula, M' + represents a cationic counterion); Preferably, at least one sodium sulfonate group; (It is understood that this includes

[0159] Examples of dyes of formula (III) are: Acid Red 1, Acid Red 4, Acid Red 13, Acid Red 14, Acid Red 18, Acid Red 27, Acid Red 28, Acid Red 32, Acid Red 33, Acid Red 35, Acid Red 37, Acid Red 40, Acid Red 41, Acid Red 42, Acid Red 44, Pigment. Red 57, Acid Red 68, Acid Red 73, Acid Red 135, Acid Red 138, Acid Red 184, Food Red 1, Food Red 13, Acid Orange 6, Acid Orange 7, Acid Orange 10, Acid Orange 19, Acid Orange 20, Acid Orange 24, Yellow 6, Acid Yellow 9, Acid 36, Acid Yellow 199, Food Yellow 3, Acid Violet 7, Acid Violet 14, Acid Blue 113, Acid Blue 117, Acid Black 1, Acid Brown 4, Acid Brown 20, Acid Black 26, Acid Black 52, Food Black 1, Food Black 2, Food Yellow 3, or Sunset Yellow; Examples of dyes of formula (III') include: Acid Red 111, Acid Red 134, Acid Yellow 38.

[0160] b) Anionic pyrazolone azo dyes of formula (IV) or (IV'): [ka] (In formulas (IV) and (IV'): R 11 , R 12 and R 13 may be the same or different, and are a hydrogen atom, a halogen atom, a (C1-C6) alkyl group, or -(O)S(O - ),M + group (in the formula, M + is as defined above); R 14 is a hydrogen atom, a (C1-C6) alkyl group or -C(O)O - ,M + group (in the formula, M + is as defined above); R 15 represents a hydrogen atom; R 16 represents an oxo group, in which case R' 16 does not exist, or R 15 R 16 together to form a double bond; R 17 and R 18 may be the same or different and represent a hydrogen atom, or: - (O)2S(O - )-,M + (In the formula, M + is as defined above); - Ar-OS(O)2-, where Ar represents an optionally substituted aryl group, preferentially a phenyl optionally substituted with one or more alkyl groups; represents a group selected from R 19 and R 20together form either a double bond or an optionally substituted benzo group D'; R' 16 , R' 19 and R' 20 may be the same or different and represent a hydrogen atom, a (C1-C6) alkyl group, or a hydroxyl group; R 21 represents a hydrogen atom, a (C1-C6) alkyl group, or a (C1-C6) alkoxy group; R a and R b may be identical or different and are as defined above; preferentially, R a represents a hydrogen atom, and R b represents an aryl group such as phenyl; Y represents either a hydroxyl group or an oxo group; · [ka] represents a single bond when Y is an oxo group, and represents a double bond when Y is a hydroxyl group; With the proviso that formulae (IV) and (IV') have on one of rings D or E: - At least one (O)S(O - )-,M' + group (in the formula, M' + represents a cationic counterion); or - at least one (O)CO - -,M' + group (in the formula, M' + represents a cationic counterion); Preferably, at least one sodium sulfonate group; (It is understood that this includes.)

[0161] As examples of dyes of formula (IV) there may be mentioned: Acid Red 195, Acid Yellow 23, Acid Yellow 27 or Acid Yellow 76; as examples of dyes of formula (IV') there may be mentioned: Acid Yellow 17.

[0162] c) Anthraquinone dyes of formula (V) or (V'): [ka] (In the formulas (V) and (V'), R 22 , R 23 , R 24 , R 25 , R 26 and R 27 may be the same or different and represent a hydrogen atom, a halogen atom, or a group as shown below: - (C1-C6) alkyl; - hydroxyl, mercapto; - (C1-C6)alkoxy, (C1-C6)alkylthio; - optionally substituted aryloxy or arylthio, preferentially alkyl and (O)S(O - )-,M + (In the formula, M + is as defined above); - Alkyl and (O)2S(O - )-,M + (In the formula, M + is as defined above); - (di)(C1-C6)(alkyl)amino; - (di)(hydroxy(C1-C6)alkyl)amino; - (O)2S(O - )-,M + (In the formula, M + is as defined above); represents a group selected from Z' represents a hydrogen atom or NR 28 R 29 group (in the formula, R 28 and R 29 may be the same or different and represent a hydrogen atom or a group as shown below: - (C1-C6) alkyl; - polyhydroxy(C1-C6)alkyl, such as hydroxyethyl; - one or more groups, in particular i) (C1-C6) alkyl, such as methyl, n-dodecyl, n-butyl; ii) (O)2S(O - )-,M + (In the formula, M + is as defined above; iii) aryl optionally substituted with R°-C(X)-X'-, R°-X'-C(X)- or R°-X'-C(X)-X''-, where R°, X, X' and X'' are as defined above and preferentially R° represents a (C1-C6) alkyl group; - cycloalkyl, in particular cyclohexyl; represents a group selected from Z is hydroxyl and NR' 28 R' 29 (In the formula, R' 28 and R' 29 may be the same or different, and are R 28 and R 29 represents the same atom or group as wherein formulas (V) and (V') are: - At least one (O)S(O - )-,M' + group (in the formula, M' + represents a cationic counterion); or - at least one (O)CO - -,M' + group (in the formula, M' + represents a cationic counterion); Preferably, at least one sodium sulfonate group; (It is understood that this includes

[0163] Examples of dyes of formula (V) include: Acid Blue 25, Acid Blue 43, Acid Blue 62, Acid Blue 78, Acid Blue 129, Acid Blue 138, Acid Blue 140, Acid Blue 251, Acid Green 25, Acid Green 41, Acid Violet 42, Acid Violet 43, Mordant Red 3, or Ext. Violet No. 2: An example of the dye of formula (V') is Acid Black 48.

