Process for treating keratin fibres comprising the dyeing of said fibres using a dyeing composition, followed by the bleaching thereof by applying a specific acidic aqueous composition

Abstract

The present invention relates to the field of the cosmetic treatment of keratin fibres, preferably the hair. The invention is directed toward proposing a process for treating keratin fibres using the bleaching of keratin fibres artificially dyed beforehand via a dyeing process using compounds of acetoacetate type and at least one pigment, by applying to said previously dyed keratin fibres an aqueous composition (D) having an acidic pH and comprising at least one particular acidic agent.

Description

[0001] Process for treating keratin fibres comprising the dyeing of said fibres using a dyeing composition, followed by the bleaching thereof by applying a specific acidic aqueous composition

[0002] The present invention relates to the field of the cosmetic treatment of keratin fibres, preferably the hair. The invention is directed toward proposing a process for treating keratin fibres using the bleaching of keratin fibres artificially dyed beforehand via a dyeing process using compounds of acetoacetate type and at least one pigment, by applying to said previously dyed keratin fibres an aqueous composition (D) having an acidic pH and comprising at least one particular acidic agent.

[0003] In the field of dyeing hair keratin fibres, it is known practice to dye fibres via various techniques using direct dyes or pigments in order to obtain non-permanent dyeing, or dye precursors in order to obtain permanent dyeing.

[0004] There are essentially three types of process for dyeing the hair: a) “permanent” dyeing, the function of which is to afford a substantial modification to the natural colour and which uses oxidation dyes which penetrate into the hair fibre and form the dye via an oxidative condensation process; b) non-permanent, semi-permanent or direct dyeing, which does not use the oxidative condensation process and withstands 4 or 5 shampoo washes; it consists in dyeing keratin fibres with dyeing compositions containing direct dyes; c) temporary dyeing, which gives rise to a modification of the natural colour of the head of hair which lasts from one shampoo wash to the next, and which serves to enhance or correct a shade that has already been obtained. It may also be likened to a hair “makeup” process.

[0005] A dyeing method consists for example in using pigments. Specifically, the use of pigments on the surface of keratin fibres generally makes it possible to obtain colourings that are visible also on dark hair, since the surface pigment masks the prior colour of the fibre.

[0006] Thus, “hair makeup” products have recently been developed, which provide temporary hair colour that lasts for several shampoo washes. They are a particularly attractive alternative for consumers to permanent hair dyeing, provided that the colouring effect is effectively guaranteed to last after contact with water and a few shampoo washes. This requirement may notably be satisfied by the use of effective film- forming agents. Thus, document WO 2024 / 126519 describes for example the use of acetoacetylated compounds and dyestuffs, notably pigments, for temporarily dyeing keratin fibres. The keratin fibres thus treated exhibit an intense, uniformly coloured coating which is shampoo resistant.

[0007] The temporary colouring based on acetoacetylated compound technology is particularly effective and persistent with respect to washing. However, the user of temporary hair colourings obtained via acetoacetylated compound technology may wish, at a given moment, to return to their prior colour or to change colour or even to create locks of different colour. However, at this time, there are no compositions for satisfactorily eliminating this type of temporary colouring with aceto acetylated compounds associated with at least one pigment from the keratin fibres (i.e. "taking said temporary-colouring makeup off keratin fibres").

[0008] There is thus still a real need for treatment processes which make it possible to efficiently and rapidly eliminate from the keratin fibres an artificial dyeing obtained beforehand using acetoacetate compound(s) and at least one pigment; in particular, allowing uniform elimination / makeup removal for an aesthetic result, which are easy to use on the keratin fibres to be treated, namely without any risk of running during application, which do not generate any unpleasant odour and which make it possible to preserve the integrity of the keratin fibres.

[0009] Moreover, the formulation of environmentally friendly cosmetic products, i.e., products designed and developed while taking account of environmental issues, is becoming a major concern in helping to meet global challenges.

[0010] It thus proves essential to propose more sustainable compositions, thereby making it possible to respond to these environmental issues by reducing in particular the use of compounds of petrochemical origin.

[0011] The present invention enables these needs to be met.

[0012] A subject of the present invention is notably a process for treating keratin fibres, comprising, in the following order: a) a dyeing step comprising the application to the keratin fibres of at least one dyeing composition (C) comprising:

[0013] (i) at least one compound of formula (I) as described below; and

[0014] (ii) at least one pigment; then b) a step of eliminating the dyeing from the keratin fibres obtained via step a), comprising the application to said dyed keratin fibres of an aqueous composition (D) having an acidic pH and comprising at least one acidic agent chosen from organic acids, mineral acids, and mixtures thereof; then c) a step of applying to said keratin fibres a washing composition comprising at least one surfactant.

[0015] Step a) of the treatment process according to the invention makes it possible to obtain smooth, uniformly coloured coatings. It provides visible dyeing on all types of fibres, which is resistant to water and notably to shampoo washes and sebum. Such a coating may be resistant to the various external attacking factors to which keratin fibres may be subjected, for instance blow-drying, brushing, friction and perspiration.

[0016] Steps b) and c) of the treatment process according to the invention make it possible to easily and efficiently eliminate the artificial dyeing from the keratin fibres obtained in step a). The artificial dyeings obtained using acetoacetate compound(s) and at least one pigment are thus easily and efficiently eliminated from the keratin fibres.

[0017] Advantageously, steps b) and c) of the treatment process according to the invention eliminate an artificial dyeing from the keratin fibres using the compounds of acetoacetate type of formula (I) as described subsequently, optionally crosslinked with a (poly)amine compound as described below and at least one pigment.

[0018] The process for treating keratin fibres according to the invention thus makes it possible to obtain, on conclusion of step a), a beautiful, intense, sparingly selective, chromatic dyeing which is resistant to water and to perspiration. Then, in a second step, the treatment process according to the invention makes it possible to eliminate / remove / take off the artificial dyeing from the keratin fibres obtained beforehand on conclusion of step a), and thus to regain the keratin fibres in the form prior to step a).

[0019] Thus, when step a) is carried out on the undyed keratin fibres, then, on conclusion of step c) of the process of the invention, the keratin fibres are undyed. Similarly, when step a) is performed on the previously dyed keratin fibres, then, on conclusion of step c) of the process of the invention, the keratin fibres are dyed as they were before performing step a).

[0020] The acidic composition (D) according to the invention is particularly easy to apply uniformly to the keratin fibres and does not give off any unpleasant odour. A subject of the invention is also a process for eliminating an artificial dyeing from the keratin fibres, comprising at least the application to the dyed keratin fibres of an aqueous composition (D) having an acidic pH and comprising at least one acidic agent chosen from organic acids, mineral acids, and mixtures thereof; said artificial dyeing of keratin fibres having been obtained by application to said keratin fibres of a dyeing composition (C) as described below.

[0021] A subject of the invention is also the use of an aqueous composition (D) having an acidic pH and comprising at least one acidic agent chosen from organic acids, mineral acids, and mixtures thereof, for eliminating the artificial dyeing from the keratin fibres dyed beforehand, using a composition (C) as described previously.

[0022] Other subjects, features, aspects and advantages of the invention will become more apparent on reading the description and the example that follows.

[0023] For the purposes of the present invention and unless otherwise indicated:

[0024] - the expression “at least one” is equivalent to the expression “one or more” and can be replaced therewith;

[0025] - the expression “between... and...” is equivalent to the expression “ranging from... to...” and can be replaced therewith, and implies that the limits are included;

[0026] - for the purposes of the present invention, the term “greater than” and, respectively, the term “less than” is intended to mean an open range which is strictly greater, or, respectively, strictly less, and thus that the limits are not included;

[0027] - according to the present application, the term “keratin fibres” is understood to mean in particular human keratin fibres such as the hair, the eyelashes, the eyebrows, and body hair, preferentially the hair, the eyebrows and the eyelashes, even more preferentially the hair;

[0028] - for the purposes of the present invention, the term “hair" is understood as meaning head hair. This term does not correspond to body hair, eyebrows or eyelashes;

[0029] - for the purposes of the present invention, the term “dyeing that is persistent with respect to shampoo washing" means that the dyeing obtained persists after at least one shampoo wash, particularly after at least 3 shampoo washes, preferably after at least 5 shampoo washes;

[0030] - an “aryl” radical represents a monocyclic or fused or non-fused polycyclic hydrocarbon group comprising from 6 to 14 carbon atoms, and at least one ring of which is aromatic; preferentially, the aryl radical is a phenyl, biphenyl, naphthyl, indenyl, anthracenyl or tetrahydronaphthyl;

[0031] - a “heteroaryl” radical represents a monocyclic or fused or non-fused polycyclic, 5- to 14-membered group, comprising from 1 to 6 heteroatoms chosen from nitrogen, oxygen, sulfur and selenium atoms, and at least one ring of which is aromatic; preferentially, a heteroaryl radical is chosen from acridinyl, benzimidazolyl, benzobistriazolyl, benzopyrazolyl, benzopyridazinyl, benzoquinolyl, benzothiazolyl, benzotriazolyl, benzoxazolyl, pyridinyl, tetrazolyl, dihydrothiazolyl, imidazopyridinyl, imidazolyl, indolyl, isoquinolyl, naphthoimidazolyl, naphthooxazolyl, naphthopyrazolyl, oxadiazolyl, oxazolyl, oxazolopyridyl, phenazinyl, phenoxazolyl, pyrazinyl, pyrazolyl, pyrilyl, pyrazoyltriazyl, pyridyl, pyridinoimidazolyl, pyrrolyl, quinolyl, tetrazolyl, thiadiazolyl, thiazolyl, thiazolopyridinyl, thiazoylimidazolyl, thiopyrylyl, triazolyl and xanthylyl;

[0032] - the term “(hetero)aryl” means aryl or heteroaryl groups;

[0033] - the term “(hetero)cycloalkyl” means cycloalkyl or heterocycloalkyl groups;

[0034] - the “aryl” or “heteroaryl” radicals or the aryl or heteroaryl part of a radical may be substituted with at least one substituent borne by a carbon atom, chosen from:

[0035] • a Ci-C6, preferably C1-C4, alkyl radical;

[0036] • a halogen atom such as chlorine, fluorine or bromine;

[0037] • a hydroxyl group;

[0038] • a C1-C2 alkoxy radical; a C2-C4 (poly)hydroxyalkoxy radical;

[0039] • an amino radical;

[0040] • an amino radical substituted with one or two identical or different Ci-Ce, preferably C1-C4, alkyl radicals;

[0041] • an acylamino radical (-N(R)-C(O)-R’) in which the radical R is a hydrogen atom;

[0042] • a C1-C4 alkyl radical and the radical R’ is a C1-C4 alkyl radical; a carbamoyl radical (R2N-C(O)-) in which the radicals R, which may be identical or different, represent a hydrogen atom or a C1-C4 alkyl radical;

[0043] • an alkylsulfonylamino radical (R’S(O)2-N(R)-) in which the radical R represents a hydrogen atom or a C1-C4 alkyl radical and the radical R’ represents a C1-C4 alkyl radical, or a phenyl radical;

[0044] • an aminosulfonyl radical (R2N-S(O)2-) in which the radicals R, which may be identical or different, represent a hydrogen atom, or a C1-C4 alkyl radical; • a carboxylic radical in acid form or salified (preferably with an alkali metal or a substituted or unsubstituted ammonium) form;

[0045] • a cyano group (CN);

[0046] • a polyhalo(Ci-C4)alkyl group, preferentially trifluoromethyl (CF3);

[0047] - the cyclic or heterocyclic part of a non-aromatic radical may be substituted with at least one substituent borne by a carbon atom, chosen from the following groups:

[0048] • hydroxyl;

[0049] • C1-C4 alkoxy, C2-C4 (poly )hydroxy alkoxy;

[0050] • alkylcarbonylamino (RC(O)-NR’-), in which the radical R’ is a hydrogen atom or a C1-C4 alkyl radical and the radical R is a C1-C4 alkyl radical, amino substituted with one or two identical or different C1-C4 alkyl groups;

[0051] • alkylcarbonyloxy (RC(O)-O-), in which the radical R is a C1-C4 alkyl radical, amino substituted with one or two identical or different C1-C4 alkyl groups;

[0052] • alkoxycarbonyl (RO-C(O)-) in which the radical R is a C1-C4 alkyl radical;

[0053] - a cyclic or heterocyclic radical, or a non-aromatic part of an aryl or heteroaryl radical, may also be substituted with one or more oxo groups;

[0054] - a hydrocarbon chain is unsaturated when it includes one or more double bonds and / or one or more triple bonds, preferably one or more double bonds;

[0055] - a “cyclic” or “cycloalkyl” radical is a monocyclic or fused or non-fused polycyclic, non-aromatic cyclic hydrocarbon radical containing from 5 to 14 carbon atoms, which may include one or more unsaturations; the cycloalkyl is preferably a cyclohexyl group;

[0056] - a “heterocyclic” or “heterocycloalkyl” radical is a monocyclic or fused or non-fused polycyclic 3- to 9-membered non-aromatic cyclic radical, including from 1 to 4 heteroatoms chosen from nitrogen, oxygen, sulfur and selenium atoms; preferably, the heterocycloalkyl is chosen from epoxide, piperazinyl, piperidinyl, morpholinyl and dithiolane;

[0057] - an “alkyl” radical is a linear or branched, in particular Ci-Ce and preferably C1-C4 saturated hydrocarbon radical;

[0058] - an “alkoxy” radical is an alkyl-oxy radical for which the alkyl radical is a linear or branched Ci-Ce and preferentially C1-C4 hydrocarbon radical;

[0059] - a “(poly)(hydroxy)alkyl” radical refers to a Ci-Ce, preferably C1-C4, alkyl radical optionally substituted with one or more hydroxyl radicals, preferably substituted with from 1 to 4 hydroxy groups, more particularly between 1 and 3; - a “sugar” radical is a monosaccharide or disaccharide radical. Sugar radicals that may be mentioned include: sucrose, glucose, galactose, ribose, fucose, maltose, fructose, mannose, arabinose, xylose or lactose;

[0060] - the term “monosaccharide” refers to a mono-oside sugar comprising at least 5 carbon atoms, in particular of formula CX(H2O)Xwith x an integer greater than or equal to 5, preferably x is greater than or equal to 6, in particular x is between 5 and 7 inclusive, preferably x = 6, they may be of D or L configuration, and of alpha or beta anomer, and also the salts thereof and the solvates thereof such as hydrates;

[0061] - the term " disaccharide” refers to a di-oside sugar which is a compound constituted of two saccharides bonded together via O-oside bonds, said compounds being constituted of two monosaccharide units (also known as mono-osides) as defined previously, said monosaccharide units comprising at least 5 carbon atoms, preferably 6; in particular, the mono-oside units are linked together via a 1,4 or 1,6 bond as a (alpha) or p (beta) anomer, it being possible for each oside unit to be of L or D configuration, and also the salts thereof and the solvates thereof such as the hydrates of said monosaccharides; more particularly, they are compounds formed from two saccharides (or monosaccharides) having the general formula: -[Cx(H2O)y)]2- or - [(CH2O)X]2-, with x being an integer greater than or equal to 5, preferably x is greater than or equal to 6, in particular x is between 5 and 7 inclusive, preferably x = 6, and y is an integer representing x - 1 ;

