Discoloring composition for keratin fibers dyed with oxidative dyes or direct dyes

Abstract

The present invention is directed to a composition for discoloring keratin fibers dyed with oxidative dyes and / or direct dyes, preferably human keratin fibers, more preferably human hair, comprising: a) one or more organic sulfinic acid(s), and / or their salt(s), and / or their mixtures, one or more compounds selected from the following groups: b1) one or more inorganic thickening agent(s), selected from clay minerals, b2) one or more salt(s) of a divalent or trivalent metal cation(s), selected from zinc salts, magnesium salts, iron salts, copper salts, manganese salts, cobalt salts, and aluminium salts, and b3) one or more oxide(s) of a divalent or trivalent metal cation(s), zinc oxides, magnesium oxides, iron oxides, copper oxides, manganese oxides, cobalt oxides, and aluminium oxides, and / or their mixtures.

Description

[0001] DISCOLORING COMPOSITION FOR KERATIN FIBERS DYED WITH OXIDATIVE

[0002] DYES OR DIRECT DYES

[0003] Field of the invention

[0004] The present invention is directed to a cosmetic composition for discoloring keratin fibers having been dyed with oxidative dyes or directed dyes. A kit-of-parts and bleaching / decoloring method is disclosed.

[0005] Background of the invention

[0006] Consumers demand long-lasting high-performance products for perfectly covering gray hair. Such products typically comprise oxidative hair dyes. However, fashion trends are quickly changing, and the long lastingness of oxidative hair dyes may be perceived as a disadvantage for customers desiring a new look instantly. Therefore, there is a need for products being able to remove oxidative and direct hair dyes.

[0007] Conventional color removing products use the so-called "bleach wash" method, i.e. , the oxidative destruction of oxidative hair dyes with the help of persulfates and peroxides. Unfortunately, these techniques confer a high degree of damage to the hair fibers. Moreover, these techniques always lead to significant lightening of the hair because the natural melanin is destroyed along with the artificial dyes.

[0008] Contrary to the oxidative color removal, reductive color removal techniques use reducing agents which are more selective to artificial dyes. The multimeric oxidative dyes within the hair fibers are reduced to monomers and can consequently be washed out of the fibers due to the smaller molecular weight of monomers. The oxidative damage is low and there is no destruction of the natural melanin. Thus, no additional lightening of the hair appears.

[0009] Unfortunately, the performance of the reductive techniques is lower in comparison to the oxidative ones, and, therefore, there is a real need to develop reductive color removing compositions with improved performance.

[0010] Summary of the invention

[0011] The first object of the present invention is a composition for discoloring keratin fibers dyed with oxidative dyes and / or direct dyes, preferably human keratin fibers, more preferably human hair, comprising: a) one or more organic sulfinic acid(s), and / or their salt(s), and / or their mixtures, - one or more compounds selected from the following groups: b1 ) one or more inorganic thickening agent(s), selected from clay minerals, b2) one or more salt(s) of a divalent or trivalent metal cation(s), selected from zinc salts, magnesium salts, iron salts, copper salts, manganese salts, cobalt salts, and aluminium salts, and b3) one or more oxide(s) of a divalent or trivalent metal cation(s), selected from zinc oxides, magnesium oxides, iron oxides, copper oxides, manganese oxides, cobalt oxides, and aluminium oxides, and / or their mixtures.

[0012] The second object of the present invention is a kit-of-parts for discoloring keratin fibers dyed with oxidative dyes and / or direct dyes, preferably human keratin fibers, more preferably human hair, comprising:

[0013] - a composition A comprising one or more compound(s) according to group a) as defined above,

[0014] - a composition B comprising one or more compound(s) according to groups b1 ), b2), b3), and / or their mixtures, as defined above, wherein at least one of the compositions A and B is an aqueous composition.