[0164] d) Nitro dyes of formula (VI) or (VI'): [ka] (In formulas (VI) and (VI'): R 30 , R 31 and R 32 may be the same or different and represent a hydrogen atom, a halogen atom, or a group as shown below: - (C1-C6) alkyl; - (C1-C6)alkoxy optionally substituted with one or more hydroxyl groups or (C1-C6)alkylthio optionally substituted with one or more hydroxyl groups; - hydroxyl, mercapto; - Nitro, nitroso; - polyhalo(C1-C6)alkyl; - R°-C(X)-X'-, R°-X'-C(X)- or R°-X'-C(X)-X''-, where R°, X, X' and X'' are as defined above; - (O)2S(O - )-,M + (In the formula, M + is as defined above); - (O)CO - -,M + (In the formula, M + is as defined above); - (di)(C1-C6)(alkyl)amino; - (di)(hydroxy(C1-C6)alkyl)amino; - heterocycloalkyl, such as piperidino, piperazino or morpholino; represents a group selected from In particular, R 30 , R 31 and R 32 represents a hydrogen atom; R c and R d may be the same or different and represent a hydrogen atom or a (C1-C6) alkyl group; W is as defined above; in particular W represents a N(H)-group; ALK represents a linear or branched divalent C1-C6 alkylene radical; in particular, ALK represents a -CH2-CH2- radical; n has a value of 1 or 2; p represents an integer ranging from 1 to 5; q represents an integer ranging from 1 to 4; u has a value of 0 or 1; When n has a value of 1, J represents a nitro or nitroso group; in particular a nitro group; When n has a value of 2, J is an oxygen or sulfur atom or a divalent radical -S(O) m - (wherein m represents an integer 1 or 2); preferentially, J represents a -SO2- group; M″ represents a hydrogen atom or a cationic counterion; · [ka] is present or absent and is one or more R 30 represents a benzo group optionally substituted with a group; wherein formulas (VI) and (VI') are: - At least one (O)S(O - )-,M' + group (in the formula, M' + represents a cationic counterion); or - at least one (O)CO - -,M' + group (in the formula, M' + represents a cationic counterion); Preferably, at least one sodium sulfonate group; (It is understood that this includes

[0165] Examples of dyes of formula (VI) include: Acid Brown 13 and Acid Orange 3; examples of dyes of formula (VI') include Acid Yellow 1, the sodium salt of 2,4-dinitro-1-naphthol-7-sulfonic acid, 2-piperidino-5-nitrobenzenesulfonic acid, 2-(4'-N,N-2"-hydroxyethyl)amino-2'-nitro)anilineethanesulfonic acid, 4-β-hydroxyethylamino-3-nitrobenzenesulfonic acid; EXT.D&C Yellow 7.

[0166] e) a triarylmethane dye of formula (VII): [ka] (In formula (VII), R 33 , R 34 , R 35 and R 36 are identical or different and represent a hydrogen atom or a group selected from (C1-C6)alkyl, optionally substituted aryl and optionally substituted aryl(C1-C6)alkyl; in particular (C1-C6)alkyl and optionally (O) m S(O - )-,M + group (in the formula, M + and m is as defined above) represents a group selected from benzyl substituted with; R 37 , R 38 , R 39 , R 40 , R 41 , R 42 , R 43 and R 44may be the same or different and represent a hydrogen atom or a group as shown below: - (C1-C6) alkyl; - (C1-C6)alkoxy, (C1-C6)alkylthio; - (di)(C1-C6)(alkyl)amino; - hydroxyl, mercapto; - Nitro, nitroso; - R°-C(X)-X'-, R°-X'-C(X)- or R°-X'-C(X)-X''- (wherein R° represents a hydrogen atom or an alkyl or aryl group; X, X' and X'' may be the same or different and represent an oxygen or sulfur atom or NR (wherein R represents a hydrogen atom or a (C1-C6) alkyl group); - (O)2S(O - )-,M + (In the formula, M + represents a hydrogen atom or a cationic counter ion); - (O)CO - -,M + (In the formula, M + is as defined above); represents a group selected from - or two adjacent groups R 41 and R 42 or R 42 and R 43 or R 43 and R 44 together, i) nitro; ii) nitroso; iii) (O)2S(O - )-,M + iv) hydroxyl; v) mercapto; vi) (di)(C1-C6)(alkyl)amino; vii) R°-C(X)-X'-; viii) R°-X'-C(X)-; ix) R°-X'-C(X)-X''-, where M + , R°, X, X′ and X″ are as defined above); In particular, R 37 ~R 40 represents a hydrogen atom, R 41 ~R 44may be the same or different and are a hydroxyl group or (O)S(O - )-, M + group (in the formula, M + is as defined above); R 43 and R 44 taken together form a benzo group, this is preferentially (O)S(O - )-group; However, at least one of rings G, H or I is: - At least one (O)S(O - )-,M' + group (in the formula, M' + represents a cationic counterion); or - at least one (O)CO - -,M' + group (in the formula, M' + represents a cationic counterion); Preferably, at least one sodium sulfonate group; (It is understood that this includes.)

[0167] Examples of dyes of formula (VII) include: Acid Blue 1; Acid Blue 3; Acid Blue 7; Acid Blue 9; Acid Violet 49; Acid Green 3; Acid Green 5, and Acid Green 50.

[0168] f) Xanthene dyes of formula (VIII): [ka] (In formula (VIII), R 45 , R 46 , R 47 and R 48 may be the same or different and represent a hydrogen atom or a halogen atom; R 49 , R 50 , R 51 and R 52may be the same or different and represent a hydrogen or halogen atom or a group as shown below: - (C1-C6) alkyl; - (C1-C6)alkoxy, (C1-C6)alkylthio; - hydroxyl, mercapto; - Nitro, nitroso; - (O)2S(O - )-,M + (In the formula, M + represents a hydrogen atom or a cationic counter ion); - (O)CO - -,M + (In the formula, M + is as defined above); represents a group selected from In particular, R 53 , R 54 , R 55 and R 48 represents a hydrogen atom or a halogen atom; G is an oxygen or sulfur atom or NR e group (in the formula, R e is as defined above); in particular, G represents an oxygen atom; L is alkoxide O - ,M + ;Thioalkoxide S - ,M + ; or NR f group (in the formula, R f represents a hydrogen atom or a (C1-C6) alkyl group, M + is as defined above; M + is in particular sodium or potassium); L' is an oxygen or sulfur atom or an ammonium group: N + R f R g (In the formula, R f and R g may be the same or different and represent a hydrogen atom, a (C1-C6) alkyl group or an optionally substituted aryl group; in particular L' represents an oxygen atom or one or more alkyl or (O) m S(O- )-,M + Groups (wherein m and M + represents a phenylamino group optionally substituted with (as defined above); Q and Q', which may be the same or different, represent an oxygen or sulfur atom; in particular Q and Q' represent an oxygen atom; M + is as defined above).

[0169] Examples of dyes of formula (VIII) include: Acid Yellow 73, Acid Red 51, Acid Red 52, Acid Red 87, Acid Red 92, Acid Red 95, and Acid Violet 9.