[0062] - the term "polysaccharide” refers to a polyoside sugar which is a polymer constituted of at least 3 saccharides bonded together via O-oside bonds, said polymers being constituted of monosaccharide units (also known as mono-oside units) as defined previously, said monosaccharide units comprising at least 5 carbon atoms, preferably 6; in particular, the mono-oside units are linked together via a 1,4 or 1,6 bond as a (alpha) or (beta) anomer, it being possible for each oside unit to be of L or D configuration, and also the salts thereof and the solvates thereof such as the hydrates of said monosaccharides; more particularly, they are polymers formed from a certain number of saccharides (or monosaccharides) having the general formula: - [Cx(H2O)y)]w- or -[(CH2O)X]W-, where x is an integer greater than or equal to 5, preferably x is greater than or equal to 6, in particular x is between 5 and 7 inclusive and preferably x = 6, and y is an integer which represents x - 1, and w is an integer greater than or equal to 2, particularly between 3 and 3000 inclusive, more particularly between 5 and 2500, preferentially between 10 and 2300, particularly between 15 and 1000 inclusive, more particularly between 20 and 500, preferentially between 25 and 200;

[0063] - the term “organic or mineral acid salt” more particularly means a) addition salts with an organic or mineral acid in particular chosen from a salt derived from i) hydrochloric acid HC1, ii) hydrobromic acid HBr, iii) sulfuric acid H2SO4, iv) alkylsulfonic acids: Alk-S(O)2OH, such as methylsulfonic acid and ethylsulfonic acid; v) arylsulfonic acids: Ar-S(O)2OH, such as benzenesulfonic acid and toluenesulfonic acid; vi) alkoxysulfinic acids: Alk-O-S(O)OH such as methoxysulfinic acid and ethoxysulfinic acid; vii) aryloxysulfinic acids such as tolueneoxysulfinic acid and phenoxysulfinic acid; viii) phosphoric acid H3PO4; ix) triflic acid CF3SO3H and x) tetrafluoroboric acid HBF4; xi) organic carboxylic acids R°-C(O)-OH (I’z), in which formula (I’z) R° represents a (hetero)aryl group such as phenyl, (hetero)aryl(Ci-C4)alkyl group such as benzyl, or (Ci-Cio)alkyl, said alkyl group being optionally substituted preferably with one or more hydroxyl groups or amino or carboxyl radicals, R° preferably denoting a (Ci-C6)alkyl group optionally substituted with 1, 2 or 3 hydroxyl or carboxyl groups; more preferentially, the monocarboxylic acids of formula (I’z) are chosen from acetic acid, glycolic acid, lactic acid, and mixtures thereof, and more particularly from acetic acid and lactic acid; and the polycarboxylic acids are chosen from tartaric acid, succinic acid, fumaric acid and citric acid, and mixtures thereof; and xii) amino acids comprising more carboxylic acid radicals than amino groups, such as gamma-carboxyglutamic acid, aspartic acid, glutamic acid, in particular gamma-carboxyglutamic acid; or b) addition salts with an organic or mineral base, such as alkali metal or alkaline-earth metal hydroxides, alkali metal or alkaline-earth metal carbonates, alkali metal or alkaline-earth metal bicarbonates, addition salts with “basic” amino acids such as arginine or lysine, and addition salts with optionally hydroxylated amines;

[0064] - an “anionic counterion” is an anion or an anionic group associated with the cationic charge; more particularly, the anionic counterion is chosen from: i) halides such as chloride or bromide; ii) nitrates; iii) sulfonates, including Ci-Ce alkyl sulfonates: Alk- S(O)2O’ such as methyl sulfonate or mesylate and ethyl sulfonate; iv) aryl sulfonates: Ar-S(O)2O" such as benzenesulfonate and toluenesulfonate or tosylate; v) citrate; vi) succinate; vii) tartrate; viii) lactate; ix) alkyl sulfates: Alk-O-S(O)O" such as methyl sulfate and ethyl sulfate; x) aryl sulfates: Ar-O-S(O)O" such as benzene sulfate and toluene sulfate; xi) alkoxy sulfates: Alk-O-S(O)2O" such as methoxy sulfate and ethoxy sulfate; xii) aryloxy sulfates: Ar-O-S(O)2O"; xiii) phosphate; xiv) acetate; xv) triflate; and xvi) borates such as tetrafluoroborate.

[0065] - “Solvates” represent hydrates and also the combination with linear or branched Ci- C4 alcohols such as ethanol, isopropanol or n-propanol;

[0066] - “Anhydrous” is understood as meaning containing an amount of less than 5% by weight of water, preferentially less than 3% by weight of water, better still less than 1% by weight of water, relative to the total weight of the composition in question; even more preferentially, the composition in question is free of water.

[0067] - The terms “dyeing agent” and “dyestuff’ are equivalent.

[0068] Unless otherwise mentioned, the amounts stated are expressed as percentages by mass.

[0069] Process for treating keratin fibres

[0070] The process according to the invention is a process for treating keratin fibres, comprising, in the following order: a) an artificial dyeing step comprising the application to the keratin fibres of at least one dyeing composition (C) comprising:

[0071] (i) at least one compound of formula (I) as described below; and

[0072] (ii) at least one pigment; then b) a step of eliminating the artificial dyeing from said keratin fibres obtained via step a), comprising the application to the dyed keratin fibres of an aqueous composition (D) having an acidic pH and comprising at least one acidic agent chosen from organic acids, mineral acids, and mixtures thereof; then c) a step of applying to the keratin fibres a washing composition comprising at least one surfactant.

[0073] During step a) of the process of the invention, the keratin fibres to be treated are dyed using a dyeing composition (C) as described below.

[0074] Composition (C):

[0075] Step a) of the treatment process according to the invention consists in applying to the keratin fibres a dyeing composition (C) comprising at least one compound of formula (I) (i.e. acetoacetylated compounds) and at least one pigment, and optionally at least one (poly)amine compound. Compound of formula (I)

[0076] The composition (C) comprises at least one compound of formula (I) below:

[0077] - R1represents a linear or branched, saturated or unsaturated, conjugated or nonconjugated, acyclic or cyclic, aromatic or non-aromatic C2 to C14 polyvalent hydrocarbon radical, R1also being: a) optionally substituted with one or more hydroxyl OH or dialkylamino -N(R)2 groups with R representing a (Ci-C4)alkyl group, a carboxy -C(O)-OH group or a vinyl group, and / or b) optionally interrupted with one or more heteroatoms or groups chosen from O, S, carbonyl -C(O)-, amine -N(R'), or combinations thereof, in which R' represents a hydrogen atom, a linear or branched alkyl group having from 1 to 4 carbon atoms, optionally substituted with at least one hydroxyl (OH) group or optionally substituted with -X-C(O)-C(Ra)(Rb)-C(O)-R2;

[0078] - R2represents a linear or branched, saturated or unsaturated Ci to Ce monovalent hydrocarbon radical;

[0079] - Raand Rb, which may be identical or different, represent a hydrogen atom or a (Ci- C4)alkyl group;

[0080] - X is a heteroatom or group chosen from O, S, N(R’) or -S-CH2-C(O)-O-, -O-C(O)-CH2-S-, -O-C(O)-N(R’)-, -N(R’)-C(O)-O-, -N(R’)-C(O)-N(R’)-;

[0081] - n denotes an integer ranging from 2 to 10, particularly from 3 to 9.

[0082] Preferably, the compound of formula (I) is chosen from those of formula (la) below. Formula (la) encompasses the optical isomers, geometrical isomers, salts, and the solvates such as the hydrates of the compound. in which:

[0083] - R1is as defined previously, and particularly represents a linear or branched, saturated or unsaturated, conjugated or non-conjugated, acyclic or cyclic, aromatic or non-aromatic C2 to C14, preferably C3 to C12 and preferably C4 to C10 polyvalent hydrocarbon radical, R1also being: a) optionally substituted with one or more hydroxyl OH groups, and / or b) optionally interrupted with one or more heteroatoms or groups chosen from O, S, -N(R’), preferably interrupted with one or more oxygen atoms, in which R’ is as defined in formula (I);

[0084] - R2is as defined previously, preferably R2represents a linear or branched (Ci-Cejalkyl group, preferably a (Ci-C4)alkyl group, particularly methyl or tert-butyl, such as methyl; and

[0085] - n being as defined in formula (I), and preferably n denotes an integer ranging from 2 to 9.

[0086] The compounds of formulae (I) and (la) may be such that R1represents a linear or branched, unsaturated monocyclic or bicyclic, preferably monocyclic, Ce to Cs polyvalent hydrocarbon radical, which is optionally aromatic, such as phenyl.

[0087] The compounds of formulae (I) and (la) may also be such that R1represents a saturated monocyclic or bicyclic C5 to C12 polyvalent hydrocarbon radical, optionally interrupted with one or more heteroatoms or groups chosen from O, S and -N(R’), in which R’ represents a hydrogen atom or an alkyl group containing from 1 to 4 carbon atoms, preferably interrupted with one or more oxygen atoms. Preferably, R1represents a monosaccharide or polysaccharide unit, notably a disaccharide, on which n hydroxyl groups have been substituted with n groups -O-C(O)-CH2-C(O)- R2, with R2as defined previously and n as defined previously.

[0088] Suitable monosaccharides according to the invention include, but are not limited to, ribose, glucose, mannose, galactose, fructose, sorbose and inositol. Advantageously, the disaccharides are chosen from cellobiose, maltose, lactose, raffinose, sucrose, trehalose, melibiulose, melibiose, mannobiose, kojibiose, nigerose, isomaltose, rutinose, rutinulose and xylobiose, preferably sucrose.

[0089] The compounds of formulae (I) and (la) may also be such that R1represents a linear or branched, saturated or unsaturated, more preferentially saturated, acyclic C2-C12, preferably C3-C10, polyvalent hydrocarbon radical.

[0090] Preferably, the compounds of formulae (I) and (la) are such that R1represents an acyclic polyvalent hydrocarbon radical chosen from the radicals mannitol, xylitol, sorbitol, trimethylolpropane, di (trimethylolpropane), 2-methyl-l,3- propanediol, 2-hydroxymethyl- 1 ,3-propanediol, 2,2-dimethyl- 1 ,3-propanediol, erythritol, pentaerythritol or dipentaerythritol, preferably mannitol, xylitol, sorbitol, trimethylolpropane, di(trimethylolpropane), 2-methyl-l,3-propanediol, 2- hydroxymethyl-l,3-propanediol, erythritol, pentaerythritol or dipentaerythritol, more preferentially pentaerythritol or dipentaerythritol.

[0091] Preferably, the compounds of formulae (I) and (la) are such that n denotes an integer ranging from 2 to 9; more particularly, n denotes an integer ranging from 3 to 9, more particularly from 4 to 9, such as 6 or 8. The compounds of formula (I) may be such that n is 2. The compounds of formula (I) may be such that n is 3. The compounds of formula (I) may be such that n is 4. The compounds of formula (I) may be such that n is 5. The compounds of formula (I) may be such that n is 6. The compounds of formula (I) may be such that n is 7. The compounds of formula (I) may be such that n is 8. The compounds of formula (I) may be such that n is 9. The compounds of formula (I) may be such that n is 10.

[0092] More particularly, the compound(s) of formulae (I) and (la) are chosen from the following compounds, and also the optical isomers thereof, the salts thereof, and the solvates thereof, such as hydrates:

[0093]

[0094]

[0095] in which Rl, which may be identical or different, represents a hydrogen atom or a -C(O)-CH2-C(O)-CH3 group, it being understood that at least two radicals Rl represent a -C(O)-CH2-C(O)-CH3 group, preferably at least three radicals Rl represent a -C(O)-CH2-C(O)-CH3 group. Preferably, the compounds of formulae (I) and (la) are chosen from compounds (16), (18), (21), (35), (36), (37), (38), (39), (40) and (46), and mixtures thereof, more preferentially from compounds (16), (21), (35), (38), (39) and (46), and mixtures thereof, even more preferentially from compounds (21) and (35), and mixtures thereof.

[0096] The compound(s) of formula (I) may be obtained by (poly)condensation(s) of n equivalents of dicarbonyl reagent with a nucleophilic reagent R1(XH)nincluding n equivalents of nucleophilic functions -XH according to the following scheme: in which:

[0097] - R1, R2, Ra, Rband n are as defined for the compound of formula (I); and

[0098] - R3represents a hydrogen atom, a (Ci-C4)alkyl group such as methyl, ethyl, isobutyl, t-butyl, or an electrofugal group such as CHah, or HakC-SOi- such as triflate, with Hal, which may be identical or different, representing a halogen atom;

[0099] - X’ represents an oxygen or sulfur atom, preferably O.

[0100] These (poly)condensation methods are known to a person skilled in the art; mention may be made, for example, of “From rigid and flexible foams to elastomers via Michael addition chemistry”, Polymer, 106, 128-139, (2016), “Dynamic Curing Agents for Amine-Hardened Epoxy Vitrimers with Short (Re)processing Times”, Macromolecules, 53(7), 2485-2495 (2020), “Super photo-base initiated organic- inorganic hybrid coatings by plural-cure mechanisms”, Progress in Organic Coatings, 127, 222-230 (2019) or Patent Application PL159100: Method for manufacturing acetylacetate esters.

[0101] The compound R1(XH)ncan be chosen from acyclic polyols R1(OH)nnotably chosen from glycerol, trimethylolpropane, ethylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, propylene glycol, dipropylene glycol, butylene glycol, trimethylolethane, pentamethylene glycol, trimethylpentanediol, pentyl glycol, isosorbide, pentaerythritol, dipentaerythritol, hexamethylene glycol, hexylene glycol, hexanediol, neopentyl glycol, 1,2-propanediol; 1,3-propanediol; 1,2- butanediol, 1,3-butanediol, 2,3-butanediol, 1,4-butanediol; 2,4-butanediol, 3,4- butanediol; 1,4-pentanediol; 1,5-pentanediol, 2,2,4-trimethyl-l,3-pentanediol, 1,6- hexanediol, 1,2-octanediol, 1,8-octanediol, 1,10-decanediol, 2-methyl-l,3- propanediol, hexylene glycol and isoprene glycol.

[0102] The compound R1(XH)ncan also be chosen from cyclic polyols R1(OH)nnotably chosen from monosaccharides and disaccharides, as defined previously, alone or as mixtures.

[0103] Preferentially, R1(XH)nis chosen from polyols R1(OH)n, alone or as mixtures, from mannitol, xylitol, sorbitol, glycerol, glucose, trimethylolethane, trimethylolpropane, di(trimethylolpropane), 2-methyl-l,3-propanediol, 2- hydroxymethyl- 1 ,3-propanediol, 2,2-dimethyl- 1 ,3-propanediol, erythritol, pentaerythritol, dipentaerythritol, and mixtures thereof, more particularly from trimethylolethane, trimethylolpropane, erythritol, pentaerythritol, glycerol, glucose, sucrose and sorbitol, and mixtures thereof. In addition, the compound R1(XH)ncan be chosen from the diamines R^NEh , notably from hydroxyalkyl aliphatic diamines such as o,o'-bis(diethanolaminomethyl)-p-nonylphenol, N,N,N,N'-tetra(2- hydroxypropyl)ethylenediamine (Quadrol L, available from BASF) and N,N,N,N- tetra(2-hydroxyethyl)ethylenediamine, and mixtures thereof.

[0104] Advantageously, the compound(s) of formula (I) are obtained by (poly)condensation(s) of n equivalents of propylenedioxy carbonyl reactant with a polyamine nucleophilic reactant R1(NH2)nincluding n equivalents of -NH2 nucleophilic functions according to the following scheme: in which:

[0105] - R1, R2, Raand n are as defined for the compound of formula (I);

[0106] - R1-NH2is notably chosen from ethylenediamine, 1,3-diaminopropane, cadaverine, hexamethylenediamine, 1,2-diaminopropane, 1,2-diaminocyclohexane and phenylenediamine; and

[0107] - Rband Rc, which may be identical or different, represent a hydrogen atom or a (Ci-C4)alkyl group.

[0108] This type of synthesis process is known to a person skilled in the art; mention may be made, for example, of “Acetoacetylation with 2,2,6-trimethyl-4H-l,3-dioxin- 4-one: a convenient alternative to diketene”, Journal of Organic Chemistry, 50(14), 2431-5, (1985) or “Synthesis of new Biginelli polycondensates: renewable materials with tunable high glass transition temperatures”, Polymer International, 70(5), 506- 513 (2021).