[0015] The third object of the present invention is a method for discoloring keratin fibers dyed with oxidative dyes and / or direct dyes, preferably human keratin fibers, more preferably human hair, comprising the following steps: i) providing the composition as defined above or mixing, dispersing and / or dissolving the compositions A and B as defined above to yield an aqueous ready-to-use discoloring composition having a pH in the range of 1 to 9, then ii) applying the ready-to-use discoloring composition onto keratin fibers, then iii) leaving it for a time period in the range of 1 to 60 min, then iv) rinsing-off the ready-to-use discoloring composition with water and optionally drying the keratin fibers. Detailed description of the invention

[0016] The inventors of the present invention have surprisingly and unexpectedly found that compositions, kits, and methods according to the claims of the present invention do not only yield a storage stable product, but also a superior discoloration effect on keratin fibers being dyed with oxidative and / or direct dyes. In addition, the washout of the dyes from the fibers was enhanced and the damage to the fibers was minimal.

[0017] Composition for discoloring dyed keratin fibers

[0018] The present invention is directed to a composition for discoloring keratin fibers dyed with oxidative dyes and / or direct dyes, preferably human keratin fibers, more preferably human hair, comprising: a) one or more organic sulfinic acid(s), and / or their salt(s), and / or their mixtures,

[0019] - one or more compounds selected from the following groups: b1 ) one or more inorganic thickening agent(s) selected from clay minerals, b2) one or more salt(s) of a divalent or trivalent metal cation(s) selected from zinc salts, magnesium salts, iron salts, copper salts, manganese salts, cobalt salts, and aluminium salts, and b3) one or more oxide(s) of a divalent or trivalent metal cation(s) selected from zinc oxides, magnesium oxides, iron oxides, copper oxides, manganese oxides, cobalt oxides, and aluminium oxides, and / or their mixtures.

[0020] The composition of the present invention comprises one or more organic sulfinic acid(s), and / or their salt(s), and / or their mixtures, as compound(s) according to group a).

[0021] Suitably, one or more compound(s) according to group a) is according to the following general structure:

[0022] With the provision that Ri is selected from H, NH4+or a metal cation, R2 is selected from OH, NR5R6 in which R5 and Re, which may be identical or different, are chosen from H or Ci-Ce alkyl, R3 is selected from H, alkyl, alkenyl, cycloalkyl or aryl which is / are unsubstituted or substituted by 1 to 3 identical or different substituents chosen from OH, Ci-Ce alkyl, O-Ci-Ce alkyl, halogen or CF3, R4 is chosen from a radical COOR1, SO3R1, CORs, CONR5R6 or COORs in which R1, R5, and Re have the denotations as above, or R4 denotes H in case R3 denotes an aryl group, in particular an aryl group substituted as described above, and / or their salt(s), and / or their mixtures. Suitable metal cations are all cosmetically acceptable cations such as sodium, potassium, magnesium, and / or calcium.