[0170] g) Indole dyes of formula (IX): [ka] (In formula (IX), R 53 , R 54 , R 55 , R 56 , R 57 , R 58 , R 59 and R 60 may be the same or different and represent a hydrogen atom or a group as shown below: - (C1-C6) alkyl; - (C1-C6)alkoxy, (C1-C6)alkylthio; - hydroxyl, mercapto; - Nitro, nitroso; - R°-C(X)-X'-, R°-X'-C(X)- or R°-X'-C(X)-X''- (wherein R° represents a hydrogen atom or an alkyl or aryl group; X, X' and X'' may be the same or different and represent an oxygen or sulfur atom or NR (wherein R represents a hydrogen atom or a (C1-C6) alkyl group); - (O)2S(O - )-,M + (In the formula, M+ represents a hydrogen atom or a cationic counter ion); - (O)CO - -,M + (In the formula, M + is as defined above); represents a group selected from G is an oxygen or sulfur atom or NR e group (in the formula, R e is as defined above); in particular, G represents an oxygen atom; R i and R h may be the same or different and represent a hydrogen atom or a (C1-C6) alkyl group; However, formula (IX) is: - At least one (O)S(O - )-,M' + group (in the formula, M' + represents a cationic counterion); or - at least one (O)CO - -,M' + group (in the formula, M' + represents a cationic counterion); Preferably, at least one sodium sulfonate group; (It is understood that this includes

[0171] As an example of a dye of formula (IX): Acid Blue 74 may be mentioned.

[0172] h) Quinoline dyes of formula (X): [ka] (In formula (X), R 61 represents a hydrogen atom, a halogen atom, or a (C1-C6) alkyl group; R 62 , R 63 and R 64 may be the same or different, and are a hydrogen atom or (O)S(O - )-,M + group (in the formula, M+ represents a hydrogen atom or a cationic counterion; or R 61 and R 62 or R 61 and R 64 together form one or more (O)S(O - )-,M + group (in the formula, M + represents a hydrogen atom or a cationic counterion), forming a benzo group optionally substituted with However, the formula (X) contains at least one (O)S(O - )-,M' + group (in the formula, M' + represents a cationic counterion), which is understood to preferably contain at least one sodium sulfonate group).

[0173] As examples of dyes of formula (X), mention may be made of: Acid Yellow 2, Acid Yellow 3 and Acid Yellow 5.

[0174] More specifically, the dyes of formulae (III)-(VIII) useful in the present invention are selected from the following: Acid Red 87 (VIII) (CI 45380); the sodium salt of 2,4-dinitro-1-naphthol-7-sulfonic acid (VI') (CI 10316); Acid Orange 3 (VI) (CI 10383); Acid Yellow 9 / Food Yellow 2 (III) (CI 13015); Direct Red 45 / Food Red 13 (III) (CI 14780); Acid Black 52 (III) (CI 13711); Acid Yellow 36 (III) (CI 13065); the sodium salt of 1-hydroxy-2-(2',4'-xylyl-5-sulfonatoazo)naphthalene-4-sulfonic acid / Food Red 1 (III) (CI 14700); Acid Red 14 / Food Red 3 / Mordant Blue. 79(III)(CI14720);4-hydroxy-3-[(2-methoxy-5-nitrophenyl)diaza]-6-(phenylamino)naphthalene-2-sulfonic acid, sodium salt / Acid Brown 4(III)(CI14805);Acid Orange 7 / Pigment Orange 17 / Solvent Orange 49(III)(CI15510);Food Yellow 3 / Pigment Yellow 104(III)(CI15985);Acid Red 27 / Food Red 9(III)(CI16185);Acid Orange 10 / Food Orange 4(III)(CI16230);Acid Red 44(III)(CI16250);Direct Red 33 / Food Red 12(III)(CI17200);Acid Red 184(III)(CI15685);Acid Violet 3(III)(CI19125);1-Hydroxy-2-(4'-acetamidophenylazo)-8-acetamidonapthalene-3,6-disulfonic acid, sodium salt / Acid Violet 7 / Food Red 11(III)(CI18055);Acid Red 135(III)(CI18130;Acid Yellow 27(IV)(CI19130);Acid Yellow 23 / Food Yellow 4(IV)(CI19140);4'-(sulfonato-2”,4”-dimethyl)-bis-(2,6-phenylazo)-1,3-dihydroxybenzene / Acid Orange 24(III)(CI20170);1-amino-2-(4'-nitrophenylazo)-7-phenylazo-8-hydroxynaphthalene-3,6-disulfonic acid, sodium salt / Acid Black 1(III)(CI20470);(4-((4-methylphenyl)sulfonyloxy)phenylazo)-2,2'-dimethyl-4-((2-hydroxy-5,8-disulfonato)naphthylazo)biphenyl / Acid Red 111(III')(CI23266);Food Black 2(III)(CI27755);1-(4'-sulfonatophenylazo)-4-((2''-hydroxy-3''-acetylamino-6'',8''-disulfonato)naphthylazo)-6-sulfonatonaphthalene(tetrasodium salt) / Food Black 1(III)(CI25440);Acid Blue 9(VII)(CI42090);Acid Violet 43(V)(CI60730);Acid Green 25(V)(CI61570);1-amino-4-cyclohexylamino-9,10-anthraquinone-2-sulfonic acid, sodium salt / Acid Blue 62(V)(CI62045);Acid Blue 78(V)(CI62105);4-hydroxy-3-((2-methoxyphenyl)azo)-1-naphthalenesulfonic acid, sodium salt / Acid Red 4(III)(CI14710);2-Piperidino-5-nitrobenzenesulfonic acid(VI');2(4'-N,N(2"-hydroxyethyl)amino-2'-nitro)anilineethanesulfonic acid(VI');4-β-hydroxyethylamino-3-nitrobenzenesulfonic acid(VI');Acid Violet 49(VII)(CI42640);Acid Blue 7(VII)(CI42080);1,2-Dihydroxy-3-sulfoanthraquinone sodium salt / Mordant Red 3(V)(CI58005);1-amino-9,10-dihydro-9,10-dioxo-4-(phenylamino)-2-anthracenesulfonic acid, sodium salt / Acid Blue 25(V)(CI62055);4-hydroxy-3-((2-methoxyphenyl)azo)-1-naphthalenesulfonic acid, sodium salt / Acid Red 4(III)(CI14710).

[0175] Most of these dyes are described in particular in the Colour Index published by the Society of Dyers and Colourists, PO Box 244, Perkin House, 82 Grattan Road, Bradford, Yorkshire, BD1 2JBN England.

[0176] Particularly the most preferred anionic dyes are those designated in the Color Index by the numbers CI 58005 (monosodium salt of 1,2-dihydroxy-9,10-anthraquinone-3-sulfonic acid), CI 60730 (monosodium salt of 2-[(9,10-dihydro-4-hydroxy-9,10-dioxo-1-anthracenyl)amino]-5-methylbenzenesulfonic acid), CI 15510 (monosodium salt of 4-[(2-hydroxy-1-naphthalenyl)azo]benzenesulfonic acid), CI 15985 (disodium salt of 6-hydroxy-5-[(4-sulfophenyl)azo]-2-naphthalenesulfonic acid), CI 17200 (disodium salt of 5-amino-4-hydroxy-3-(phenylazo)-2,7 ... It is a dye designated by the following formulas: CI 20470 (1-amino-2-(4'-nitrophenylazo)-7-phenylazo-8-hydroxy-3,6-naphthalenedisulfonic acid, disodium salt), CI 42090 (N-ethyl-N-[4-[[4-[ethyl[(3-sulfophenyl)methyl]amino]phenyl](2-sulfophenyl)methylene]-2,5-cyclohexadien-1-ylidene]-3-sulfobenzenemethanaminium hydroxide, disodium salt, inner salt), CI 61570 (2,2'-[(9,10-dihydro-9,10-dioxo-1,4-anthracenediyl)diimino]bis[5-methylbenzenesulfonic acid], disodium salt).