[0109] Preferably, the compound(s) of formula (I) are obtained by (poly)condensation(s) of n equivalents of diketene reactant with a nucleophilic reactant Rx(X)nincluding n equivalents of nucleophilic functions -XH according to the following scheme: in which:

[0110] - R1and n are as defined for the compound of formula (I);

[0111] - X’ represents an oxygen or sulfur atom, or N(R’) with R’ = H.

[0112] This type of process is known to a person skilled in the art. Mention may be made, for example, of “Acetoacetamides, 2-hydroximinoacetoacetamides, and 2,3- bis(hydroximino)butyramides”, Journal fur Praktische Chemie (Leipzig), 323(2), 337-44, (1981) or Angewandte Makromolekulare Chemie, 9, 96-105, (1969).

[0113] Preferably, the total content of compound(s) of formula (I) present in composition (C) is within the range extending from 0.1% to 45% by weight, preferentially from 0.5% to 35% by weight, more preferentially from 1% to 30%, even more preferentially from 5% to 25% by weight, relative to the total weight of composition (C).

[0114] Preferably, the total content of compound(s) of formula (la) present in composition (C) is within the range extending from 0.1% to 45% by weight, preferentially from 0.5% to 35% by weight, more preferentially from 1% to 30%, even more preferentially from 5% to 25% by weight, relative to the total weight of composition (C).

[0115] Preferably, the total content of compound(s) (1) to (46) present in composition (C) is within the range extending from 0.1% to 45% by weight, preferentially from 0.5% to 35% by weight, more preferentially from 1% to 30%, even more preferentially from 5% to 25% by weight, relative to the total weight of composition (C). Pigment

[0116] The composition (C) comprises at least one pigment.

[0117] A “pigment” refers to any pigment that imparts colour to keratin materials. Their solubility in water at 25°C and at atmospheric pressure (760 mmHg) is less than 0.05% by weight, and preferably less than 0.01% (in g / 1 of water).

[0118] The pigments used are chosen in particular from the organic and / or mineral pigments known in the art, especially those described in the Kirk-Othmer Encyclopedia of Chemical Technology and in Ullmann’s Encyclopedia of Industrial Chemistry.

[0119] They may be natural, of natural origin, or non-natural.

[0120] These pigments can be provided in the form of a pigment paste or powder. They can be coated or uncoated.

[0121] The pigments can, for example, be chosen from mineral pigments, organic pigments, lakes, special-effect pigments, such as nacreous agents or glitter flakes, and mixtures thereof.

[0122] The pigment may be a mineral pigment. A “mineral pigment” is understood as meaning any pigment that meets the definition in Ullmann’s Encyclopedia in the chapter on inorganic pigments. Mineral pigments that are useful in the present invention include iron or chromium oxides, manganese violet, ultramarine blue, chromium hydrate, ferric blue and titanium oxide.

[0123] The pigment may be an organic pigment. An “organic pigment” is understood as meaning any pigment that meets the definition in Ullmann’s Encyclopedia in the chapter on organic pigments.

[0124] The organic pigment may especially be chosen from nitroso, nitro, azo, xanthene, pyrene, quinoline, anthraquinone, triphenylmethane, fluorane, phthalocyanine, metal-complex, isoindolinone, isoindoline, quinacridone, perinone, perylene, diketopyrrolopyrrole, indigo, thioindigo, dioxazine, triphenylmethane and quinophthalone compounds.

[0125] In particular, the white or coloured organic pigments may be chosen from carmine, carbon black, aniline black, azo yellow, quinacridone, phthalocyanine blue, the blue pigments codified in the Color Index under the references CI 42090, 69800, 69825, 74100 and 74160, the yellow pigments codified in the Color Index under the references CI 11680, 11710, 19140, 20040, 21100, 21108, 47000 and 47005, the green pigments codified in the Color Index under the references CI 61565, 61570 and 74260, the orange pigments codified in the Color Index under the references CI 11725, 45370 and 71105, the red pigments codified in the Color Index under the references CI 12085, 12120, 12370, 12420, 12490, 14700, 15525, 15580, 15620, 15630, 15800, 15850, 15865, 15880, 26100, 45380, 45410, 58000, 73360, 73915 and 75470, and the pigments obtained by oxidative polymerization of indole or phenol derivatives as are described in Patent FR 2 679 771.

[0126] Examples that may also be mentioned include pigment pastes of organic pigments, such as the products sold by Hoechst under the name:

[0127] - Cosmenyl Yellow 10G: Pigment Yellow 3 (CI 11710);

[0128] - Cosmenyl Yellow G: Pigment Yellow 1 (CI 11680);

[0129] - Cosmenyl Orange GR: Pigment Orange 43 (CI 71105);

[0130] - Cosmenyl Red R: Pigment Red 4 (CI 12085);

[0131] - Cosmenyl Carmine FB: Pigment Red 5 (CI 12490);

[0132] - Cosmenyl Violet RL: Pigment Violet 23 (CI 51319);

[0133] - Cosmenyl Blue A2R: Pigment Blue 15.1 (CI 74160);

[0134] - Cosmenyl Green GG: Pigment Green 7 (CI 74260);

[0135] - Cosmenyl Black R: Pigment Black 7 (CI 77266).

[0136] The pigments in accordance with the invention may also be in the form of composite pigments, as described in Patent EP 1 184 426. These composite pigments can be composed in particular of particles comprising an inorganic core, at least one binder providing the attaching of the organic pigments to the core, and at least one organic pigment at least partially covering the core.

[0137] The organic pigment can also be a lake. The term “lake” refers to dyes adsorbed onto insoluble particles, the assembly thus obtained remaining insoluble during use.

[0138] The inorganic substrates onto which the dyes are adsorbed are, for example, alumina, silica, calcium sodium borosilicate or calcium aluminium borosilicate, and aluminium.

[0139] Mention may be made, among the dyes, of carminic acid. Mention may also be made of the dyes known under the following names: D & C Red 21 (CI 45 380), D & C Orange 5 (CI 45 370), D & C Red 27 (CI 45 410), D & C Orange 10 (CI 45 425), D & C Red 3 (CI 45 430), D & C Red 4 (CI 15 510), D & C Red 33 (CI 17 200), D & C Yellow 5 (CI 19 140), D & C Yellow 6 (CI 15 985), D & C Green (CI 61 570), D & C Yellow 1 O (CI 77 002), D & C Green 3 (CI 42 053), D & C Blue 1 (CI 42 090).

[0140] An example of a lake that may be mentioned is the product known under the following name: D&C Red 7 (CI 15 850:1).

[0141] The pigment may also be a special-effect pigment. The term “special-effect pigments” means pigments that generally create a coloured appearance (characterized by a certain shade, a certain vivacity and a certain level of luminance) that is non- uniform and that changes as a function of the conditions of observation (light, temperature, angles of observation, etc.). They thereby contrast with coloured pigments, which provide a conventional uniform opaque, semi-transparent or transparent colour.

[0142] Several types of special-effect pigments exist: those with a low refractive index, such as fluorescent or photochromic pigments, and those with a higher refractive index, such as nacres, interference pigments or glitter flakes.

[0143] Examples of special-effect pigments that may be mentioned include nacreous pigments such as mica coated with titanium or with bismuth oxychloride, coloured nacreous pigments such as mica covered with titanium and with iron oxides, mica covered with iron oxide, mica covered with titanium and notably with ferric blue or with chromium oxide, mica covered with titanium and with an organic pigment as defined previously, and also nacreous pigments based on bismuth oxychloride. Nacreous pigments that may be mentioned include the nacres Cellini sold by BASF (mica-TiCE-lake), Prestige sold by Eckart (mica-TiCE), Prestige Bronze sold by Eckart (mica-FciCh) and Colorona sold by Merck (mica-TiOi-FciCh).

[0144] Mention may also be made of the gold-coloured nacres sold notably by BASF under the name Brilliant Gold 212G (Timica), Gold 222C (Cloisonne), Sparkle Gold (Timica), Gold 4504 (Chromalite) and Monarch Gold 233X (Cloisonne); bronze nacres sold notably by Merck under the name Bronze Fine (17384) (Colorona) and Bronze (17353) (Colorona) and by BASF under the name Super Bronze (Cloisonne); orange nacres notably sold by BASF under the name Orange 363C (Cloisonne) and Orange MCR 101 (Cosmica) and by Merck under the name Passion Orange (Colorona) and Matte Orange (17449) (Microna); nacres of brown tint, notably sold by BASF under the name Nu-Antique Copper 340XB (Cloisonne) and Brown CE4509 (Chromalite); nacres with a copper tint, notably sold by BASF under the name Copper 340A (Timica); nacres with a red tint, notably sold by Merck under the name Sienna Fine (17386) (Colorona); nacres with a yellow tint, notably sold by BASF under the name Yellow (4502) (Chromalite); red-coloured nacres with a gold tint, sold notably by BASF under the name Sunstone GO 12 (Gemtone); pink nacres sold notably by BASF under the name Tan Opale G005 (Gemtone); black nacres with a gold tint, sold notably by BASF under the name Nu Antique Bronze 240 AB (Timica), blue nacres sold notably by Merck under the name Matte Blue (17433) (Microna), white nacres with a silvered tint, notably sold by Merck under the name Xirona Silver, and golden-green pink-orange nacres, notably sold by Merck under the name Indian Summmer (Xirona), and mixtures thereof.

[0145] Still as examples of nacres, mention may also be made of particles including a borosilicate substrate coated with titanium oxide.

[0146] Particles comprising a glass substrate coated with titanium oxide are notably sold under the name Metashine MC1080RY by Toyal.

[0147] Finally, examples of nacres that may also be mentioned include polyethylene terephthalate glitter flakes, notably those sold by Meadowbrook Inventions under the name Silver IP 0.004X0.004 (silvery glitter flakes). It is also possible to envisage multilayer pigments based on synthetic substrates, such as alumina, silica, calcium sodium borosilicate, calcium aluminium borosilicate and aluminium.

[0148] The special-effect pigments may also be chosen from reflective particles, i.e. notably from particles of which the size, structure and notably thickness of the layer(s) of which they are made and their physical and chemical nature, and surface condition, allow them to reflect incident light. This reflection may, where appropriate, have an intensity sufficient to create at the surface of the composition or of the mixture, when it is applied to the support to be made up, highlight points that are visible to the naked eye, i.e. more luminous points that contrast with their environment, making them appear to sparkle.

[0149] The reflective particles may be chosen so as not to significantly alter the dyeing effect generated by the dyeing agents with which they are combined, and more particularly so as to optimize this effect in terms of colour rendition. They may more particularly have a yellow, pink, red, bronze, orangey, brown, gold and / or coppery colour or tint.

[0150] These particles may have varied forms and may notably be in platelet or globular form, in particular in spherical form.

[0151] The reflective particles, whatever their form, may or may not have a multilayer structure and, in the case of a multilayer structure, may have, for example, at least one layer of uniform thickness, notably of a reflective material. When the reflective particles do not have a multilayer structure, they may be composed, for example, of metal oxides, notably titanium or iron oxides obtained synthetically.

[0152] When the reflective particles have a multilayer structure, they may include, for example, a natural or synthetic substrate, notably a synthetic substrate at least partially coated with at least one layer of a reflective material, notably of at least one metal or metallic material. The substrate may be made of one or more organic and / or mineral materials.

[0153] More particularly, it may be chosen from glasses, ceramics, graphite, metal oxides, aluminas, silicas, silicates, in particular aluminosilicates and borosilicates, and synthetic mica, and mixtures thereof, this list not being limiting.

[0154] The reflective material may include a layer of metal or of a metallic material.

[0155] Reflective particles are described especially in documents JP-A-09188830, JP-A-10158450, JP-A-10158541, JP-A-07258460 and JP-A-05017710.

[0156] Again as an example of reflective particles including a mineral substrate coated with a layer of metal, mention may also be made of particles including a silver- coated borosilicate substrate.

[0157] Particles with a silver-coated glass substrate, in the form of platelets, are sold under the name Microglass Metashine REFSX 2025 PS by Toyal. Particles with a glass substrate coated with a nickel / chromium / molybdenum alloy are sold under the names Crystal Star GF 550 and GF 2525 by this same company.

[0158] Use may also be made of particles comprising a metal substrate, such as silver, aluminium, iron, chromium, nickel, molybdenum, gold, copper, zinc, tin, magnesium, steel, bronze or titanium, said substrate being coated with at least one layer of at least one metal oxide, such as titanium oxide, aluminium oxide, iron oxide, cerium oxide, chromium oxide, silicon oxides, and mixtures thereof.

[0159] Examples that may be mentioned include aluminium powder, bronze powder or copper powder coated with SiOi, sold under the name Visionaire by Eckart.

[0160] Mention may also be made of interference pigments which are not attached to a substrate, such as liquid crystals (Helicones HC from Wacker) or interference holographic glitter flakes (Geometric Pigments or Spectra f / x from Spectratek). Special effect pigments also comprise fluorescent pigments, whether these are substances that are fluorescent in daylight or that produce an ultraviolet fluorescence, phosphorescent pigments, photochromic pigments, thermochromic pigments and quantum dots, sold, for example, by Quantum Dots Corporation. The variety of the pigments which can be used in the present invention makes it possible to obtain a rich palette of colours and also specific optical effects, such as metallic effects or interference effects.

[0161] The size of the pigment used in the composition according to the present invention is generally between 10 nm and 200 pm, preferably between 20 nm and 80 pm and more preferentially between 30 nm and 50 pm.

[0162] The pigments can be dispersed in the composition by virtue of a dispersant.

[0163] The dispersing agent serves to protect the dispersed particles from their agglomeration or flocculation. This dispersant can be a surfactant, an oligomer, a polymer or a mixture of several of them, carrying one or more functionalities having a strong affinity for the surface of the particles to be dispersed. In particular, they may become physically or chemically attached to the surface of the pigments. These dispersants also contain at least one functional group that is compatible with or soluble in the continuous medium. In particular, esters of 12-hydroxy stearic acid in particular and of Cs to C20 fatty acid and of polyols such as glycerol or diglycerol are used, such as poly( 12-hydroxy stearic acid) stearate with a molecular weight of approximately 750 g / mol, such as the product sold under the name Solsperse 21 000 by Avecia, polyglyceryl-2 dipolyhydroxystearate (CTFA name) sold under the reference Dehymyls PGPH by Henkel, or else polyhydroxystearic acid such as the product sold under the reference Arlacel Pl 00 by Uniqema, and mixtures thereof.

[0164] As other dispersants that may be used in the compositions of the invention, mention may be made of quaternary ammonium derivatives of polycondensed fatty acids, for instance Solsperse 17 000 sold by Avecia, and polydimethylsiloxane / oxypropylene mixtures such as those sold by Dow Coming under the references DC2-5185 and DC2-5225 C.

[0165] The pigments used in the composition may be surface-treated with an organic agent.

[0166] Thus, the pigments that have been surface-treated beforehand, which are useful in the context of the invention, are pigments that have totally or partially undergone a surface treatment of chemical, electronic, electrochemical, mechanochemical or mechanical nature, with an organic agent such as those described notably in Cosmetics and Toiletries, February 1990, volume 105, pages 53- 64, before being dispersed in the composition in accordance with the invention. These organic agents may be chosen, for example, from waxes, for example carnauba wax and beeswax; fatty acids, fatty alcohols and derivatives thereof, such as stearic acid, hydroxystearic acid, stearyl alcohol, hydroxystearyl alcohol and lauric acid and derivatives thereof; anionic surfactants; lecithins; sodium, potassium, magnesium, iron, titanium, zinc or aluminium salts of fatty acids, for example aluminium stearate or laurate; metal alkoxides; polyethylene; (meth)acrylic polymers, for example polymethyl methacrylates; polymers and copolymers containing acrylate units; alkanolamines; silicone compounds, for example silicones, in particular poly dimethylsiloxanes; organofluorine compounds, for example perfluoroalkyl ethers; fluorosilicone compounds.