[0023] Suitable examples for compound(s) according to group a) are furyl-(amino)- methanesulfinic acid, amino-(thien-2-yl)-methanesulfinic acid, amino-(1 H-imidazol-2- yl)-methanesulfinic acid, amino-(1 ,3-thiazol-2-yl)-methanesulfinic acid, amino-(1 ,3- oxazol-2-yl)-methanesulfinic acid, amino-(1 H-pyrrol-2-yl)-methanesulfinic acid, amino-(hydroxyl-2-yl)-methanesulfinic acid, amino-(hydroxyl-4-yl)-methanesulfinic acid, amino-[3-hydroxy-5-(hydroxymethyl)-2-methylpyridin-4-yl]-methanesulfinic acid, amino-(quinolin-2-yl)-methanesulfinic acid, amino-(quinolin-4-yl)-methanesulfinic acid, 1 H-Benzimidazol-2-yl-(amino)-methanesulfinic acid, 1 ,3-benzothiazol-2-yl- (amino)-methanesulfinic acid, 1 ,3-benzoxazol-2-yl-(amino)-methanesulfinic acid, hydroxy-(thien-2-yl)-methanesulfinic acid, hydroxy-(thien-3-yl)-methanesulfinic acid, 3-bromothien-2-yl)-(hydroxyl)-methanesulfinic acid, hydroxy-(1 H-imidazol-2-yl)- methanesulfinic acid, hydroxy-(1 H-imidazol-5-yl)-methanesulfinic acid, hydroxy-(1- methyl-5-nitro-1 H-imidazol-2-yl)-methanesulfinic acid, hydroxy-(1 , 3-thiazol-2-yl)- methanesulfinic acid, hydroxy-(1 ,3-oxazol-2-yl)-methanesulfinic acid, hydroxy-(1 H- pyrrol-2-yl)-methanesulfinic acid, hydroxy-(hydroxyl-2-yl)-methanesulfinic acid, hydroxy-(hydroxyl-4-yl)-methanesulfinic acid, hydroxy-[3-hydroxy-5-(hydroxymethyl)- 2-methylpyridin-4-yl]-methanesulfinic acid, hydroxy-(quinolin-2-yl)-methanesulfinic acid, hydroxy-(quinolin-4-yl)-methanesulfinic acid, 1 H-benzimidazol-2-yl-(hydroxyl)- methanesulfinic acid, 1 ,3-benzothiazol-2-yl-(hydroxyl)-methanesulfinic acid, 1 ,3- Benzoxazol-2-yl-(hydroxy)-methanesulfinic acid, 1 ,2-dihydroxyethane-1 , 2-disulf inic acid, 1 ,3-dihydroxypropane-1 ,3-disulfinic acid, hydroxy-{4-[hydroxy(sulfino)methyl]- phenylj-methanesulfinic acid, {2-chloro-3-[hydroxy-(sulfino)-methyl]-cyclohexyl}- (hydroxy)-methanesulfinic acid, {2-chloro-3-[hydroxyl(sulfino)methyl]cyclopentyl}- (hydroxyl)-methanesulfinic acid, Hydroxy-{5-[hydroxy-(sulfino)-methyl]thien-2-yl}- methanesulfinic acid, hydroxy-{2-[hydroxy(sulfino)-methyl]phenyl}-methanesulfinic acid, hydroxy-{3-[hydroxy-(sulfino)-methyl]-phenyl}-methanesulfinic acid, 1,5- dihydroxypentane-1 ,5-disulfinic acid, 4-hydroxy-4-sulfinobutanoic acid, 1-Hydroxy-4- methoxy-4-oxobutane-1 -sulfinic acid, 1 -Hydroxy-4-ethoxy-4-oxobutane-1 -sulfinic acid, 4-Hydroxy-4-sulfinopentanoic acid, 2-Hydroxy-5-methoxy-5-oxopentane-2- sulfinic acid, 2-Hydroxy-5-ethoxy-5-oxopentane-2 -sulfinic acid, 4-Hydroxy-4- sulfinobut-2-enoic acid, 1-Hydroxy-4-methoxy-4-oxobut-2-ene-1 -sulfinic acid, 1- Hydroxy-4-ethoxy-4-oxobut-2-ene-1 -sulfinic acid, 4-hydroxy-4-sulfinopent-2-enoic acid, 2-Hydroxy-5-methoxy-5-oxopent-3-ene-2-sulfinic acid, 2-Hydroxy-5-ethoxy-5- oxopent-3-ene-2-sulfinic acid, 5-Hydroxy-5-sulfinopentanoic acid, 1-Hydroxy-5- methoxy-5-oxopentane-1 -sulfinic acid, 1 -Hydroxy-5-ethoxy-5-oxopentane-1 -sulfinic acid, 5-hydroxy-5-sulfinohexanoic acid, 2-Hydroxy-6-methoxy-6-oxohexane-2-sulfinic acid, 2-Hydroxy-6-ethoxy-6-oxohexane-2-sulfinic acid, 4-[Hydroxy-(sulfino)-methyl]- benzoic acid, 4-[amino-(sulfino)-methyl]-benzoic acid, {4-[Hydroxy-(sulfino)-methyl]- phenoxy}-acetic acid, {4-[amino-(sulfino)-methyl]-phenoxy}-acetic acid, 3-Hydroxy-4- [hydroxy-(sulfino)-methyl]-benzoic acid, 3-Hydroxy-4-[amino-(sulfino)-methyl]-benzoic acid, (4-cyanophenyl)-(hydroxy)-methanesulfinic acid, [(2-Methoxy-2-oxoethyl)- amino]-(oxo)-methane-sulfinic acid, 2-Hydroxy-2-sulfinoacetic acid, 2-amino-2- sulfino-acetic acid, (4-cyanophenyl)-(amino)-methane-sulfinic acid,(4-nitrophenyl)- (hydroxy)-methane-sulfinic acid, (4-nitrophenyl)-(amino)-methane-sulfinic acid, 4- hydroxy-1 , 1 -dimethyl-4-sulfinopiperidinium, 1 -allyl-4-hydroxy-1 -methyl-4- sulfinopiperidinium, 2-Hydroxy-2-sulfino-propionic acid, 2-amino-2 -sulfino-propionic acid, 2-Hydroxy-2-sulfinato-acetic acid ethyl ester, 2-Amino-2-sulfinato-acetic acid ethyl ester, 4-Hydroxy-1 ,1-dimethylpiperidinium-4-sulfinate,1 -Allyl 4-hydroxy-1- methylpiperidinium-4-sulfinate, 1-Hydroxy-2-(trimethylammonio)-ethane-sulfinate, Hydroxy-[4-(trimethylammonio)-phenyl]-methane-sulfinate, 4-[Hydroxy-(sulfino)- methyl]-benzene-sulfonic acid, 2-[Hydroxy-(sulfino)-methyl]-benzene-sulfonic acid, 3- Hydroxy-3-sulfinato-propionic acid, 3-amino-3-sulfinato-propionic acid, 1 -Hydroxy-2 - methoxy-2-oxoethanesulfinic acid, 2-amino-1-hydroxy-2-oxoethanesulfinic acid, 2- (dimethylamino)-l -hydroxy-2-oxoethanesulfinic acid, hydroxy-(sulfino)-methane- sulfonic acid, Hydroxy-(phenyl)-methane-sulfinic acid, hydroxy-(4-hydroxyphenyl)- methanesulfinic acid, hydroxy-(4-methoxyphenyl)-methane-sulfinic acid, and / or their salt(s), and / or their mixtures.