[0177] Compounds corresponding to the mesomeric or tautomeric forms of structures (III)-(X) can also be used.

[0178] natural dyes The direct dyes may also be selected from natural direct dyes.

[0179] Among the natural direct dyes which may be used according to the invention, mention may be made of lawsone, juglone, alizarin, purpurin, carminic acid, kermesic acid, purpurogallin, protocatechualdehyde, indigo, isatin, curcumin, spinulosin, apigenidin, orcein, brazilin, brazilein, hematein and hematoxylin. Extracts or decoctions containing these natural dyes may also be used, in particular poultices or extracts based on henna dye.

[0180] According to one preferred embodiment, the direct dye is selected from the triarylmethane direct dyes of formulae (IIa1) and (IIa2) and mixtures thereof: [ka] (In the formula: R1, R2, R3 and R4, which may be the same or different, represent a hydrogen atom or one of the following groups: (C1-C6)alkyl, optionally substituted, preferably with a hydroxyl group; aryl, such as phenyl, aryl(C1-C4)alkyl, such as benzyl, heteroaryl or heteroaryl(C1-C4)alkyl, or two groups R1 and R2 and / or R3 and R4, which are bonded to the same nitrogen atom, together with the nitrogen atom to which they are bonded, form an optionally substituted heterocycloalkyl group, such as morpholino, piperazino or piperidino; preferably R1, R2, R3 and R4, which may be the same or different, represent a hydrogen atom or a (C1-C4)alkyl group; R5, R6, R7, R8, R9, R 10 , R 11 , R 12 , R 13 , R 14 , R 15 and R 16are the same or different and represent a hydrogen atom, a halogen atom or one of the following groups: i) hydroxyl; ii) thiol; iii) amino; iv) (di)(C1-C4)(alkyl)amino; v) (di)arylamino, such as (di)phenylamino; vi) nitro; vii) acylamino (-NR-C(O)R'), where the R group is a hydrogen atom or a C1-C4 alkyl group optionally carrying at least one hydroxyl group, and the R' group is a C1-C2 alkyl group; viii) carbamoyl ((R)2N-C(O)-), where the R groups are the same or different and represent a hydrogen atom or a C1-C4 alkyl group optionally carrying at least one hydroxyl group; ix) carboxylic acid or ester (-OC(O)R') or (-C(O)OR') ( where the R' group is a hydrogen atom or a C1-C4 alkyl group optionally having at least one hydroxyl group, the R' group being a C1-C2 alkyl group; x) alkyl optionally substituted, in particular with a hydroxyl group; xi) alkylsulfonylamino (R'SO2-NR-), where the R group is a hydrogen atom or a C1-C4 alkyl group optionally having at least one hydroxyl group, the R' group is a C1-C4 alkyl group, a phenyl group; xii) aminosulfonyl ((R)2N-SO2-), where the R groups, which may be the same or different, are a hydrogen atom or a C1-C4 alkyl group optionally having at least one hydroxyl group; xiii) (C1-C4)alkoxy; and xiv) (C1-C4)alkylthio; or two groups R5 and R6 and / or R7 and R8 and / or R9 and R 10 and / or R 11 and R 12 and / or R 13 and R 14 and / or R 15 and R 16together with the carbon atom to which they are attached form a 6-membered fused aryl or heteroaryl ring, preferably a benzo ring, which may be further optionally substituted, preferably an unsubstituted benzo ring; Q - represents an anionic counterion, preferably selected from halides, such as chloride or bromide, and phosphate, to achieve electroneutrality.

[0181] According to this preferred embodiment, the direct dye is preferably HC Blue 15.

[0182] According to one variant of the invention, the direct dye is chosen from cationic direct dyes, preferably from direct dyes carrying a cationic charge in the ring, more particularly from formula (IV-1) as defined above, for example Basic Red 51.

[0183] The direct dyes are preferably selected from cationic direct dyes, more preferentially from triarylmethane direct dyes of formula (IIa1) and (IIa2) as defined above, direct dyes of formula (IV-1) as defined above and mixtures thereof, and even more preferentially from HC Blue 15, Basic Red 51 and mixtures thereof.

[0184] The direct dyes may be present in the composition in a total content ranging from 0.001% to 5% by weight, preferably from 0.01% to 3% by weight, more preferentially from 0.1% to 1% by weight and even more preferentially from 0.1% to 0.8% by weight relative to the total weight of the composition.

[0185] Other characteristics of the composition The composition comprises water in a content preferably ranging from 5% to 99% by weight, more preferentially from 5% to 80% by weight, relative to the total weight of the composition.

[0186] The composition may further comprise at least one organic solvent.

[0187] The term "organic solvent" refers to an organic substance that can dissolve other substances without causing chemical alteration therein.

[0188] Examples of organic solvents include lower C2-C4 alkanols, such as ethanol and isopropanol; polyols and polyol ethers, such as 2-butoxyethanol, propylene glycol, propylene glycol monomethyl ether, diethylene glycol monoethyl ether or diethylene glycol monomethyl ether, as well as aromatic alcohols, such as benzyl alcohol or phenoxyethanol, and mixtures thereof.

[0189] The organic solvent is preferably present in a proportion ranging from 0.1% to 40% by weight, more preferentially from 1% to 30% by weight, and even more preferentially from 1% to 25% by weight, relative to the total weight of the composition.

[0190] The composition may be provided in liquid form, in serum form, in thickened form, in particular in the form of a gel, cream, wax or paste, or in foam form.

[0191] The compositions may also contain one or more additional compounds selected from nonionic, anionic, cationic or amphoteric surfactants; cationic, anionic, nonionic or zwitterionic, associative or non-associative thickening polymers of natural or synthetic origin; silicones in the form of oils, gums or resins; or non-silicone oils of vegetable, mineral or synthetic origin; UV filters; fillers such as pearlescent agents and metal oxides such as titanium dioxide, clays; fragrances; deflocculants; vitamins; and preservatives.

[0192] Additional features of the process for lightening or simultaneously bleaching and dyeing keratin fibres The composition is applied in particular to wet or dry keratinous fibres.