[0167] The surface-treated pigments that are useful in the invention may also have been treated with a mixture of these compounds and / or may have undergone several surface treatments.

[0168] The surface-treated pigments that are useful in the context of the present invention may be prepared according to surface-treatment techniques that are well known to a person skilled in the art, or may be commercially available as is.

[0169] Preferably, the surface-treated pigments are coated with an organic layer.

[0170] The organic agent with which the pigments are treated may be deposited on the pigments by evaporation of solvent, chemical reaction between the molecules of the surface agent or creation of a covalent bond between the surface agent and the pigments.

[0171] The surface treatment may thus be performed, for example, by chemical reaction of a surface agent with the surface of the pigments and creation of a covalent bond between the surface agent and the pigments or the fillers. This method is notably described in Patent US 4 578 266.

[0172] An organic agent covalently bonded to the pigments will preferably be used.

[0173] The agent for the surface treatment may represent from 0.1% to 50% by weight relative to the total weight of the surface-treated pigment, preferably from 0.5% to 30% by weight and even more preferentially from 1% to 20% by weight relative to the total weight of the surface-treated pigment.

[0174] Preferably, the surface treatments of the pigments are chosen from the following treatments:

[0175] - a PEG- silicone treatment, for instance the AQ surface treatment sold by LCW;

[0176] - a methicone treatment, for instance the SI surface treatment sold by LCW;

[0177] - a dimethicone treatment, for instance the Covasil 3.05 surface treatment sold by LCW; - a dimethicone / trimethyl siloxysilicate treatment, for instance the Covasil 4.05 surface treatment sold by LCW;

[0178] - a magnesium myristate treatment, for instance the MM surface treatment sold by LCW;

[0179] - an aluminium dimyristate treatment, for instance the MI surface treatment sold by Miyoshi;

[0180] - a perfluoropolymethyl isopropyl ether treatment, for instance the FHC surface treatment sold by LCW;

[0181] - an isostearyl sebacate treatment, for instance the HS surface treatment sold by Miyoshi;

[0182] - a perfluoroalkyl phosphate treatment, for instance the PF surface treatment sold by Daito;

[0183] - an acrylate / dimethicone copolymer and perfluoroalkyl phosphate treatment, for instance the FSA surface treatment sold by Daito;

[0184] - a polymethylhydrogenosiloxane / perfluoroalkyl phosphate treatment, for instance the FS01 surface treatment sold by Daito;

[0185] - an acrylate / dimethicone copolymer treatment, for instance the ASC surface treatment sold by Daito;

[0186] - an isopropyl titanium triisostearate treatment, for instance the ITT surface treatment sold by Daito;

[0187] - an acrylate copolymer treatment, for instance the APD surface treatment sold by Daito;

[0188] - a perfluoroalkyl phosphate / isopropyl titanium triisostearate treatment, for instance the PF + ITT surface treatment sold by Daito.

[0189] Preferably, the dispersant is present with organic or inorganic pigments in submicron-sized particulate form.

[0190] The term “submicron-sized” or “submicronic” refers to pigments having a particle size that has been micronized by a micronization method and having a mean particle size of less than a micrometre (pm), in particular between 0.1 and 0.9 pm, and preferably between 0.2 and 0.6 pm.

[0191] Preferably, the dispersant and the pigment(s) are present in a (dispersant:pigment) amount, according to a weight ratio, of between 1: 4 and 4: 1, particularly between 1.5: 3.5 and 3.5: 1 or better still between 1.75: 3 and 3: 1. The dispersant(s) may therefore have a silicone backbone, such as silicone polyether and dispersants of amino silicone type. Among the suitable dispersants that may be mentioned are:

[0192] - amino silicones, i.e. silicones comprising one or more amino groups, such as those sold under the following names and references: BYK LPX 21879, by BYK, GP-4, GP-6, GP-344, GP-851, GP-965, GP-967 and GP-988-1, sold by Genesee Polymers,

[0193] - silicone acrylates such as Tego® RC 902, Tego® RC 922, Tego® RC 1041, and Tego® RC 1043, sold by Evonik,

[0194] - polydimethylsiloxane (PDMS) silicones bearing carboxyl groups such as X- 22162 and X-22370 by Shin-Etsu, epoxy silicones such as GP-29, GP-32, GP-502, GP-504, GP-514, GP-607, GP-682, and GP-695 by Genesee Polymers, or Tego® RC 1401, Tego® RC 1403, Tego® RC 1412 by Evonik.

[0195] Preferably, the dispersant(s) are of amino silicone type and are cationic.

[0196] Preferably, the pigment(s) are chosen from mineral, mixed mineral-organic or organic pigments.

[0197] In one variant of the invention, the pigment(s) are organic pigments, preferentially organic pigments surface-treated with an organic agent chosen from silicone compounds. In another variant of the invention, the pigment(s) are mineral pigments.

[0198] Preferably, the pigment(s) are chosen from zirconium oxides, zinc oxides, cerium oxides, iron oxides, titanium oxides, chromium oxides, manganese violet, ultramarine blue, ultramarine pink, chromium hydrate and ferric blue, and mixtures thereof; more preferentially, from titanium oxides, such as titanium dioxide, iron oxides, chromium oxides, in particular green chromium oxide, and mixtures thereof.

[0199] Even more preferentially, the pigment(s) are chosen from iron oxides, especially red, yellow and black iron oxides, titanium dioxide, and mixtures thereof.

[0200] Preferably, the total content of pigment(s) is within the range extending from 0.001% to 20% by weight, more preferentially from 0.01% to 15% by weight, even more preferentially from 0.1% to 10% by weight, better still from 3% to 10% by weight, even better still from 3% to 8% by weight, relative to the total weight of the composition (C). Preferably, the composition (C) does not contain any direct dye, nor any oxidation dye.

[0201] The term “direct dye” means natural and / or synthetic dyes, other than oxidation dyes. These are dyes which will spread superficially over the fibre. They may be ionic, for example cationic or anionic, or non-ionic.

[0202] Examples of suitable direct dyes that may be mentioned include azo direct dyes; (poly)methine dyes such as cyanines, hemicyanines and styryls; carbonyl dyes; azine dyes; nitro(hetero)aryl dyes; tri(hetero)arylmethane dyes; porphyrin dyes; phthalocyanine dyes and natural direct dyes, alone or in the form of mixtures.

[0203] (Poly)amine compound

[0204] Preferably, the composition (C) also comprises at least one (poly)amine compound.

[0205] The (poly)amine compound(s) used in the composition (C) may be chosen in particular from polyamine compounds bearing several primary amine and / or secondary amine groups or else from amino alkoxysilanes, and more particularly from amino alkoxysilane compounds, diamine compounds, triamine compounds, and mixtures thereof.

[0206] The (poly)amine compound(s) may be chosen from compounds comprising from 2 to 20 carbon atoms, notably non-polymeric compounds; they may be acyclic or cyclic, linear or branched, saturated or unsaturated, conjugated or non-conjugated, aromatic or non-aromatic, optionally interrupted with one or more heteroatoms or groups chosen from -O-, -S-, -Si(R’)2- and -N(R”)-, preferably -O-, -Si(R’)2-, or combinations thereof such as -Si(R’)2-O- or -O-Si(R’)2-, with R’, which may be identical or different, representing a (Ci-C4)alkyl group such as methyl, and R” representing a hydrogen atom or a (Ci-C4)alkyl group, preferably a hydrogen atom.

[0207] The term “non-polymeric compound” means a compound which is not directly obtained via a monomer polymerization reaction.

[0208] (Poly)amine compounds that may be mentioned in particular include N- methyl- 1 ,3-diaminopropane, N-propyl- 1 ,3-diaminopropane, N-isopropyl- 1,3- diaminopropane, N-cyclohexyl-l,3-diaminopropane, 2-(3- aminopropylaminojethanol, 3-(2-aminoethyl)aminopropylamine, bis(3- am i nopropyl Jam i nc, methylbis(3-aminopropyl)amine, N-(3-aminopropyl)- 1 ,4- diaminobutane, N,N-dimethyldipropylenetriamine, l,2-bis(3- am i nopropylam i nojcthanc, N,N’ -bis(3-aminopropyl)- 1 ,3-propanediamine, ethylenediamine, 1,3-propylenediamine, 1,4-butylenediamine, lysine, polylysine, cystamine, xylenediamine, tris(2-aminoethyl)amine, 1,3- bis(aminomethyl)cyclohexane, 1 ,4-bis(aminomethyl)cyclohexane, diaminopropanol such as l,3-diamino-2-propan-l-ol, 4,7,10-trioxa-l,13-tridecanediamine, spermidine, lysinol and C36-alkylenediamines (Priamine™ 1071, 1073, 1074, 1075, respectively, sold by Croda), preferably l,3-diamino-2-propan-l-ol, polylysine, spermidine and mixtures thereof.

[0209] According to a particular embodiment of the invention, the (poly)amine compound(s) are monoamine compounds, i.e. they contain only one primary and / or secondary amine group, preferably a primary amine group (NH2).

[0210] According to a particular embodiment of the invention, the (poly)amine compound(s) are diamine compounds, i.e. they contain two primary and / or secondary amine groups, preferably primary amine groups (NH2). An example of a diamine compound that may be mentioned is l,3-diamino-2-propan-l-ol.

[0211] According to a particular embodiment of the invention, the (poly)amine compound(s) are triamine compounds, i.e. they contain three primary and / or secondary amine groups. An example of a triamine compound that may be mentioned is spermidine.

[0212] According to a particular embodiment of the invention, the (poly)amine compound(s) are polyamine compounds, i.e. they contain more than two primary and / or secondary amine groups, preferably primary amine groups (NH2). An example of a (poly)amine compound that may be mentioned is polylysine.

[0213] The (poly)amine compound(s) may be chosen from amino alkoxy silanes, notably of formula R Si(OR )z(R’3)x in which:

[0214] - RT is a linear or branched, saturated or unsaturated, cyclic or acyclic Ci-Ce hydrocarbon chain substituted with a group chosen from primary amine groups NH2 or secondary amine groups -N(H)R with R representing a C1-C4 alkyl, an aryl or a benzyl substituted with an amino group or with a C1-C4 aminoalkyl group; RT may be interrupted in its chain with a heteroatom (O, S, NH) or a carbonyl group (CO), R’ 1 being linked to the silicon atom directly via a carbon atom,

[0215] - R and R’3, which may be identical or different, represent a linear or branched (Ci- Cejalkyl group,

[0216] - z denotes an integer ranging from 1 to 3, and - x denotes an integer ranging from 0 to 2, with z + x = 3.

[0217] In particular, R’ i is an acyclic chain. Preferably, R’ i is a linear or branched, saturated or unsaturated Ci-Ce hydrocarbon chain substituted with an amine -Nth or -N(H)R group, with R representing a Ci-Ce alkyl, a C3-C6 cycloalkyl or a Ce aromatic group. More preferentially, R’i is a saturated linear Ci-Ce hydrocarbon chain substituted with an amine group Nth. Even more preferentially, R’i is a saturated linear C2-C4 hydrocarbon chain substituted with an amine group Nth.

[0218] In particular, R’2 represents an alkyl group comprising from 1 to 4 carbon atoms; preferably, R’2 represents a linear alkyl group comprising from 1 to 4 carbon atoms and more preferentially R’2 represents an ethyl group.

[0219] In particular, R’3 represents an alkyl group comprising from 1 to 4 carbon atoms; preferably, R’3 represents a linear alkyl group comprising from 1 to 4 carbon atoms and more preferentially R’3 represents methyl or ethyl groups. Preferably, z is equal to 3.

[0220] In particular, the (poly)amine compound(s) are chosen from amino alkoxysilanes including only one primary and / or secondary, preferably primary (Nth), amine group, such as 3-aminopropyltriethoxysilane (APTES), 3- aminoethyltriethoxysilane (AETES), 3-aminopropylmethyldiethoxysilane, N-(2- aminoethyl)-3-aminopropyltriethoxysilane, 3-(m- aminophenoxy)propyltrimethoxysilane, p-aminophenyltrimethoxysilane, and N-(2- aminoethylaminomethyl)phenethyltrimethoxysilane.

[0221] Preferably, the (poly)amine compound(s) are chosen from 3- aminopropyltriethoxysilane (APTES), 3-aminoethyltriethoxysilane (AETES), 3- aminopropylmethyldiethoxysilane, and N-(2-aminoethyl)-3- aminopropyltriethoxysilane, and more preferentially 3-aminopropyltriethoxysilane (APTES), in particular the product sold by Sigma- Aldrich.

[0222] The (poly)amine compound(s) may also be chosen from amino polymers, notably having a weight- average molecular weight ranging from 500 g.mot1to 1 000 000 g.mot1, preferably ranging from 500 g.mot1to 500 000 g.mot1, and preferentially ranging from 500 g.mot1to 100000 g.mot1.

[0223] According to a particular embodiment of the invention, the (poly)amine compound(s) are monoamine compounds and are chosen from polydialkylsiloxanes notably of formula (IV):

[0224] H2N-ALK-Si(R’2)(R’3)-O-[ Si(R’2)(R’3)-O]n- Si(R’2)(R’3)-R’4 (IV) in which formula (IV):

[0225] - ALK represents a linear or branched, preferably linear, (Ci -Chalky lene group such as propylene,

[0226] - R’2 and R’3, which may be identical or different, preferably identical, represent a (Ci-C4)alkyl group such as methyl, and

[0227] - R’4 represents a linear or branched (Ci-C6)alkyl group, preferably a C4 group such as n-butyl, n represents an integer greater than or equal to 2; preferably, the value of n is such that the weight- average molecular weight of the polydimethylsiloxane ranges from 500 to 3000 g.mol’1. As examples of poly dimethylsiloxanes (IV), mention may be made of the products sold under the names MCR-A11 and MCR- A12 by Gelest.

[0228] According to a particular embodiment of the invention, the (poly)amine compound(s) are diamine compounds, i.e. they contain two primary and / or secondary amine groups, preferably primary amine groups (NH2).

[0229] More particularly, they are chosen from the compounds of formula (V) or (VI):

[0230] ■ ALK[(O-ALK’)m-NH2]2 (V) or

[0231] ■ H2N-ALK-Si(R’)2-[O-Si(R’)2]m-O-Si(R)2-ALK’-NH2 (VI) in which formulae (V) and (VI):

[0232] - ALK and ALK’ , which may be identical or different, represent a linear or branched, preferably linear, (Ci-C6)alkylene group, such as propylene,

[0233] - R’, which may be identical or different, represents a (Ci-C4)alkyl group, such as methyl,

[0234] - m represents an integer greater than or equal to 0; preferably, the value of m is such that the weight-average molecular weight of compound (V) or (VI) ranges from 500 g.mor1to 55 000 g.mol’1.

[0235] As examples of compounds of formula (VI), mention may be made of those sold under the names DMS-A11, DMS-A12, DMS-A15, DMS-A21, DMS-A31, DMS-A32 and DMS-A35 by Gelest.

[0236] The (poly)amine compound(s) that are diamines are particularly polyether diamines notably of formula H2N-ALK-O-[ALK’-O]m-ALK”-NH2 with ALK, ALK’ and ALK”, which may be identical or different, representing a linear or branched (Ci- C6)alkylene group, and m representing an integer greater than or equal to 0, such as 4,7,10-trioxa-l,13-tridecanediamine or the compounds known under the reference Jeffamine from Hunstman, and more particularly a,co-diamino polyethylene glycol and / or polypropylene glycol (with an amine function at the end of the chain) such as the products sold under the names Jeffamine D-230, D-400, D-2000, D-4000, ED- 600, ED-9000 and ED-2003.