[0024] Preferably, from the viewpoint of reducing power, one or more compound(s) according to group a) has the following structure:

[0025] With Ri having the same denotation as above.

[0026] The most preferred compound(s) according to group a) is / are 2-hydroxy-2- sulfinoacetic acid, and / or its salts, preferably it is disodium-2-hydroxy-2- sulfinatoacetate.

[0027] It is preferred from the viewpoint of color removal that the total concentration of one or more compound(s) according to group a) is in the range of 0.1 % to 50% by weight, preferably in the range of 0.25% to 40% by weight, more preferably in the range of 0.5% to 30% by weight, still more preferably in the range of 1 % to 20% by weight, still more preferably in the range of 3% to 12% by weight, calculated to the total weight of the composition.

[0028] The composition of the present invention comprises one or more compounds selected from the following groups: b1 ) one or more inorganic thickening agent(s) selected from clay minerals, b2) one or more salt(s) of a divalent or trivalent metal cation(s) selected from zinc salts, magnesium salts, iron salts, copper salts, manganese salts, cobalt salts, and aluminium salts, and b3) one or more oxide(s) of a divalent or trivalent metal cation(s) selected from zinc oxides, magnesium oxides, iron oxides, copper oxides, manganese oxides, cobalt oxides, and aluminium oxides, and / or their mixtures. Preferably, the one or more compound(s) according to group b1) is / are smectite clay minerals, preferably they are smectite clay minerals of natural origin or synthetic clay minerals, furthermore preferably they are hectorite(s), bentonite(s), kaolin(s), montmorrilite(s), and / or their mixtures.

[0029] It is preferred from the viewpoint of viscosity and color removal that the total concentration of compound(s) according to group b1 ) is in the range of 0.1 % to 50% by weight, preferably 0.25% to 40% by weight, more preferably in the range of 0.5% to 30% by weight, more preferably in the range of 1 % to 20% by weight, still more preferably in the range of 2% to 6% by weight, calculated to the total weight of the composition.

[0030] It is further preferred from the viewpoint of discoloration performance that the viscosity of the composition of the present invention is in the range of 1 ,000 mPas to 50,000 mPas, preferably in the range of 2,500 mPas to 30,000 mPas, more preferably in the range of 3,500 mPas to 25,000 mPas, measured with a Brookfield viscometer spindle #5 at 25°C.