[0193] Preferably, the keratinous fibers are dark colored keratinous fibers.

[0194] The term "dark keratinous fibers" means keratinous fibers having a shade of less than or equal to 6 (dark blonde), preferably less than or equal to 4 (chestnut brown).

[0195] The composition may advantageously be applied to the keratinous fibres in an amount ranging from 0.1 g to 20 g of composition per gram of keratinous fibre.

[0196] The composition is left in place on the fibers for a period generally ranging from 1 minute to 1 hour, preferably from 5 minutes to 60 minutes.

[0197] By way of example, the composition may be left in place on the fabric for 50 minutes.

[0198] The composition can be left in place on the fabric in an occlusive system, non-limiting examples of which can include envelope-type occlusive systems made from aluminum foil or plastic film, or hair caps with or without holes.

[0199] The temperature during the lightening method is between ambient temperature (15°C to 25°C) and 80°C, preferably between ambient temperature and 60°C.

[0200] As an example, the temperature during the lightening process is 33°C.

[0201] Once the treatment is complete, the keratinous fibers are optionally rinsed with water, optionally washed with shampoo, then rinsed with water, and then dried or left to dry naturally.

[0202] The drying step can be performed using absorbent paper, a hair dryer or a styling hood.

[0203] The composition used in the method according to the invention is preferably prepared by mixing at least two compositions, the mixing of said at least two compositions being preferably carried out in situ before applying the compositions to the keratinous fibres.

[0204] According to a preferred embodiment, the composition used in the method according to the invention comprises: A composition (A) comprising: - one or more chemical oxidizing agents selected from hydrogen peroxide, hydrogen peroxide generating systems other than persalts and mixtures thereof, as defined above, preferably hydrogen peroxide; - optionally one or more organic acids as defined above; A composition (A) comprising: A composition (B) comprising: - one or more compounds selected from carbonates, carbonate-generating systems, bicarbonates, bicarbonate-generating systems and mixtures thereof as defined above, preferably selected from carbonates, bicarbonates and mixtures thereof as defined above; - one or more silicates as defined above; - optionally one or more colorants selected from direct dyes, oxidative dyes and mixtures thereof; A composition (B) comprising: Optional composition (C) comprising: - one or more colorants chosen from direct dyes, oxidative dyes and mixtures thereof; optionally one or more organic acids as defined above; A composition (C) comprising: and However, it is understood that composition (A), or, if composition (C) is present, at least one of compositions (A) and (C), comprises one or more organic acids as defined above.

[0205] When the process according to the invention is a process for lightening keratin fibres, the composition used in this process is preferably: A composition (A) comprising: - one or more chemical oxidizing agents selected from hydrogen peroxide, hydrogen peroxide generating systems other than persalts and mixtures thereof, as defined above, preferably hydrogen peroxide; - one or more organic acids as defined above; A composition (A) comprising: A composition (B) comprising: - one or more compounds selected from carbonates, carbonate-generating systems, bicarbonates, bicarbonate-generating systems and mixtures thereof as defined above, preferably selected from carbonates, bicarbonates and mixtures thereof as defined above; - one or more silicates as defined above; A composition (B) comprising: It is obtained by mixing

[0206] If the process according to the invention is a process for simultaneously bleaching and dyeing keratin fibres, the composition used in this process comprises: A composition (A) comprising: - one or more chemical oxidizing agents selected from hydrogen peroxide, hydrogen peroxide generating systems other than persalts and mixtures thereof, as defined above, preferably hydrogen peroxide; - optionally one or more organic acids as defined above; A composition (A) comprising: A composition (B) comprising: - one or more compounds selected from carbonates, carbonate-generating systems, bicarbonates, bicarbonate-generating systems and mixtures thereof as defined above, preferably selected from carbonates, bicarbonates and mixtures thereof as defined above; - one or more silicates as defined above; - one or more colorants chosen from direct dyes, oxidative dyes and mixtures thereof; A composition (B) comprising: can be obtained by mixing

[0207] If the process according to the invention is a process for simultaneously bleaching and dyeing keratin fibres, the composition used in this process comprises: A composition (A) comprising: - one or more chemical oxidizing agents selected from hydrogen peroxide, hydrogen peroxide generating systems other than persalts and mixtures thereof, as defined above, preferably hydrogen peroxide; - optionally one or more organic acids as defined above; A composition (A) comprising: A composition (B) comprising: - one or more compounds selected from carbonates, carbonate-generating systems, bicarbonates, bicarbonate-generating systems and mixtures thereof as defined above, preferably selected from carbonates, bicarbonates and mixtures thereof as defined above; - one or more silicates as defined above; - optionally one or more colorants selected from direct dyes, oxidative dyes and mixtures thereof; A composition (B) comprising: A composition (C) comprising: - one or more colorants chosen from direct dyes, oxidative dyes and mixtures thereof; - optionally one or more organic acids as defined above; A composition (C) comprising: can be obtained by mixing However, it is understood that at least one of compositions (A) and (C) contains one or more organic acids as defined above.

[0208] Preferably, when the composition according to the invention is obtained by mixing the compositions (A), (B) and (C) defined above, composition (B) does not comprise a colorant chosen from direct dyes, oxidative dyes and mixtures thereof.

[0209] Preferably, at least one of the compositions (A) or (B), or at least one of the three compositions (A) or (B) or (C), is aqueous. More preferentially, composition (A) is aqueous.

[0210] According to a particular embodiment, composition (B) is anhydrous.

[0211] According to a particular embodiment, composition (A) is aqueous, composition (B) is anhydrous and composition (C), if present, is aqueous.

[0212] The term "aqueous composition" means a composition which comprises at least 2% by weight of water, preferably at least 5% by weight of water, more preferentially at least 10% by weight of water and even more advantageously more than 20% by weight of water.

[0213] The term "anhydrous composition" means a composition containing less than 2% by weight of water, preferably less than 0.5% by weight of water, and more preferentially free of water. Where appropriate, such small amounts of water may be introduced in particular by raw materials of the composition which may contain residual amounts of water.

[0214] The composition used in the method according to the invention has the same level of lightness L lightened using a composition containing one or more persulfates. * Measured on keratin fibers with * value, b * It is possible to achieve a lightening of keratin fibres, characterized by a low b value, preferably 10% lower and more preferentially 15% lower, * and L * The value is CIE L * a * b * It is a measurement in the system.

[0215] Preferably, b * and L * The value is measured according to the color evaluation method described in the examples.

[0216] composition According to a third aspect, a subject of the invention is a composition as defined above, in which compound ii) is ammonium bicarbonate.

[0217] use According to a fourth aspect, the subject of the invention is the use of a composition comprising components i) to iv) as defined above for lightening keratinous fibres, preferably for lightening keratinous fibres whilst at the same time reducing their yellowness.