[0237] According to a particular embodiment of the invention, the (poly)amine compound(s) are triamine compounds, i.e. they contain three primary and / or secondary amine groups, preferably primary amine groups (NH2). More particularly, they are chosen from polyether triamines notably of formula ALK”’[(O-ALK’)m- NH21 ? with ALK’ as defined previously and ALK’ ’ ’ representing a linear or branched bivalent (Ci-Cejalkylcnc group, and m representing an integer greater than or equal to 0.

[0238] As (poly)amine compounds which are triamine compounds, polyether triamines are mentioned in particular, such as those sold under the name Jeffamine T- 403.

[0239] According to another particular embodiment of the invention, the (poly) amine compound(s) include more than three primary and / or secondary amine groups, preferably primary amine groups (NH2).

[0240] In this variant, the (poly)amine compound(s) are chosen in particular from poly(meth)acrylates or poly(meth)acrylamides bearing primary or secondary amine side functions, such as poly(3-aminopropyl)methacrylamide and poly (2- aminoethyl) methacrylate.

[0241] Preferably, the (poly)amine compounds are chosen from chitosans (notably poly(D-glucosamine)s) and polydimethylsiloxanes comprising primary amine groups at the end of the chain and / or on side chains.

[0242] According to this variant, the (poly)amine compound(s) are chosen in particular from poly((C2-C5)alkyleneimines), and preferably polyethyleneimines and polypropyleneimines, notably poly (ethyleneimine), in particular the product sold under the reference 408700 by Aldrich Chemical or under the trade name Lupasol by BASF, notably with a molecular weight of between 1200 and 25 000; poly (allylamine), in particular the product sold under the reference 479136 by Aldrich Chemical; polyvinylamines and copolymers thereof, notably with vinylamides, in particular vinylamine / vinylformamide copolymers such as those sold under the name Lupamin® 9030 by BASF; polyamino acids containing NH2 groups, such as polylysine, in particular the product sold by JNC Corporation (formerly Chisso); amino dextran, in particular the product sold by CarboMer Inc; amino polyvinyl alcohol, in particular the product sold by CarboMer Inc; acrylamido(Ci- C6)alkylamine-based copolymers, notably acrylamidopropylamine-based copolymers; and poly(D-glucosamine), for example sold under the reference Kionutrime CSG® by Kytozyme.

[0243] According to a particular embodiment, the polydimethylsiloxanes comprising primary amine groups at the end of the chain and / or on side chains are chosen from the compounds of formula (VII) below: Ra-Si(Rb)(Rc)-O-[Si(Rb)(Rc)-O]m-[Si(ALK1-NH2)(Ra)-O]n-Si(Rb)(Rc)-Ra(VII) in which formula (VII):

[0244] - Ra, which may be identical or different, represents a hydroxyl or (Ci-C4)alkyl group,

[0245] - Rb and Rc, which may be identical or different, preferably identical, represent a (Ci- C4)alkyl group such as methyl, - ALK1represents a linear or branched (Ci- C6)alkylene group, optionally interrupted with an N(H) group, - m and n are integers greater than or equal to 1; preferably, m and n are such that the weight-average molecular mass of the compound of formula (VII) ranges from 1000 g.mor1to 500000 g.mor1.

[0246] According to a preferred variant, formula (VII) is such that Ra, Rb and Rcrepresent a methyl group, ALK1represents a propylene group, and the values of n and m are such that the weight- average molecular weight of the polydimethylsiloxane ranges from 1000 g.mor1to 55 000 g.mor1.

[0247] As examples of polydimethylsiloxanes of formula (VII), mention may be made of those sold under the names AMS-132, AMS-152, AMS-162, AMS-163, AMS-191 and AMS-1203 by Gelest.

[0248] According to another variant, formula (VII) is such that Rarepresents a hydroxyl or (Ci-C4)alkyl group, such as methyl, ALK1represents a (C5-C6)alkylene group substituted with an NH group; preferably, ALK1represents -(CH2)3-N(H)- (CH2)2-, and m and n are such that the weight- average molecular mass of the compound of formula (VI) ranges from 5000 g.mor1to 500000 g.mor1.

[0249] As amine polymer, mention may also be made of a,co-diamino polytetrahydrofurans (or polytetramethylene glycols) and a,co-diamino polybutadienes.

[0250] According to a particular embodiment of the invention, the (poly)amine compounds are chosen from hyperbranched polymers comprising at least one amino group and dendrimers bearing at least one amino group, such as PAM AM polyamidoamine dendrimers with an ethylenediamine core and a terminal amine function.

[0251] Preferably, the (poly)amine compound(s) are chosen from: a) (poly)amine compounds including more than three primary and / or secondary amine groups, preferably primary amine groups (NH2); in particular, chitosans such as poly(D- glucosamine) and polylysine, b) polyether diamines, in particular a,co-diamino polyethylene glycols, bearing a chain-end amine function, c) poly ether triamines such as Jeffamine T-403, d) aminoalkoxy silanes, in particular APTES, e) polyamine compounds NHi-alk-NHi, in which alk denotes a divalent C2-C20 hydrocarbon chain, optionally substituted with a hydroxyl group (-OH) and / or optionally interrupted with one or more heteroatoms chosen from -O-, -N(R)- with R denoting a hydrogen atom or a C1-C4 alkyl radical, notably spermidine, 4,7,10-trioxa- 1,13-tridecanediamine, l,3-diamino-2-propan-l-ol and lysinol, f) polydialkylsiloxanes comprising primary amine groups at the end of the chain or on side chains, in particular polydimethylsiloxanes comprising primary amine groups, more particularly bis(3-aminopropyl)-terminated poly(dimethoxysiloxane) (PDMS- diNth) and amodimethicones comprising amine groups on side chains, even more particularly bis-cetearyl amodimethicone; and mixtures thereof.

[0252] More preferably, the (poly)amine compound(s) are chosen from c) and d), and mixtures thereof.

[0253] Even more preferably, the (poly)amine compound(s) are chosen from polyether triamines, such as Jeffamine T-403, aminoalkoxy silanes, in particular APTES, and mixtures thereof.

[0254] Preferably, the total content of (poly)amine compound(s), when present in the composition (C), is within the range extending from 0.1% to 40% by weight, preferentially from 0.5% to 35% by weight, more preferentially from 1% to 30% by weight, even more preferentially from 5% to 20% by weight, relative to the total weight of the composition (C).

[0255] Preferably, the total content of (poly)amine compound(s) chosen from aminoalkoxy silanes and poly ether triamines, and mixtures thereof, when present in the composition (C), is within the range extending from 0.1% to 40% by weight, preferentially from 0.5% to 35% by weight, more preferentially from 1% to 30% by weight, even more preferentially from 5% to 20% by weight, relative to the total weight of the composition (C).

[0256] Organic solvent

[0257] The composition (C) may optionally also comprise one or more organic solvents.

[0258] As organic solvents, mention may for example be made of a) C2-C6 alkanols, such as ethanol and isopropanol; b) polyols that are water-miscible at ambient temperature (25 °C), in particular chosen from polyols notably containing from 2 to 10 carbon atoms, preferably containing from 2 to 6 carbon atoms, such as glycerol, propylene glycol, 1,3-propanediol, butylene glycol, pentylene glycol, hexylene glycol, dipropylene glycol, diethylene glycol or diglycerol; c) polyol ethers such as 2-butoxyethanol, propylene glycol monomethyl ether, diethylene glycol monoethyl ether and diethylene glycol monomethyl ether, and also d) aromatic alcohols, such as benzyl alcohol or phenoxyethanol, and mixtures thereof.

[0259] According to the invention, the organic solvents do not bear any amine or thiol functions and are in particular different from aminoalkanols such as diaminopropanols .

[0260] Preferably, the organic solvent(s) are chosen from polyols, preferably from polyols having from 2 to 10 carbon atoms, more preferentially having from 2 to 6 carbon atoms, such as ethanol or glycerol.

[0261] Advantageously, the composition (C) is an aqueous or aqueous alcohol composition (advantageously an ethanol / water mixture, in particular one with a volume ratio of between 1 / 99 and 99 / 1, more particularly between 10 / 90 and 90 / 10, even more particularly between 20 / 80 and 80 / 20, preferably 40 / 60 and 60 / 40, such as 50 / 50).

[0262] Preferably, the total content of organic solvent(s) in the composition (C) is within the range extending from 1% to 90% by weight, more preferentially from 10% to 70% by weight, even more preferentially from 20% to 55% by weight, and better still from 25% to 45% by weight, relative to the total weight of the composition (C).

[0263] Preferably, the composition (C) also comprises water. Preferably, the total content of water in the composition (C) is within the range extending from 1% to 90% by weight, more preferentially from 10% to 70% by weight, even more preferentially from 20% to 55% by weight, and better still from 25% to 45% by weight, relative to the total weight of the composition (C).

[0264] Preferably, when the composition (C) comprises water, the pH of this composition is between 5 and 12, more preferentially between 5 and 9, even more preferentially between 6 and 8, and better still between 6.5 and 7.5.

[0265] The pH may be adjusted to the desired value with the aid of basifying agents or acidifying agents in common use.

[0266] Examples of acidifying agents that may be mentioned include mineral or organic acids, for instance hydrochloric acid or orthophosphoric acid, carboxylic acids, for instance acetic acid, tartaric acid, citric acid, lactic acid, and sulfonic acids.

[0267] Among basifying agents, mention may be made of aqueous ammonia and mineral or organic hydroxides.

[0268] The composition (C) may also contain additives commonly used in cosmetics, for example antifoams, thickening agents, moisturizers, clays, mineral fillers, UV screening agents, fragrances, anionic, cationic, non-ionic or amphoteric surfactants, vitamins, preservatives, silicones, waxes, and mixtures thereof. These additives may be present in the composition according to the invention in an amount ranging from 0 to 20% by weight, relative to the total weight of the composition (C).

[0269] A person skilled in the art will take care to select these optional additives and the amounts thereof such that they do not adversely affect the properties of the compositions of the present invention.

[0270] The composition (C) may be used on wet or dry hair, in rinse-out or leave- on mode.

[0271] The composition (C) may optionally be formulated in the form of a suspension, a dispersion, a gel, an emulsion, especially an oil-in-water (O / W) or water-in-oil (W / O) emulsion, or a multiple emulsion (W / O / W or polyol / O / W or O / W / O), in the form of a cream, a mousse, a stick, a dispersion of vesicles, especially of ionic or non-ionic lipids, or a two-phase or multi-phase lotion. During step b) of the process of the invention, an aqueous composition (D) as described below is applied to the keratin fibres previously dyed via step a) of the process according to the invention.

[0272] Composition (D)

[0273] The composition (D) is applied to keratin fibres artificially dyed beforehand by means of the composition (C) as described above.

[0274] The composition (D) according to the invention comprises water and at least one acidic agent chosen from organic acids and mineral acids, and mixtures thereof.

[0275] For the purposes of the present invention, the acidic agents are water soluble.

[0276] For the purposes of the present invention, the term “water-soluble acidic agent” means an acidic agent which has a solubility in water at ordinary ambient temperature (25°C) and at atmospheric pressure (1.013 x 105Pa) of greater than 0.1% by weight (in grams of water-soluble acidic agent per 100 ml of water), preferably greater than 0.5% by weight (in grams of water-soluble acidic agent per 100 ml of water).

[0277] In other words, the water-soluble acidic agent(s) have a solubility in water of at least 1 g per litre of water, preferably at least 5 g per litre of water.

[0278] The acidic agent(s) that can be used in the composition (D) preferably comprise between 2 and 30 carbon atoms, more preferentially between 2 and 24 carbon atoms, even more preferentially between 2 and 20 carbon atoms.

[0279] Preferably, the acidic agent(s) that may be used in the composition (D) according to the invention are non-polymeric, i.e. different from the polymers comprising at least one carboxylic acid function.

[0280] The acidic agent(s) that may be used in the composition (D) according to the invention are not silicones.

[0281] By way of example, the organic acids may be chosen from phytic acid, maleic acid, fumaric acid, benzilic acid, retinoic acid, l,4-benzene-di(3-methylidene- 10-camphorsulfonic) acid, thioglycolic acid, thiolactic acid, hydroxy acids such as ascorbic acid, kojic acid, citric acid, caffeic acid, salicylic acid (or even its derivatives), lactic acid, methyl lactic acid, mandelic acid, glucuronic acid, glycolic acid, 2-hydroxybutanoic acid, 2-hydroxypentanoic acid, 2-hydroxyhexanoic acid, 2- hydroxyheptanoic acid, 2-hydroxyoctanoic acid, phenyllactic acid, gluconic acid, galacturonic acid, aleuritic acid, ribonic acid, tartronic acid, tartaric acid, malic acid, and mixtures thereof.

[0282] Preferably, the organic acids are chosen from phytic acid, maleic acid, fumaric acid, benzilic acid, retinoic acid, l,4-benzene-di(3-methylidene-10- camphorsulfonic) acid, thioglycolic acid, thiolactic acid, hydroxy acids such as ascorbic acid, kojic acid, citric acid, caffeic acid, salicylic acid (or even its derivatives), lactic acid, methyl lactic acid, mandelic acid, glucuronic acid, glycolic acid, 2-hydroxybutanoic acid, 2-hydroxypentanoic acid, 2-hydroxyhexanoic acid, 2- hydroxyheptanoic acid, 2-hydroxyoctanoic acid, phenyllactic acid, gluconic acid, galacturonic acid, aleuritic acid, ribonic acid, tartronic acid, tartaric acid, malic acid, and mixtures thereof.

[0283] More preferentially, the organic acids are chosen from phytic acid, maleic acid, fumaric acid, benzilic acid, retinoic acid, 1, 4-benzene-di(3 -methylidene- 10- camphorsulfonic) acid, thioglycolic acid, thiolactic acid, hydroxy acids such as ascorbic acid, kojic acid, citric acid, caffeic acid, salicylic acid, lactic acid, methyl lactic acid, mandelic acid, glucuronic acid, glycolic acid, 2-hydroxybutanoic acid, 2- hydroxypentanoic acid, 2-hydroxyhexanoic acid, 2-hydroxyheptanoic acid, 2- hydroxyoctanoic acid, phenyllactic acid, gluconic acid, galacturonic acid, aleuritic acid, ribonic acid, tartronic acid, tartaric acid, malic acid, and mixtures thereof.

[0284] Even more preferentially the organic acids are chosen from hydroxy acids, in particular alpha-hydroxy acids, maleic acid, phytic acid, and mixtures thereof.

[0285] Better still, the organic acids are chosen from lactic acid, citric acid, glycolic acid, maleic acid, phytic acid, and mixtures thereof.

[0286] For the purposes of the invention, the term "alpha-hydroxy acids" or "a- hydroxy acids" or "AHA" (" a-hydroxy carboxylic acids”) means carboxylic acids bearing a hydroxyl group -OH on the carbon of the chain which immediately follows the carbon bearing the carboxylic acid group (i.e. "a" carbon). The "alphahydroxy acid" compounds generally comprise from 2 to 12 carbon atoms and preferably from 2 to 8 carbon atoms. Their general formula may be RIR 2-C(OH)- COOH, where R1 and R2, independently of one another, which may be identical or different, represent a hydrogen atom or a Ci-Cio alkyl radical optionally substituted with one or more carboxylic acid groups.

[0287] For the purposes of the invention, a mineral acid is a compound formed from hydrogen and one or more other elements (with the exception of carbon), which dissociates or decomposes to give hydrogen ions by dissolution in water or in other solvents.

[0288] By way of example, mention may be made, among mineral acids, of hydrochloric acid, phosphoric acid, phosphorous acid, sulfuric acid, nitric acid, chloro sulfuric acid, fluoro sulfuric acid, silicic acid and sulfamic acid.