[0031] From the viewpoint of discoloration performance, the one or more compound(s) according to group b2) is / are selected from zinc salts, magnesium salts, iron salts, copper salts, manganese salts, cobalt salts, and aluminium salts, and / or their mixtures, preferably said compounds are zinc chloride, zinc sulfate, magnesium chloride, magnesium sulfate, iron (II) chloride, iron (II) sulfate, copper chloride, copper sulfate, manganese chloride, manganese sulfate, cobalt chloride, cobalt sulfate, aluminium chloride, aluminium sulfate, and / or their mixtures, more preferably said compounds are zinc chloride, zinc sulfate, and aluminium chloride, and / or their mixtures, more preferably said compound is zinc chloride.

[0032] It is preferred from the viewpoint of color removal that the total concentration of compound(s) according to group b2) is in the range of 0.1 % to 50% by weight, preferably 0.25% to 40% by weight, more preferably in the range of 0.5% to 30% by weight, more preferably in the range of 1 % to 20% by weight, still more preferably in the range of 2% to 6% by weight, calculated to the total weight of the composition.

[0033] The one or more compound(s) according to group b3) is / are zinc oxides, magnesium oxides, iron oxides, copper oxides, manganese oxides, cobalt oxides, and aluminium oxides, and / or their mixtures. Preferably said compound(s) are zinc oxides or aluminium oxides, and / or their mixtures, more preferably said compounds are zinc oxides, and / or their mixtures.

[0034] It is preferred from the viewpoint of color removal that the total concentration of compound(s) according to group b3) is in the range of 0.1 % to 50% by weight, preferably 0.25% to 40% by weight, more preferably in the range of 0.5% to 30% by weight, more preferably in the range of 1 % to 20% by weight, still more preferably in the range of 2% to 6% by weight, calculated to the total weight of the composition.

[0035] It is further preferred that the total concentration of compound(s) according to any of the groups b1 ), b2), and b3) is in the range of 0.1 % to 50% by weight, preferably 0.25% to 40% by weight, more preferably in the range of 0.5% to 30% by weight, more preferably in the range of 1 % to 20% by weight, still more preferably in the range of 1 % to 6% by weight, calculated to the total weight of the composition.

[0036] It is further preferred that the total concentration of the mixtures of compound(s) according to any of the groups b1 ), b2), and b3) is in the range of 0.1 % to 50% by weight, preferably 0.25% to 40% by weight, more preferably in the range of 0.5% to 30% by weight, more preferably in the range of 1 % to 20% by weight, still more preferably in the range of 1 % to 6% by weight, calculated to the total weight of the composition.

[0037] It is preferred from the viewpoint of stability and acidity that the composition of the present invention comprises one or more sulfonic acid compound according to the following general structure:

[0038] With the provision that R? is selected from H, NH4+or a metal cation, Rs is selected from OH, NR11R12 in which R11 and R12, which may be identical or different, are chosen from H or Ci-Ce alkyl, R9 is selected from H, alkyl, alkenyl, cycloalkyl or aryl which is / are unsubstituted or substituted by 1 to 3 identical or different substituents chosen from OH, Ci-Ce alkyl, O-Ci-Ce alkyl, halogen or CF3, R10 is chosen from a radical COOR7, SO3R7, COR11, CONR11R12 or COORn in which R7, R11 and R12 have the denotations as above, or R10 denotes H when R9 denotes an aryl group, in particular an aryl group substituted as described above, and / or their salt(s), and / or their mixtures, preferably one or more compound(s) according to group b) has the following structure:

[0039] R7O OH o=s - H inr o COOR7

[0040] With R? having the same denotation as above, more preferably one or more sulfonic acid compound is disodium-2-hydroxy-2-sulfonatoacetate.

[0041] When the sulfonic acid compounds are present, it is preferred that the total concentration of sulfonic acid compounds is in the range of 0.1 % to 40% by weight, calculated to the total weight of the composition.

[0042] It is further preferred that the composition of the present invention is an aqueous composition comprising water at 50% by weight or more, preferably at 60% by weight or more, still more preferably at 70% by weight or more, calculated to the total weight of the composition.

[0043] It is preferred from the viewpoint of cosmetic safety that the pH of the composition is 1 or more, preferably 2 or more, still more preferably 2.5 or more.

[0044] It is preferred from the viewpoint of stability that the pH of the composition is 6 or less, preferably 5 or less, still more preferably 4.5 or less.