[0218] According to a fifth aspect, the subject of the invention is the use of a composition comprising components i) to iv) as defined above and v) one or more colorants chosen from direct dyes, oxidative dyes and mixtures thereof, for simultaneously bleaching and dyeing keratinous fibers.

[0219] Multi-compartment device (kit) According to a sixth aspect, the subject of the present invention is a device (kit) comprising several separated compartments, comprising: A first section having: - one or more chemical oxidizing agents selected from hydrogen peroxide, hydrogen peroxide generating systems other than persalts and mixtures thereof, as defined above, preferably hydrogen peroxide; - optionally one or more organic acids as defined above; A first compartment containing a composition (A) comprising: A second section comprising: - one or more compounds selected from carbonates, carbonate-generating systems, bicarbonates, bicarbonate-generating systems and mixtures thereof as defined above, preferably selected from carbonates, bicarbonates and mixtures thereof as defined above; - one or more silicates as defined above; - optionally one or more colorants selected from direct dyes, oxidative dyes and mixtures thereof; A second compartment containing a composition (B) comprising: an optional third section comprising: - one or more colorants chosen from direct dyes, oxidative dyes and mixtures thereof; - optionally one or more organic acids as defined above; A third compartment containing a composition (C) comprising: Equipped with However, it is understood that composition (A), or, if composition (C) is present, at least one of compositions (A) and (C), comprises one or more organic acids as defined above. EXAMPLES

[0220] The following examples will enable a clearer understanding of the present invention, but are not intended to limit its nature, and in the following examples, unless otherwise specified, all amounts are expressed as percentages by weight based on the total weight of the composition.

[0221] How to evaluate color In these examples, the color of the hair strands was measured using a Minolta CM3610A Spectrophotometer (illuminant D65) as a colorimeter, using the CIE L * a * b * was evaluated in the system.

[0222] This L * a * b * In the system, L * represents the lightness of the color, and a * represents the hue along the green / red axis, and b * represents the hue along the blue / yellow axis. * The higher the value, the brighter the color. * The higher the value of b, the stronger the redness. * The higher the value, the stronger the blueness.

[0223] Example 1 (Comparative) The following compositions C1-C12 were prepared and then applied according to the application procedures described below.

[0224] [Table 1]

[0225] [Table 2]

[0226] Application procedure 10 g of each of compositions C1 to C12 is applied to 12 1 g locks of Caucasian HT4 hair on a hot plate maintained at a temperature of 33° C. The whole is covered with cellophane film for 50 minutes.

[0227] The tresses are then rinsed, washed with a standard shampoo, rinsed again and then dried.

[0228] Color measurement The color measurement results are summarized in the following table.

[0229] [Table 3]

[0230] The results show that the comparative composition containing persulfate has a relatively high L * Although a good level of lightening, characterized by a high b value, can be achieved, the resulting color shades tend to be * 4 shows that the color has a significant yellow component characterized by a value of 0.01.

[0231] Example 2 The following compositions C13-C27 were prepared and then applied according to the application procedures described below.

[0232] [Table 4]

[0233] [Table 5]

[0234] [Table 6]

[0235] Application procedure 10 g of each of compositions C13 to C27 is applied to 15 1 g tresses of Caucasian HT4 hair on a hot plate maintained at a temperature of 33° C. The whole is covered with cellophane film for 50 minutes.

[0236] The tresses are then rinsed, washed with a standard shampoo, rinsed again and then dried.

[0237] Color measurement The color measurement results are summarized in the following table.

[0238] [Table 7]

[0239] This result shows that the method according to the present invention has a relatively high L * It has been shown that it is possible to achieve a good level of lightening, characterized by a lightness value L . Furthermore, as shown in FIG. 1, the shade obtained by the composition used in the method according to the present invention is characterized by a lightness value L . * At the same level, the b is higher than the persulfate-based comparative composition of Example 1. * It is characterized by a low value.

[0240] Example 3 The following compositions D1 and D2 were prepared and then applied according to the application procedure described below.

[0241] [Table 8]

[0242] Application procedure 10 g of each of compositions D1 to D2 are applied to two 1 g locks of Caucasian dark HT4 hair on a hot plate maintained at a temperature of 33° C. The whole is left in the open air for 50 minutes.

[0243] The tresses are then rinsed, washed with a standard shampoo, rinsed again and then dried.

[0244] result

[0245] [Table 9]

[0246] The process according to the invention makes it possible to simultaneously bleach and dye dark hair in one step, making it possible to obtain intense colors.

[0247] Example 4 The following compositions E1 and E2 were prepared and then applied according to the application procedures described below.

[0248] [Table 10]

[0249] Application procedure 10 g of each of compositions E1 to E2 are applied to two 1 g locks of Caucasian dark HT4 hair on a hot plate maintained at a temperature of 33° C. The whole is left in the open air for 50 minutes.

[0250] The tresses are then rinsed, washed with a standard shampoo, rinsed again and then dried.

[0251] result:

[0252] [Table 11]

[0253] The process according to the invention makes it possible to simultaneously bleach and dye dark hair in one step, making it possible to obtain intense colors.

Claims

1. 1. A method for lightening keratin fibers comprising: i) one or more chemical oxidants selected from hydrogen peroxide, hydrogen peroxide generating systems other than persalts, and mixtures thereof; ii) one or more compounds selected from carbonates, carbonate generating systems, bicarbonates, bicarbonate generating systems and mixtures thereof, preferably from carbonates, bicarbonates and mixtures thereof; iii) one or more silicates; and iv) one or more organic acids; applying a composition comprising: said silicates are present in said composition in a total content ranging from 1% to 40% by weight relative to the total weight of said composition; - the composition comprises persulfates in a total content of less than 5% by weight relative to the total weight of the composition.

2. A method for simultaneously bleaching and dyeing keratinous fibers, comprising applying the composition of claim 1 to the keratinous fibers, said composition also comprising v) one or more colorants selected from direct dyes, oxidative dyes and mixtures thereof.

3. The method of claim 1 or 2, wherein the chemical oxidizing agent is hydrogen peroxide.

4. 4. The method according to any one of claims 1 to 3, wherein said chemical oxidizing agent is present in the composition in a total content ranging from 1% to 12% by weight, preferably ranging from 3% to 9% by weight and more preferentially ranging from 3.5% to 8.5% by weight relative to the total weight of the composition.

5. 5. The method according to any one of claims 1 to 4, wherein said compounds ii) are present in the composition in a total content ranging from 0.01% to 20% by weight, preferably ranging from 1% to 15% by weight, more preferentially in the range from 2% to 15% by weight and even more preferentially in the range from 4% to 15% by weight relative to the total weight of the composition.