[0289] Preferably, the mineral acids are chosen from hydrochloric acid, phosphoric acid, phosphorous acid, sulfuric acid, and mixtures thereof, more preferentially from hydrochloric acid.

[0290] Preferably, the acidic agent(s) are chosen from organic acids.

[0291] More preferentially, the acidic agent(s) are chosen from lactic acid, citric acid, glycolic acid, maleic acid, phytic acid, propionic acid, hydrochloric acid, and mixtures thereof.

[0292] Even more preferentially, the acidic agent(s) are chosen from lactic acid, citric acid, glycolic acid, maleic acid, phytic acid, and mixtures thereof.

[0293] Preferably, the total content of acidic agent(s) in the composition (D) is within the range extending from 0.001% to 30% by weight, more preferentially from 0.01% to 25% by weight, even more preferentially from 0.05% to 20% by weight, better still from 0.1% to 20% by weight, even better still from 0.2% to 20% by weight, relative to the total weight of the composition (D).

[0294] Preferably, when it (they) is (are) present, the total content of organic acid(s) in the composition (D) is within the range extending from 0.05% to 30% by weight, more preferentially from 0.1% to 25% by weight, even more preferentially from 1% to 22% by weight, better still from 1% to 20% by weight, even better still from 3% to 20% by weight, relative to the total weight of the composition (D).

[0295] Preferably, when it (they) is (are) present, the total content of mineral acid(s) in the composition (D) is within the range extending from 0.001% to 10% by weight, more preferentially from 0.005% to 7% by weight, even more preferentially from 0.01% to 5% by weight, better still from 0.05% to 4% by weight, even better still from 0.05% to 1% by weight, even better still from 0.06% to 0.5% by weight, relative to the total weight of the composition (D).

[0296] The pH of the aqueous composition (D) according to the invention is acidic, i.e. below 7 and preferably below 5.

[0297] Preferably, the pH of the aqueous composition (D) is between 0.8 and 4, preferentially between 1 and 3.75 and more preferentially between 1.75 and 3.5.

[0298] If necessary, one or more customarily used basifying agents may be added to the composition (D) to adjust the pH to the desired value.

[0299] Among the customarily used basifying agents, mention may be made of aqueous ammonia and mineral or organic hydroxides.

[0300] Preferably, the total content of water in the composition (D) ranges from 20% to 99.999% by weight, more preferentially from 50% to 99.9% by weight, even more preferentially from 70% to 99.8% by weight, and better still from 85% to 99.8% by weight, relative to the total weight of the composition (D).

[0301] According to a particular embodiment of the invention, the composition (D) according to the invention is devoid of sulfate anionic surfactant.

[0302] The expression “devoid of sulfate anionic surfactant” means that the composition (D) does not comprise any sulfate anionic surfactants (0% by weight), or that the sulfate anionic surfactant(s) present in the composition (D) are included in a total content of less than or equal to 0.1% by weight, preferably less than or equal to 0.05% by weight, more preferentially less than or equal to 0.01% by weight, relative to the total weight of the composition (D). Even more preferentially, the composition (D) is free of sulfate anionic surfactant (0% by weight).

[0303] The composition (D) may also contain additives commonly used in cosmetics, for example antifoams, thickening agents, moisturizers, clays, mineral fillers, UV screening agents, fragrances, cationic, non-ionic or amphoteric surfactants, vitamins, preservatives, silicones, waxes, and mixtures thereof. These additives may be present in the composition according to the invention in an amount ranging from 0% to 20% by weight, relative to the total weight of the composition (D).

[0304] A person skilled in the art will take care to select these optional additives and the amounts thereof such that they do not adversely affect the properties of the compositions of the present invention.

[0305] The composition (D) may optionally be formulated in the form of a suspension, a dispersion, a gel, an emulsion, especially an oil-in-water (O / W) or water-in-oil (W / O) emulsion, or a multiple emulsion (W / O / W or polyol / O / W or O / W / O), in the form of a cream, a mousse, a dispersion of vesicles, especially of ionic or non-ionic lipids, or a two-phase or multi-phase lotion. Preferably, the composition (D) is in the form of a gel or a cream.

[0306] During step c) of the process of the invention, a washing composition comprising at least one surfactant is applied to the keratin fibres from which the makeup was removed beforehand by means of the composition (D) as described previously.

[0307] Step c) of applying to the keratin fibres a washing composition as described below is necessary in order to obtain good bleaching of said keratin fibres.

[0308] Washing composition:

[0309] The process according to the invention comprises a step c) of applying to the keratin fibres a washing composition comprising at least one surfactant.

[0310] Preferably, the washing composition comprises at least one anionic surfactant.

[0311] The washing composition is different from the composition (C) and from the composition (D) as described previously.

[0312] More preferentially, the washing composition according to the invention comprises at least one anionic surfactant and at least one amphoteric or zwitterionic surfactant.

[0313] The washing composition may comprise one or more anionic surfactants. The term “anionic surfactant” means a preferably non-silicone surfactant including, as ionic or ionizable groups, only anionic groups.

[0314] In the present description, a species is described as being “anionic” when it bears at least one permanent negative charge or when it can be ionized to a negatively charged species, under the conditions of use of the composition of the invention (for example the medium or the pH) and not comprising any cationic charge.

[0315] The anionic surfactants may be chosen from sulfate, sulfonate and carboxylic (or carboxylate) surfactants. Of course, a mixture of these surfactants may be used.

[0316] It is understood in the present description that:

[0317] - the carboxylate anionic surfactants comprise at least one carboxylic or carboxylate function (-COOH or -COO") and do not comprise any sulfate and / or sulfonate functions;

[0318] - the sulfonate anionic surfactants comprise at least one sulfonate function (-SO3H or -SO3’), and may optionally also comprise one or more carboxylate functions, but do not comprise any sulfate functions; and

[0319] - the sulfate anionic surfactants comprise at least one sulfate function but do not comprise any carboxylate or sulfonate functions.

[0320] The carboxylate anionic surfactants that may be used thus include at least one carboxylic or carboxylate function (-COOH or -COO ).

[0321] The carboxylate anionic surfactants may be chosen from the following compounds: acyl glycinates, acyl lactylates, acyl sarcosinates, acyl glutamates; alkyl- D-galactosideuronic acids, alkyl ether carboxylic acids, alkyl(C6-C3o aryl) ether carboxylic acids, alkylamido ether carboxylic acids; and also the salts of these compounds; and mixtures thereof; the alkyl and / or acyl groups of these compounds comprising from 6 to 30 carbon atoms, notably from 12 to 28, even better still from 14 to 24 or even from 16 to 22 carbon atoms; the aryl group preferably denoting a phenyl or benzyl group; it being possible for these compounds to be polyoxyalkylenated, notably polyoxyethylenated, and then preferably comprising from 1 to 50 ethylene oxide units, better still from 2 to 10 ethylene oxide units.

[0322] Use may also be made of C6-C24 alkyl monoesters of polyglycosidepolycarboxylic acids such as C6-C24 alkyl polyglycoside-citrates, C6-C24 alkyl polyglycoside-tartrates and C6-C24 alkyl polyglycoside-sulfosuccinates, and salts thereof. Preferentially, the carboxylate anionic surfactants are chosen, alone or as a mixture, from:

[0323] - acyl glutamates, notably C6-C24 or even C12-C20 acyl glutamates, such as stearoyl glutamates, and in particular disodium stearoyl glutamate;

[0324] - acyl sarcosinates, notably C6-C24 or even C12-C20 acyl sarcosinates, such as palmitoyl sarcosinates, and in particular sodium palmitoyl sarcosinate;

[0325] - acyl lactylates, notably C12-C28 or even C14-C24 acyl lactylates, such as behenoyl lactylates, and in particular sodium behenoyl lactylate;

[0326] - C6-C24 and notably C12-C20 acyl glycinates;

[0327] - (Ce-C24)alkyl ether carboxylates, and notably (Ci2-C2o)alkyl ether carboxylates;

[0328] - polyoxyalkylenated (C6-C24)alkyl(amido) ether carboxylic acids, in particular those comprising from 2 to 50 ethylene oxide groups; in particular in the form of alkali metal or alkaline-earth metal salts, ammonium salts or aminoalcohol salts.

[0329] Surfactants of the sarcosinate type may notably be chosen from (C6-C3o)acyl sarcosinates of formula (I) below: R-C(O)-N(CH3)-CH2-C(O)-OX (I) with

[0330] - X denoting a hydrogen atom, an ammonium ion, an ion derived from an alkali metal or an alkaline-earth metal or an ion derived from an organic amine, preferably a hydrogen atom, and

[0331] - R denoting a linear or branched alkyl group of 5 to 29 carbon atoms.

[0332] R preferably denotes a linear or branched alkyl group of 8 to 24 carbon atoms, preferably of 12 to 20 carbon atoms.

[0333] Among the (C6-C3o)acyl sarcosinates of formula (I) that may be used in the present composition, mention may be made of palmitoyl sarcosinates, stearoyl sarcosinates, myristoyl sarcosinates, lauroyl sarcosinates and cocoyl sarcosinates, in acid form or in salified form.

[0334] The anionic surfactant(s) of sarcosinate type are advantageously chosen from sodium lauroyl sarcosinate, stearoylsarcosine, myristoylsarcosine, and mixtures thereof, preferably from stearoylsarcosine, myristoylsarcosine, and mixtures thereof.

[0335] Among the above carboxylic surfactants, mention may also be made of polyoxyalkylenated alkyl(amido) ether carboxylic acids and salts thereof, in particular those including from 2 to 50 alkylene oxide and in particular ethylene oxide groups, such as the compounds sold by Kao under the Akypo names. The polyoxyalkylenated alkyl(amido) ether carboxylic acids that may be used are preferably chosen from those of formula (II):

[0336] Rl-(OC2H4)n-OCH2COOA (II) in which:

[0337] - R1 represents a linear or branched C6-C24 alkyl or alkenyl radical, a (Cs- C9)alkylphenyl radical, a radical R2CONH-CH2-CH2- with R2 denoting a linear or branched C9-C21 alkyl or alkenyl radical; preferably, R1 is a Cx-C2o and preferably Cs-Cis alkyl radical, and “aryl” preferably denotes phenyl,

[0338] - n is an integer or decimal (mean value) ranging from 2 to 24, preferably from 2 to 10,

[0339] - A denotes H, ammonium, Na, K, Li, Mg or a monoethanolamine or triethanolamine residue.

[0340] Use may also be made of mixtures of compounds of formula (II), in particular of mixtures of compounds having different R1 groups.

[0341] The polyoxyalkylenated alkyl(amido) ether carboxylic acids that are preferred are those of formula (II) in which:

[0342] - R1 denotes a C12-C14 alkyl, cocoyl, oleyl, nonylphenyl or octylphenyl radical,

[0343] - A denotes a hydrogen or sodium atom, and

[0344] - n ranges from 2 to 20, preferably 2 to 10.

[0345] Even more preferentially, R1 denotes a C12 alkyl radical, A denotes a hydrogen or sodium atom and n ranges from 2 to 10.

[0346] The sulfonate anionic surfactants capable of being used comprise at least one sulfonate (-SO3H or -SO3 function.

[0347] The sulfonate anionic surfactants may be chosen from the following compounds: alkylsulfonates, alkylamidesulfonates, alkylarylsulfonates, alpha-olefin sulfonates, paraffin sulfonates, alkyl sulfosuccinates, alkyl ether sulfosuccinates, alkylamide sulfosuccinates, alkylsulfoacetates, N-acyltaurates, acylisethionates, alkylsulfolaurates, and also the salts of these compounds; the alkyl groups of these compounds comprising from 6 to 30 carbon atoms, notably from 12 to 28, better still from 14 to 24, or even from 16 to 22 carbon atoms; the aryl group preferably denoting a phenyl or benzyl group; these compounds possibly being polyoxyalkylenated, notably polyoxyethylenated, and then preferably comprising from 1 to 50 ethylene oxide units, better still from 2 to 10 ethylene oxide units. Preferentially, the sulfonate anionic surfactants are chosen, alone or as a mixture, from:

[0348] - C6-C24 and notably C12-C20 alkyl sulfosuccinates, notably lauryl sulfosuccinates;

[0349] - C6-C24, notably C12-C20, alkyl ether sulfosuccinates;

[0350] - C6-C24, notably C12-C20, N-acyltaurates;

[0351] - (C6-C24)acylisethionates, preferably (C12-C18) acylisethionates, in particular in the form of alkali metal or alkaline-earth metal salts, ammonium salts or aminoalcohol salts.

[0352] Preferably, the anionic surfactant(s) of sulfonate type are chosen from C6-C24 and notably C12-C20 N-acyltaurates, and in particular N-acyl N-methyltaurates, C6-C24 and notably C12-C18 acylisethionates, and also salts thereof and mixtures thereof.

[0353] More preferentially, the anionic surfactant(s) of sulfonate type are chosen from C6-C24 and notably C12-C18 acylisethionates, and also salts thereof and mixtures thereof.

[0354] The sulfate anionic surfactants that may be used comprise at least one sulfate function (-OSO3H or -OSCh')-

[0355] The sulfate anionic surfactants may be chosen from the following compounds: alkyl sulfates, alkyl ether sulfates, alkylamido ether sulfates, alkylaryl polyether sulfates, monoglyceride sulfates; and the salts of these compounds; the alkyl groups of these compounds comprising from 6 to 30 carbon atoms, notably from 8 to 28, even better still from 10 to 24 or even from 12 to 22 carbon atoms; the aryl group preferably denoting a phenyl or benzyl group; it being possible for these compounds to be (poly)oxyalkylenated, notably (poly)oxyethylenated, and then preferably comprising from 1 to 50 ethylene oxide units, better still from 1 to 10 ethylene oxide units.

[0356] Preferentially, the sulfate anionic surfactants are chosen, alone or as a mixture, from:

[0357] - alkyl sulfates, notably C10-C24, or even C12-C22 alkyl sulfates;

[0358] - alkyl ether sulfates, notably C10-C24, or even C12-C22 alkyl ether sulfates, preferably comprising from 1 to 20 ethylene oxide units; in particular in the form of alkali metal or alkaline-earth metal salts, ammonium salts or aminoalcohol salts.

[0359] When the anionic surfactant is in salt form, said salt may be chosen from alkali metal salts, such as the sodium or potassium salt, ammonium salts, amine salts and in particular aminoalcohol salts, and alkaline-earth metal salts, such as the magnesium salt.

[0360] Examples of aminoalcohol salts that may be mentioned include monoethanolamine, diethanolamine and triethanolamine salts, monoisopropanolamine, diisopropanolamine or triisopropanolamine salts, 2-amino- 2-methyl-l -propanol salts, 2-amino-2-methyl-l,3-propanediol salts and tris(hydroxymethyl)aminomethane salts .

[0361] Alkali metal or alkaline-earth metal salts and in particular sodium or magnesium salts are preferably used.

[0362] Advantageously, the anionic surfactant(s) are chosen from sulfate anionic surfactants, carboxylate anionic surfactants and mixtures of these two types of surfactants.

[0363] Preferably, the washing composition comprises at least one carboxylate anionic surfactant, more preferentially chosen from: acyl glycinates, acyl lactylates, acyl sarcosinates, acyl glutamates; alkyl-D-galactosideuronic acids, alkyl ether carboxylic acids, alkyl(C6-C3o aryl) ether carboxylic acids, alkylamido ether carboxylic acids; and also the salts of these compounds; and mixtures thereof; the alkyl and / or acyl groups of these compounds comprising from 6 to 30 carbon atoms, notably from 12 to 28, even better still from 14 to 24 or even from 16 to 22 carbon atoms; the aryl group preferably denoting a phenyl or benzyl group; it being possible for these compounds to be polyoxyalkylenated, notably polyoxyethylenated, and then preferably comprising from 1 to 50 ethylene oxide units, better still from 2 to 10 ethylene oxide units.

[0364] In a particularly preferred manner, the washing composition comprises at least one carboxylate anionic surfactant chosen from (Ce-CiAalkyl ether carboxylic acids, and notably (Ci2-C2o)alkyl ether carboxylic acids.

[0365] Advantageously, the washing composition comprises at least one sulfate anionic surfactant, preferably chosen from alkyl sulfates, alkyl ether sulfates, alkylamido ether sulfates, alkylaryl polyether sulfates, monoglyceride sulfates, the salts of these compounds, and mixtures thereof; the alkyl groups of these compounds preferably comprising from 6 to 30 carbon atoms, notably from 8 to 28, even better still from 10 to 24 or even from 12 to 22 carbon atoms; the aryl group preferably denoting a phenyl or benzyl group; it being possible for these compounds to be (poly)oxyalkylenated, notably (poly)oxyethylenated, and then preferably comprising from 1 to 50 ethylene oxide units, better still from 1 to 10 ethylene oxide units.

[0366] More preferentially, the anionic surfactant(s) are chosen from:

[0367] - C6-C30, better still C8-C24, even better still C10-C24 or even C12-C22 alkyl sulfates

[0368] - C6-C24, better still C10-C24, or even C12-C22, alkyl ether sulfates, preferably comprising from 1 to 20 ethylene oxide units,

[0369] - the salts of these compounds, and mixtures thereof; in particular in the form of alkali metal or alkaline-earth metal salts, ammonium salts or aminoalcohol salts.

[0370] Even more preferentially, the anionic surfactant(s) are chosen from C6-C30, better still C8-C24, even better still C10-C24 or even C12-C22 alkyl sulfates.

[0371] Preferably, the total content of anionic surfactant(s) ranges from 1% to 25% by weight, more preferentially from 2% to 20% by weight, even more preferentially from 5% to 18% by weight and better still from 8% to 15% by weight, relative to the total weight of the washing composition.

[0372] Preferably, the total content of sulfate anionic surfactant(s) present in the composition ranges from 1% to 20% by weight, more preferentially from 5% to 18% by weight, better still from 8% to 15% by weight, relative to the total weight of the washing composition.

[0373] The washing composition may comprise one or more amphoteric or zwitterionic surfactants.

[0374] In particular, the amphoteric or zwitterionic surfactant(s), which are preferably non-silicone, used in the washing composition may notably be derivatives of optionally quaternized aliphatic secondary or tertiary amines, in which derivatives the aliphatic group is a linear or branched chain including from 8 to 22 carbon atoms, said amine derivatives containing at least one anionic group, for instance a carboxylate, sulfonate, sulfate, phosphate or phosphonate group.

[0375] Mention may in particular be made of (C8-C2o)alkylbetaines, (Cs- C2o)alkylsulfobetaines, (C8-C2o)alkylamido(Ci-C6)alkylbetaines and (Cs- C2o)alkylamido(Ci-C6)alkylsulfobetaines, and mixtures thereof.

[0376] Among the optionally quaternized derivatives of secondary or tertiary aliphatic amines that may be used, as defined above, mention may also be made of the compounds having the respective structures (III) and (IV) below: Ra-CONHCH2CH2-N+(Rb)(Rc)-CH2COO-, M+, X’ (III) in which formula (III):

[0377] - Rarepresents a Cio to C30 alkyl or alkenyl group derived from an acid RaCOOH preferably present in hydrolysed coconut kernel oil; preferably, Rarepresents a heptyl, nonyl or undecyl group;

[0378] - Rb represents a P -hydroxy ethyl group;

[0379] - Rcrepresents a carboxymethyl group;

[0380] - M+represents a cationic counterion derived from an alkali metal or alkaline-earth metal, such as sodium, an ammonium ion or an ion derived from an organic amine; and

[0381] - X" represents an organic or inorganic anionic counterion, such as that chosen from halides, acetates, phosphates, nitrates, (Ci-C4)alkyl sulfates, (Ci-C4)alkyl sulfonates or (Ci-C4)alkylaryl sulfonates, in particular methyl sulfate and ethyl sulfate; or alternatively M+and X" are absent;

[0382] Ra’-CONHCH2CH2-N(B)(B') (IV) in which formula (IV):

[0383] - B represents the group -CH2CH2OX';

[0384] - B’ represents the group -(CH2) / Y\ with z = 1 or 2;

[0385] - X’ represents the group -CH2COOH, -CH2-COOZ’, -CH2CH2COOH or CH2CH2- COOZ’, or a hydrogen atom;

[0386] - Y’ represents the group -COOH, -COOZ’ or -CH2CH(OH)SO3H or the group CH2CH(OH)SO3-Z’;

[0387] - Z’ represents a cationic counterion derived from an alkali metal or alkaline-earth metal, such as sodium, an ammonium ion or an ion derived from an organic amine;

[0388] - Ra’ represents a Cio to C30 alkyl or alkenyl group of an acid Ra’-COOH which is preferably present in coconut kernel oil or in hydrolysed linseed oil, preferably Ra’ is an alkyl group, notably a C17 group, and its iso form, or an unsaturated C17 group.

[0389] These compounds are classified in the CTFA dictionary, 5th edition, 1993, under the names disodium cocoamphodiacetate, disodium lauroamphodiacetate, disodium caprylamphodiacetate, disodium capryloamphodiacetate, disodium cocoamphodipropionate, disodium lauroamphodipropionate, disodium caprylamphodipropionate, disodium capryloamphodipropionate, lauroamphodipropionic acid and cocoamphodipropionic acid.

[0390] By way of example, mention may be made of the cocoamphodiacetate sold by Rhodia under the trade name Miranol® C2M Concentrate. Use may also be made of the compounds of formula (V):

[0391] Ra’ ’ -NHCH(Y’ ’ )-(CH2)nCONH(CH2)n’ -N(Rd)(Re) (V) in which formula (V):

[0392] - Y” represents the group -COOH, -COOZ” or -CH2-CH(OH)SO3H or the group CH2CH(OH)SO3-Z” ;

[0393] - Rd and Re, independently of each other, represent a Ci to C4 alkyl or hydroxy alkyl radical;

[0394] - Z” represents a cationic counterion derived from an alkali metal or alkaline-earth metal, such as sodium, an ammonium ion or an ion derived from an organic amine;

[0395] - Ra” represents a C10 to C30 alkyl or alkenyl group of an acid Ra”-COOH which is preferably present in coconut kernel oil or in hydrolysed linseed oil; and

[0396] - n and n’ denote, independently of each other, an integer ranging from 1 to 3.

[0397] Among the compounds of formula (V), mention may be made of the compound classified in the CTFA dictionary under the name sodium diethylaminopropyl cocoaspartamide and sold by Chimex under the name Chimexane HB.

[0398] These compounds may be used alone or as mixtures.

[0399] Among the amphoteric or zwitterionic surfactants mentioned above, use is advantageously made of (Cs-C2o)alkylbetaines, such as cocobetaine, (Cs- C2o)alkylamido(C3-C8)alkylbetaines, such as cocamidopropylbetaine, (Cs- C2o)alkylamphoacetates, (C8-C2o)alkylamphodiacetates and mixtures thereof.

[0400] More preferentially, the amphoteric or zwitterionic surfactant(s) are chosen from (C8-C2o)alkylbetaines, (C8-C2o)alkylamido(C3-C8)alkylbetaines, and mixtures thereof; even more preferentially from cocobetaine, cocamidopropylbetaine, and mixtures thereof.

[0401] Even better still, the amphoteric or zwitterionic surfactant(s) are chosen from (C8-C2o)alkylbetaines and most particularly cocobetaine.

[0402] Preferably, the total content of amphoteric or zwitterionic surfactant(s) present in the washing composition ranges from 0.1% to 15% by weight, more preferentially from 0.5% to 10% by weight, even more preferentially from 1% to 5% by weight, relative to the total weight of the washing composition.

[0403] Preferably, the total content of (C8-C2o)alkylbetaine(s) and (Cs- C2o)alkylamido(C3-C8)alkylbetaine(s) present in the washing composition ranges from 0.1% to 15% by weight, more preferentially from 0.5% to 10% by weight, even more preferentially from 1% to 5% by weight, relative to the total weight of the washing composition.

[0404] More preferentially, the total content of (Cs-C2o)alkylbetaine(s) present in the washing composition ranges from 0.1% to 15% by weight, more preferentially from 0.5% to 10% by weight, even more preferentially from 1% to 5% by weight, relative to the total weight of the washing composition.

[0405] Advantageously, the total content of anionic surfactant(s) and amphoteric or zwitterionic surfactant(s) present in the washing composition is greater than or equal to 5% by weight, more preferentially greater than or equal to 10% by weight, better still greater than or equal to 15% by weight, relative to the total weight of the composition.

[0406] Preferably, the total content of anionic surfactant(s) and amphoteric or zwitterionic surfactant(s) present in the washing composition ranges from 5% to 40% by weight, more preferentially from 10% to 25% by weight, even more preferentially from 15% to 20% by weight, relative to the total weight of the washing composition.

[0407] Preferably, the pH of the washing composition is between 3 and 9, preferentially between 4 and 8, more preferentially between 4 and 6, better still between 4 and 5.5.

[0408] If necessary, one or more customarily used basifying agents may be added to the washing composition to adjust the pH to the desired value.

[0409] Among the customarily used basifying agents, mention may be made of aqueous ammonia and mineral or organic hydroxides.

[0410] Preferably, the total content of water in the washing composition ranges from 60% to 99% by weight, more preferentially from 70% to 98% by weight, even more preferentially from 75% to 95% by weight, and better still from 75% to 90% by weight, relative to the total weight of the washing composition.

[0411] The washing composition may also contain additives commonly used in cosmetics, for example antifoams, thickening agents, moisturizers, clays, mineral fillers, UV screening agents, fragrances, cationic or non-ionic surfactants, vitamins, preservatives, silicones, waxes, and mixtures thereof. These additives may be present in the composition according to the invention in an amount ranging from 0% to 20% by weight, relative to the total weight of the washing composition.

[0412] A person skilled in the art will take care to select these optional additives and the amounts thereof so that they do not adversely affect the properties of the washing composition.

[0413] The washing composition is preferably a shampoo.

[0414] Implementation

[0415] Steps a), b) and c) of the treatment process according to the invention are distinct from one another. Steps a), b) and c) of the treatment process according to the invention are performed sequentially, step a) first, followed by step(s) b) and, finally, step(s) c). Steps a), b) and c) of the treatment process according to the invention cannot be performed simultaneously on the keratin fibres. a) Application of the dyeing composition ( C)

[0416] Preferably, the application of the composition (C) to the keratin fibres is performed by any conventional means such as a comb or the fingers or by deposition techniques such as an aerosol.

[0417] After the application of the composition (C) to the keratin fibres, said keratin fibres can be dried. Preferably, the keratin fibres are dried with a drying device such as a hood, a hairdryer or a Climazon. When the drying step is performed with a hood or a hairdryer, the drying temperature is above 40°C.

[0418] After the drying step, a step of shaping the keratin fibres may be performed with a keratin fibre shaping device such as a straightening iron, a crimping or curling iron or a steam iron, preferably a straightening iron or a steam iron. Preferably, the shaping step is performed at a temperature above 100°C. The iron may be applied to the keratin fibres by separate successive strokes of a few seconds, or by moving or gliding gradually along the keratin fibres. Preferably, the iron is applied in a continuous movement from the root to the end of the keratin fibres, in one or more passes.

[0419] After the application of the composition (C), a step of rinsing the keratin fibres can be carried out. The term “rinsing step" refers to the application of water to the keratin fibres.

[0420] Preferably, there is a leave-on time T between the application of the dyeing composition (C) and the application of the composition (D) to the keratin fibres.

[0421] Preferably, the time T between the application of the dyeing composition (C) and the first application of the composition (D) to the keratin fibres ranges from 1 hour to 30 days, preferentially from 1 day to 30 days, more preferentially from 15 days to 30 days. b) Application of the bleaching composition (D)

[0422] The application of the composition (D) to the keratin fibres can be performed by any conventional means such as a comb or the fingers or by deposition techniques such as an aerosol.

[0423] Preferably, step b) of eliminating the artificial dyeing from the keratin fibres is repeated at least twice on the keratin fibres; more preferentially, said step b) is performed twice on the keratin fibres.

[0424] Thus, preferably, the application of the composition (D) to the dyed keratin fibres is repeated several times, preferably at least twice.

[0425] Preferably, a step of massaging the keratin fibres is performed after applying the composition (D) to said keratin fibres.

[0426] The massaging step consists in kneading the keratin fibres treated with the composition (D), with the fingers, from the root to the ends for a period preferably ranging from 5 seconds to 5 minutes; preferably from 10 seconds to 2 minutes.

[0427] Over the course of the massaging step, use may be made of a particular device, such as an exfoliating glove.

[0428] The massaging step may be optionally repeated several times, for example twice, and optionally with an intermediate leave-on time.

[0429] After application of the composition (D) to the dyed keratin fibres, and after the optional massaging step(s), a leave-on time for the composition (D) preferably takes place.

[0430] Preferably, the leave-on time for leaving the composition (D) on the dyed keratin fibres, after the step of applying the composition (D) or after the optional massaging step(s), ranges from 1 minute to 3 hours, preferentially from 5 minutes to 2 hours, more preferentially from 10 minutes to 1 hour. During the leave-on time for leaving the composition (D) on the keratin fibres, the keratin fibres may be partially or totally covered with aluminium foil or with a plastic film.

[0431] After application of the composition (D) to the dyed keratin fibres, and after the optional massaging step(s), a step of rinsing the keratin fibres may optionally be performed.

[0432] The term “rinsing step” refers to the application of water to the keratin fibres.

[0433] Preferably, a step of rinsing the keratin fibres is performed after applying the composition (D) to said keratin fibres.

[0434] Preferably, a step of rinsing the keratin fibres is performed after applying the composition (D) to said keratin fibres and after the leave-on time for leaving said composition (D) on said keratin fibres.

[0435] More preferentially, if the rinsing step is performed, it takes place after the leave-on time for leaving the composition (D) on the keratin fibres as described previously.

[0436] Preferably, the rinsing step, when the rinsing step is carried out, ranges from 5 seconds to 1 minute, more preferentially from 10 seconds to 45 seconds, even more preferentially from 10 seconds to 30 seconds.

[0437] After application of the composition (D) to the keratin fibres, notably after the optional rinsing step, said keratin fibres can optionally be dried. Preferably, the keratin fibres are dried with a drying device such as a hood, a hairdryer or a Climazon. When the drying step is performed with a hood or a hairdryer, the drying temperature is above 40°C. c) Application of the washing composition

[0438] Advantageously, said step c) of applying a washing composition to the keratin fibres is repeated at least twice, preferably twice.

[0439] Preferably, the application(s) of the washing composition to the keratin fibres treated with the composition (D) are carried out after the optional massaging step(s) or after the optional step of rinsing said keratin fibres.

[0440] Preferably, a rinsing step is performed between each application of the washing composition to the keratin fibres.

[0441] The keratin fibres can optionally be dried in the open air or by means of a drying device as described previously. According to a preferred embodiment, the process for treating keratin fibres comprises a treatment cycle comprising: a’) a step of dyeing the keratin fibres, comprising:

[0442] 1) at least one application of the composition (C) as described previously;

[0443] 2) optionally a rinsing step as described previously;

[0444] 3) optionally a time T between the application of the composition (C) as described previously and the application of the composition (D) as described previously; then b') a step of removing the artificial dyeing from the keratin fibres, comprising:

[0445] 1') at least one application of the composition (D) as described previously;

[0446] 2') optionally a massaging step as described previously;

[0447] 3') optionally a leave-on time for leaving the composition (D) on the keratin fibres, as described previously;

[0448] 4') optionally a step of rinsing the keratin fibres, as described previously; then c') at least one application of a washing composition as described previously; preferably at least two successive applications of said washing composition, optionally with a rinsing step between the 2 applications of the washing composition.