6. The process according to any one of claims 1 to 5, wherein said compound ii) is selected from carbonates, carbonate generating systems and mixtures thereof, preferably carbonates.

7. 7. The method according to any one of claims 1 to 6, wherein the carbonate and / or the carbonate-generating system are present in the composition in a total content ranging from 0.01% to 20% by weight, preferably in the range from 1% to 20% by weight and more preferentially in the range from 1% to 10% by weight relative to the total weight of the composition.

8. The carbonate is: - alkali metal carbonates; - alkaline earth metal carbonates; - lanthanide carbonates; transition metal carbonates; - bismuth carbonate; - cadmium carbonate; - thallium carbonate; - zinc carbonate; - Formula (N ＋ R １ R ２ R ３ R ４ ) ２ , CO ３ ２－ (In the formula, R １ , R ２ , R ３ and R ４ each independently represents a hydrogen atom or optionally substituted with a hydroxyl group (C １ ~C ４ ) an alkyl group; - guanidine carbonate; - Mixtures of these is selected from 8. The method according to any one of claims 1 to 7, wherein the carbonate is preferably selected from sodium carbonate, potassium carbonate, caesium carbonate, lithium carbonate, magnesium carbonate, calcium carbonate, barium carbonate, strontium carbonate, cerium carbonate, lanthanum carbonate, yttrium carbonate, copper(II) carbonate, manganese carbonate, nickel carbonate, silver carbonate, zirconium carbonate, bismuth carbonate, cadmium carbonate, thallium carbonate, zinc carbonate, ammonium carbonate, guanidine carbonate, tetraethylammonium carbonate and mixtures thereof, more preferentially from sodium carbonate, potassium carbonate, caesium carbonate, magnesium carbonate, calcium carbonate, cerium carbonate, manganese carbonate, zinc carbonate, ammonium carbonate, guanidine carbonate and mixtures thereof, even more preferentially from sodium carbonate, potassium carbonate, magnesium carbonate, calcium carbonate, ammonium carbonate and mixtures thereof; and most preferentially, the carbonate is ammonium carbonate.

9. The process according to any one of claims 1 to 8, wherein the compound ii) is selected from bicarbonates, bicarbonate generating systems and mixtures thereof, preferably from bicarbonates.

10. 10. The method according to any one of claims 1 to 9, wherein the bicarbonate and / or the bicarbonate-generating system are present in the composition in a total content ranging from 0.01% to 20% by weight, preferably in the range from 1% to 15% by weight, more preferentially in the range from 2% to 15% by weight and even more preferentially in the range from 4% to 15% by weight, relative to the total weight of the composition.

11. The bicarbonate is - alkali metal hydrogen carbonates; - alkaline earth metal hydrogen carbonates; - Formula N ＋ R １ R ２ R ３ R ４ , HCO ３ － (In the formula, R １ , R ２ , R ３ and R ４ each independently represents a hydrogen atom or optionally substituted with a hydroxyl group (C １ ~C ４ ) an alkyl group; - aminoguanidine bicarbonate; - Mixtures of these is selected from 11. The method according to any one of claims 1 to 10, wherein the bicarbonate is preferably selected from sodium bicarbonate, potassium bicarbonate, lithium bicarbonate, caesium bicarbonate, calcium bicarbonate, magnesium bicarbonate, ammonium bicarbonate, choline bicarbonate, triethylammonium bicarbonate, aminoguanidine bicarbonate and mixtures thereof, more preferentially from sodium bicarbonate, potassium bicarbonate, caesium bicarbonate, calcium bicarbonate, magnesium bicarbonate, ammonium bicarbonate and mixtures thereof, more preferentially from sodium bicarbonate, potassium bicarbonate, caesium bicarbonate, calcium bicarbonate, magnesium bicarbonate, ammonium bicarbonate and mixtures thereof, even more preferentially from sodium bicarbonate, potassium bicarbonate, ammonium bicarbonate and mixtures thereof; and most preferentially, the bicarbonate is ammonium bicarbonate.

12. 12. The method according to any one of claims 1 to 11, wherein the silicate is chosen from alkali metal silicates, alkaline earth metal silicates, aluminium silicate, trimethylammonium silicate and mixtures thereof, preferably from sodium silicate, potassium silicate, calcium silicate, aluminium silicate, trimethylammonium silicate and mixtures thereof, more preferentially from sodium silicate and even more preferentially from compounds with the INCI name Sodium Silicate and / or Sodium Metasilicate.

13. 13. The method according to any one of the preceding claims, wherein said silicates are present in the composition in a total content ranging from 2% to 35% by weight, preferably ranging from 3% to 35% by weight and more preferentially ranging from 4% to 20% by weight relative to the total weight of the composition.

14. The process according to any one of claims 1 to 13, wherein the weight ratio of the total amount of bicarbonate and / or bicarbonate-generating system to the total amount of silicates is between 0.00025 and 20, preferably between 0.02 and 7.5 and more preferentially between 0.05 and 5.

15. 15. The process according to any one of claims 1 to 14, wherein the mass ratio of the total amount of bicarbonate and / or bicarbonate generating system / the total amount of chemical oxidizing agent is between 0.0008 and 20, preferably between 0.11 and 5, more preferentially between 0.2 and 4.

2.

16. 16. The process according to any one of claims 1 to 15, wherein the mass ratio of the total amount of carbonates and / or carbonate-generating systems to the total amount of bicarbonates and / or bicarbonate-generating systems is between 0.0005 and 2000, preferably between 0.06 and 20 and more preferentially between 0.06 and 5.

17. The organic acid iv) is represented by the formula (I) shown below: 【Chemistry 1】 (In formula (I): X represents a carbon atom or S=O or P-OH, preferably a carbon atom; ・A is -OR ４ Group or -CR １ (R ２ ) p(R ３ ) group, provided that when X represents P-OH, A represents -OR ４ It is understood that this represents a group; p=0 or 1; ・R １ is a hydrogen atom or a hydroxyl group (-OH) or -NR ａ -R ｃ Group or -NR ａ -C-O-R ｃ represents a group; ・R ２ represents a hydrogen atom or a hydroxyl group (-OH) or an -X(O)OH group, where X is as defined above and in particular X represents a carbon atom; ・R ３ represents a hydrogen atom or a hydroxyl group (-OH) or an alkyl group or an alkenyl group or an alkylamino group or an alkylamide group, and the alkyl group or the alkenyl group or the alkylamino group or the alkylamide group is: -X(O)OH groups, where X is as defined above and in particular X represents a carbon atom; optionally substituted with one or more identical or different groups selected from hydroxyl groups (-OH) or (hetero)cyclic groups; and / or --O-, --NR ａ -, -S-, -CO- or a combination thereof, for example, -O-CO-, -(CO)-O-, -NR ａ -(CO)- or -(CO)-NR ａ -, optionally interrupted by one or more heteroatoms or groups selected from; R １ and R ３ together with the carbon atom to which they are attached, form the following group: １ ~C ６ ) alkyl, especially methyl, etc. １ ~C ４ ) alkyl, alkylcarbonyl-(CO)-R ｃ , alkylcarbonyloxy-O-CO-R ｃ , alkyloxycarbonyl-CO-O-R ｃ , —OH, (C １ ~C ６ ) alkoxy, especially methoxy, etc. １ ~C ４ ) alkoxy, -X(O)OH, where X is as defined above and in particular X represents a carbon atom, or -O-X(O)OH, where X is as defined above and in particular X=P-OH; R １ and R ３ can form a carbonyl group, -CO-, together with the carbon atom to which they are attached; ・R ４ represents a hydrogen atom or an alkyl or alkenyl group or a (hetero)cyclic group, said alkyl or alkenyl group or (hetero)cyclic group being optionally substituted with one or more identical or different groups selected from -X(O)OH, where X is as defined above and in particular X represents a carbon atom or P-OH; a hydroxyl group (-OH) or a (hetero)cyclic group; ・R ａ represents a hydrogen atom or is optionally substituted with one or more -X(O)OH groups, where X is as defined above and in particular X represents a carbon atom (C １ ~C ４ ) represents an alkyl group; ・R ｃ represents an alkyl group, an alkenyl group, an alkylamino group, or an alkylamide group, and the alkyl group, the alkenyl group, the alkylamino group, or the alkylamide group is: - optionally substituted with one or more identical or different groups selected from -X(O)OH groups, where X is as defined above and in particular X represents a carbon atom, hydroxyl groups (-OH) or (hetero)cyclic groups; and / or one or more hetero atoms or -O-, -S-, -CO-, -O-CO-, -O-CO-, -NR ａ -(CO)- or -(CO)-NR ａ -, optionally interrupted by a group selected from -, a salt thereof, an optical isomer thereof, a geometric isomer thereof, a tautomer thereof, a solvate thereof, and mixtures thereof; Preferably, the compound is selected from the following compounds 1 to 40, a salt thereof, an optical isomer thereof, a geometric isomer thereof, a tautomer thereof, a solvate thereof and a mixture thereof: 【Chemistry 2-1】 【Chemistry 2-2】 【Chemistry 2-3】 【Chemistry 2-4】 【Chemistry 2-5】 More preferentially, selected from compounds 1, 2, 3, 6, 7, 8, 9, 10, 15, 18, 22, 23, 26, 28 and 31, their salts, their optical isomers, their geometric isomers, their tautomers, their solvates and mixtures thereof; More preferentially, selected from compounds 1, 2, 6, 7, 8, 9, 10, 15, 18, 22, 23, 26, 28 and 31, their salts, their optical isomers, their geometric isomers, their tautomers, their solvates and mixtures thereof; Most preferentially, the compound is selected from compounds 1, 2, 26, 28 and 31, their salts, their optical isomers, their geometric isomers, their tautomers, their solvates and mixtures thereof.

18. 18. The method according to any one of the preceding claims, wherein said organic acids are present in the composition in a total content ranging from 0.01% to 50% by weight, preferably ranging from 1% to 30% by weight and more preferentially ranging from 2% to 15% by weight relative to the total weight of the composition.

19. 19. The method according to any one of the preceding claims, wherein the composition comprises magnesium carbonate in a total content of less than 5% by weight, preferably less than 1% by weight, more preferentially less than 0.1% by weight, even more preferentially less than 0.01% by weight and most preferentially less than 0.001% by weight, and better still, the composition is free of magnesium carbonate.

20. The method according to any one of the preceding claims, wherein the composition comprises persulfates in a total content of less than 1% by weight, preferably less than 0.1% by weight, more preferentially less than 0.01% by weight, even more preferentially less than 0.001% by weight, and most preferentially the composition is free of persulfates.

21. The method according to any one of claims 1 to 20, wherein the pH of the composition varies in the range from 8 to 11, preferably from 8 to 10.5, more preferentially from 8 to 10, even more preferentially from 8.3 to 10.

22. 22. The method according to claim 1 or 3, wherein the composition comprises a total content of colorants of less than 0.1% by weight, preferably less than 0.01% by weight and more preferentially less than 0.001% by weight relative to the total weight of the composition, and even more preferentially the composition is free of colorants.

23. The compositions were lightened using a composition containing one or more persulfates to achieve the same level of lightness L ＊ b measured on keratin fibers having ＊ value, b ＊ It makes it possible to achieve a lightening of keratin fibres, characterized by a low value of b, preferably 10% lower and more preferentially 15% lower, ＊ and L ＊ The values ​​are CIE L ＊ a ＊ b ＊ The method according to any one of claims 1 or 3 to 22, which is a measurement in a system.

24. The method according to any one of claims 1 to 23, wherein the composition according to any one of claims 1 to 22 comprises: A composition (A) comprising: - one or more chemical oxidizing agents selected from hydrogen peroxide, hydrogen peroxide generating systems other than persalts and mixtures thereof, according to claim 1 or 3; - optionally one or more organic acids according to claims 1 or 17; A composition (A) comprising: A composition (B) comprising: - one or more compounds selected from carbonates, carbonate-generating systems, bicarbonates, bicarbonate-generating systems and mixtures thereof according to claims 1, 8 or 11; - one or more silicates according to claim 1 or 12; - optionally one or more colorants chosen from direct dyes, oxidative dyes and mixtures thereof; A composition (B) comprising: Optional composition (C): one or more colorants chosen from direct dyes, oxidative dyes and mixtures thereof; - optionally one or more organic acids according to claims 1 or 17; A composition (C) comprising: and 20. The method of claim 19, wherein it is understood that composition (A), or, if composition (C) is present, at least one of compositions (A) and (C), comprises one or more organic acids according to claim 1 or 17.

25. The composition according to any one of claims 1 to 24, wherein said compound ii) is ammonium bicarbonate.

26. Use of a composition according to any one of claims 1 or 3 to 22 for lightening keratin fibres, preferably for lightening keratin fibres whilst simultaneously reducing their yellowness.

27. Use of a composition according to any one of claims 2 to 21 for simultaneously bleaching and dyeing keratin fibres.

28. 1. A device comprising multiple compartments: a first compartment containing the composition (A) according to claim 24; a second compartment containing the composition (B) according to claim 24; an optional third compartment containing the composition (C) according to claim 24; Equipped with However, it is understood that composition (A), or, if composition (C) is present, at least one of compositions (A) and (C), comprises one or more organic acids according to claim 1 or 17.

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