[0449] Preferably, step b') of removing the artificial dyeing from the keratin fibres is repeated at least twice on the keratin fibres; more preferentially, said step b') is performed twice on the keratin fibres.

[0450] Thus, preferably, the application of the composition (D) to the dyed keratin fibres is repeated several times, preferably at least twice.

[0451] Process for eliminating an artificial dyeing from the keratin fibres

[0452] Another subject of the invention is a process for eliminating an artificial dyeing from the keratin fibres, comprising at least the application to the dyed keratin fibres of an aqueous composition (D) having an acidic pH and comprising at least one acidic agent chosen from organic acids, mineral acids, and mixtures thereof; said artificial dyeing of keratin fibres having been obtained by application to said keratin fibres of a dyeing composition (C) comprising: (i) at least one compound of formula (I) below: in which:

[0453] - R1represents a linear or branched, saturated or unsaturated, conjugated or nonconjugated, acyclic or cyclic, aromatic or non-aromatic C2 to C14 polyvalent hydrocarbon radical, R1also being: a) optionally substituted with one or more hydroxyl OH or dialkylamino - N(R)2groups with R representing a (Ci-C4)alkyl group, a carboxy -C(O)-OH group or a vinyl group, and / or b) optionally interrupted with one or more heteroatoms or groups chosen from O, S, carbonyl -C(O)-, amine -N(R'), or combinations thereof, in which R' represents a hydrogen atom, a linear or branched alkyl group having from 1 to 4 carbon atoms, optionally substituted with at least one hydroxyl (OH) group or optionally substituted with -X-C(O)-C(Ra)(Rb)-C(O)-R2;

[0454] - R2represents a linear or branched, saturated or unsaturated Ci to Ce monovalent hydrocarbon radical;

[0455] - Raand Rb, which may be identical or different, represent a hydrogen atom or a (Ci- C4)alkyl group;

[0456] - X is a heteroatom or group chosen from O, S, N(R') or -S-CH2-C(O)-O-, -O-C(O)-CH2-S-, -O-C(O)-N(R’)-, -N(R’)-C(O)-O-, -N(R’)-C(O)-N(R’)-;

[0457] - n denotes an integer ranging from 2 to 10, particularly from 3 to 9;

[0458] (ii) at least one pigment; and

[0459] (iii) optionally at least one (poly)amine compound.

[0460] Preferably, the dyeing composition (C) comprises:

[0461] (i) at least one compound of formula (I) as described above;

[0462] (ii) at least one pigment; and

[0463] (iii) at least one (poly)amine compound.

[0464] The description of the compositions (C) and (D) above for the process for treating keratin fibres according to the invention is reiterated here in its entirety to describe the compositions (C) and (D) of the process for eliminating an artificial dyeing from the keratin fibres according to the invention.

[0465] More particularly, all the examples, preferences and embodiments described above for the compositions (C) and (D) in the context of the process for treating keratin fibres according to the invention also apply to the compositions (C) and (D) in the context of the process for eliminating an artificial dyeing from the keratin fibres according to the invention.

[0466] Use of the composition (D)

[0467] A subject of the invention is also the use of an aqueous composition (D) having an acidic pH and comprising at least one acidic agent chosen from organic acids, mineral acids, and mixtures thereof, as described above, for eliminating the artificial dyeing from the keratin fibres dyed beforehand, using a composition (C) as described previously.

[0468] The description of the compositions (C) and (D) above for the treatment process and the elimination process according to the invention is reiterated here in its entirety to describe the compositions (C) and (D) in the context of the use of said composition (D) for eliminating the artificial dyeing from the keratin fibres dyed beforehand using said composition (C).

[0469] More particularly, all the examples, preferences and embodiments described above for the compositions (C) and (D) in the context of the treatment process and the elimination process according to the invention also apply to the compositions (C) and (D) in the context of the use of said composition (D) for eliminating the artificial dyeing from the keratin fibres dyed beforehand using said composition (C).

[0470] Examples

[0471] Preparation of the compounds

[0472] The compounds of formula (I) as described below are used in the compositions exemplified below: Compound of formula (I) #1: Sucrose bearing acetoacetate functions (8 eq

[0473] The compound of formula (I) #1 was synthesized according to the following scheme: in which scheme Rl, which may be identical or different, represents a hydrogen atom or a -C(O)-CH2-C(O)-CH3 group, it being understood that at least two radicals Rl represent -C(O)-CH2-C(O)-CH3; notably, the 8 radicals Rl represent - C(O)-CH2-C(O)-CH3.

[0474] 100 g of sucrose and 406.55 g of tert-butyl acetoacetate are placed in a 1- litre three-necked flask equipped with a mechanical stirrer and a distillation column. The reaction medium is heated using an oil bath (oil bath temperature 140°C-150°C) for 4 h. After 4 h, NMR confirms the grafting of the acetoacetate function. The reaction medium is then concentrated on a rotary evaporator at 150°C under continuous vacuum. A viscous yellow-orange liquid is obtained, corresponding after analysis to the expected product.

[0475] Compound of formula (I) #2: K-FLEX 7301 sold by King Industries

[0476] The (poly)amine compounds as described above are used in the compositions exemplified below: [Table 2]

[0477] Example 1 The dyeing compositions A to E as described in Table 3 were prepared: the amounts are expressed as mass% of active material, unless otherwise mentioned.

[0478] [Table 3]

[0479] Protocol for dyeing locks of hair:

[0480] Each of the compositions A to E was applied to locks of dry natural hair containing 90% white hairs, in a proportion of 1 g of composition per gram of lock. After applying the compositions A to E to the locks of hair, said locks were combed and dried with a hairdryer, and then left to rest for 24 hours at ambient temperature.

[0481] Moreover, the compositions F to J as described in Table 4 were prepared: the amounts are expressed as mass% of active material, unless otherwise mentioned.

[0482] [Table 4] Protocol for treating keratin fibres:

[0483] Once the locks have been dyed with the compositions A to E, a comparative study was carried out by comparing processes according to the invention Pl with a comparative process P2.

[0484] According to the process Pl according to the invention, each of the acidic compositions F to J, respectively, was applied to the locks of hair dyed beforehand with one of the dyeing compositions A to E, in a proportion of 2 g of acidic composition per gram of lock.

[0485] The locks of hair were then massaged (fingers passed along the lock 10 times, i.e. 20 seconds).

[0486] After the massaging step, the locks were encased occlusively in aluminium foil with a leave-on time of between 10 minutes and 60 minutes at 35°C.

[0487] The locks of hair were then subjected to two successive cycles of shampoo washing according to the protocol described below.

[0488] Once the two cycles of shampoo washing have been performed, the locks of hair are combed and dried with a hairdryer.

[0489] According to the comparative process P2, each of the locks dyed respectively with one of the compositions A to E were subjected to two successive cycles of shampoo washing according to the protocol described below.

[0490] Once the two cycles of shampoo washing have been performed, the locks of hair are combed and dried with a hairdryer.

[0491] The comparative process P2 does not comprise the application of an acidic composition F to J to the locks.

[0492] Shampoo washing protocol

[0493] The locks of dyed hair are combed, moistened with water at 35 °C and then passed between the fingers 5 times for 5 seconds. The locks of hair are then squeezed dry between two fingers.

[0494] A standard shampoo (Gamier Ultra Doux) is applied uniformly to the dyed locks, in a proportion of 0.4 g of standard shampoo per gram of locks, the locks of hair being massaged gently along their length (6 passes) for 15 seconds, from the root to the end. The locks of hair are then placed on a watch glass and allowed to stand for 1 minute.

[0495] Next, the locks of hair are rinsed with water while passing the locks between the fingers (15 passes). The locks of hair are then squeezed dry between two fingers before the next shampoo wash.

[0496] The processes evaluated are summarized in the following table:

[0497] [Table 5]

[0498] Evaluation of the results of the treatment process:

[0499] The persistence of the colour of the locks was evaluated in the CIE L*a*b* system using a Minolta CM3600A Spectrophotometer colorimeter (illuminant D65, angle 10°, specular component included).

[0500] The colour persistence evaluation is performed by means of the colour difference AE' between the undyed locks (before application of a dyeing composition, in other words the natural locks) and the dyed locks after they have undergone the elimination / makeup removal process according to the protocol described above.

[0501] The lower the value of AE', the more efficient the elimination of the artificial dyeing and the closer the hair lock gets to its natural colour again.

[0502] The value of AE’ is calculated according to the following equation:

[0503] In this equation, L*a*b* represent the values measured after the treatment process has been performed, and Li*ai*bi* represent the values measured before dyeing of the hair, that is to say before application of the compositions A to E to the hair (natural colour). The results are collated in the following table: [Table 6]

[0504] (1) the pH is adjusted to 4 using concentrated sodium hydroxide at 1 g / 1. (2) the pH is adjusted to 3 using concentrated sodium hydroxide at 1 g / 1.

[0505] (3) the pH is adjusted to 3.5 using concentrated sodium hydroxide at 1 g / 1.

[0506] The locks of hair treated with the treatment processes Pl according to the invention show better elimination of the artificial dyeing obtained using at least one acetoacetylated compound and at least one pigment, compared to the locks of hair treated with comparative process P2.

Claims

CLAIMS1. Process for treating keratin fibres, comprising, in the following order: a) a dyeing step comprising the application to the keratin fibres of at least one dyeing composition (C) comprising:(i) at least one compound of formula (I) below:in which:- R1represents a linear or branched, saturated or unsaturated, conjugated or nonconjugated, acyclic or cyclic, aromatic or non-aromatic, C2 to C14 polyvalent hydrocarbon radical, R1also being: a) optionally substituted with one or more hydroxyl -OH or dialkylamino -N(R)2 groups with R representing a (Ci-C4)alkyl group, a carboxy -C(O)-OH group or a vinyl group, and / or b) optionally interrupted with one or more heteroatoms or groups chosen from O, S, carbonyl -C(O)-, amine -N(R'), or combinations thereof, in which R' represents a hydrogen atom, a linear or branched alkyl group having from 1 to 4 carbon atoms, optionally substituted with at least one hydroxyl (-OH) group or optionally substituted with -X-C(O)-C(Ra)(Rb)-C(O)-R2;- R2represents a linear or branched, saturated or unsaturated Ci to Ce monovalent hydrocarbon radical;- Raand Rb, which may be identical or different, represent a hydrogen atom or a (Ci- C4)alkyl group;- X is a heteroatom or group chosen from O, S, N(R’) or -S-CH2-C(O)-O-, -O-C(O)-CH2-S-, -O-C(O)-N(R’)-, -N(R’)-C(O)-O-, -N(R’)-C(O)-N(R')-;- n denotes an integer ranging from 2 to 10, particularly from 3 to 9; and(ii) at least one pigment; then b) a step of eliminating the dyeing from the keratin fibres obtained via step a), comprising the application to the dyed keratin fibres of an aqueous composition (D) having an acidic pH and comprising at least one acidic agent chosen from organicacids, mineral acids, and mixtures thereof; then c) a step of applying to the keratin fibres a washing composition comprising at least one surfactant.

2. Process according to Claim 1, characterized in that the compound(s) of formula (I) are chosen from those of formula (la):in which:- R1is as defined in claim 1, and particularly R1represents a linear or branched, saturated or unsaturated, conjugated or non-conjugated, acyclic or cyclic, aromatic or non-aromatic C2 to C14, preferably C3-C12 and preferably C4-C10 polyvalent hydrocarbon radical, R1also being: a) optionally substituted with one or more hydroxyl groups -OH, and / or b) optionally interrupted with one or more heteroatoms or groups chosen from O, S and -N(R'), preferably interrupted with one or more oxygen atoms, in which R’ is as defined for formula (I) in Claim 1 ;- R2is as defined in Claim 1, preferably R2represents a linear or branched (Ci- Cfjalkyl group, preferably a (Ci-C 4)alkyl group, more preferentially methyl or tertbutyl, such as methyl; and- n denotes an integer ranging from 2 to 10, preferably ranging from 2 to 9.

3. Process according to Claim 1 or 2, characterized in that the composition (C) also comprises at least one (poly)amine compound, preferably chosen from polyether triamines, aminoalkoxysilanes, and mixtures thereof.

4. Process according to any one of the preceding claims, characterized in that the pH of the composition (D) is less than 7, preferably less than 5, more preferentially between 0.8 and 4, even more preferentially between 1 and 3.75, better still between 1.75 and 3.5.

5. Process according to any one of the preceding claims, characterized in that the organic acid(s) are chosen from phytic acid, maleic acid, fumaric acid, benzilic acid, retinoic acid, l,4-benzene-di(3-methylidene-10-camphorsulfonic) acid, thioglycolic acid, thiolactic acid, hydroxy acids such as ascorbic acid, kojic acid, citric acid, caffeic acid, salicylic acid, lactic acid, methyl lactic acid, mandelic acid, glucuronic acid, glycolic acid, 2-hydroxybutanoic acid, 2-hydroxypentanoic acid, 2- hydroxyhexanoic acid, 2-hydroxyheptanoic acid, 2-hydroxyoctanoic acid, phenyllactic acid, gluconic acid, galacturonic acid, aleuritic acid, ribonic acid, tartronic acid, tartaric acid, malic acid, and mixtures thereof; preferably from hydroxy acids, in particular alpha-hydroxy acids, maleic acid, phytic acid, and mixtures thereof; more preferentially from lactic acid, citric acid, glycolic acid, maleic acid, phytic acid, and mixtures thereof.

6. Process according to any one of the preceding claims, characterized in that the mineral acid(s) are chosen from hydrochloric acid, phosphoric acid, phosphorous acid, sulfuric acid, and mixtures thereof, preferably from hydrochloric acid.

7. Process according to any one of the preceding claims, characterized in that the acidic agent(s) are chosen from organic acids, preferably from lactic acid, citric acid, glycolic acid, maleic acid, phytic acid, and mixtures thereof.

8. Process according to any one of the preceding claims, characterized in that the acidic agent(s) have a solubility in water of at least 1 g per litre of water, preferably at least 5 g per litre of water.

9. Process according to any one of the preceding claims, characterized in that the total content of acidic agent(s) in the composition (D) is within the range extending from 0.001% to 30% by weight, more preferentially from 0.01% to 25% by weight, even more preferentially from 0.05% to 20% by weight, better still from 0.1% to 20% by weight, even better still from 0.2% to 20% by weight, relative to the total weight of the composition (D).

10. Process according to any one of the preceding claims, characterized in that it also comprises a step of massaging the keratin fibres, carried out after applying the composition (D) to said keratin fibres.

11. Process according to any one of the preceding claims, characterized in that the application of the composition (D) to the dyed keratin fibres is repeated several times, preferably at least twice.

12. Process according to any one of the preceding claims, characterized in that the washing composition comprises at least one anionic surfactant, and more preferentially at least one anionic surfactant and at least one amphoteric or zwitterionic surfactant.

13. Process for eliminating an artificial dyeing from the keratin fibres, comprising at least the application to the dyed keratin fibres of an aqueous composition (D) having an acidic pH and comprising at least one acidic agent chosen from organic acids, mineral acids, and mixtures thereof, as defined in any one of Claims 1 and 4 to 9; said artificial dyeing of the keratin fibres having been obtained by application to said keratin fibres of a dyeing composition (C) as defined in any one of Claims 1 to 3.

14. Use of an aqueous composition (D) having an acidic pH and comprising at least one acidic agent chosen from organic acids, mineral acids, and mixtures thereof, as defined in any one of Claims 1 and 4 to 9, for eliminating the artificial dyeing from the keratin fibres, dyed beforehand using a composition (C) as defined in any one of Claims 1 to 3.

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