[0045] For attaining the above-mentioned effects, it is preferred that the pH of the composition is in the range of 1 to 6, more preferably in the range of 2 to 5, still more preferably in the range of 2.5 to 4.5.

[0046] It is further preferred that the composition of the present invention comprises one or more organic reducing agent(s) having at least one thiol group(s), and / or their salt(s), and / or their mixtures, as compound(s) according to group c), and preferably the molar ratio of compound(s) according to group a) to compound(s) according to group c) is in the range of 10:0.1 to 0.1 : 10, preferably in the range of 3: 1 to 1 :4, more preferably it is in the range of 1 .5: 1 to 1 : 1 .5. The term ‘thiol group’ has its common meaning in the field of chemistry, i.e. , it is an unmodified thiol group able to act as reducing moiety within the molecule of the organic compound.

[0047] Suitably, the one or more compound(s) according to group c) is / are cysteine, cystine, cysteamine, thioglycolic acid, thiolactic acid, and / or their salt(s), and / or their mixtures, preferably it is cysteine and / or its salt(s), from the viewpoint of commercial availability.

[0048] Lipophilic compounds and surfactants

[0049] It is preferred from the viewpoint of user convenience and viscosity that the composition of the present invention comprises one or more lipophilic compound being liquid at 25°C and atmospheric pressure as compound(s) according to group d), said compound(s) being preferably selected from from C12 to C22 fatty alcohols, esters of C3 to C22 alcohols with C12 to C22 fatty acids, Cs to C22 fatty acids, vegetable oils, and / or silicones, and / or hydrocarbon-based products, and / or their mixtures.

[0050] Suitable C12 to C22 fatty acohols are linear or branched, saturated or unsaturated fatty alcohols with C12 to C22 substituted with hydroxy or unsubstituted alkyl or alkylene group, preferably they are lauryl alcohol, tridecyl alcohol, myristyl alcohol, pentadecyl alcohol, cetyl alcohol, palmitoleyl alcohol, heptadecyl alcohol, stearyl alcohol, nonadecyl alcohol, arachidyl alcohol, behenyl alcohol, and / or their mixtures.

[0051] Suitable fatty acids are saturated or unsaturated fatty acids with or without a hydroxyl group. Suitable are myristoleic acid, palmitoleic acid, oleic acidlinoleic acid, arachidonic acid, and / or their mixtures.

[0052] Suitable esters of C3 to C22 alcohols with C12 to C22 fatty acids are isopropyl palmitate, isopropyl myristate, octyl palmitate, isocetyl palmitate, octyl stearate, oleyl oleate, ethylhexyl hydroxystearate, myristyl myristate, behenyl behenate, and / or their mixtures.

[0053] Suitable vegetable oils are jojoba oil, avocado oil, sunflower seed oil, walnut oil, peanut oil, olive oil, rapeseed oil, cottonseed oil, palm oil, sesame oil, soybean oil, coconut oil, safflower oil, almond oil, macadamia nut oil, grapefruit seed oil, lemon kernel oil, orange kernel oil, apricot kernel oil, castor oil, and / or their mixtures. Suitable petrolatum-based products are liquid paraffins, especially paraffinum perliquidum and paraffinum subliquidum, polydecenes, and mineral oil, in particular white mineral oil, and / or their mixtures.

[0054] Suitable silicones are dimethylpolysiloxanes, and modified silicones (for example, amino-modified silicones, fluorine-modified silicones, alcohol-modified silicones, polyether-modified silicones, epoxy-mod if ied silicones, or alkyl-modified silicones), but dimethylpolysiloxane, polyether-modified silicones and amino-modified silicones are preferred. Amino-modified silicones are commonly known under their CTFA name amodimethicone.

[0055] Specific examples of suitable commercially available amodimethicone oils such as SF8452C, SS-3551 (all by Dow Coming Toray Co., Ltd.), KF-8004, KF-867S, and KF-8015 (all by Shin-Etsu Chemical Co., Ltd.), and amodimethicone emulsions such as SM8704C, SM8904, BY22-079, FZ-4671 , and FZ-4672 (all by Dow corning Toray Co., Ltd.).

[0056] The amino-modified silicone may be any silicone having an amino group or a quaternary ammonium group, and examples thereof include amine-modified silicone oil having all or a part of the terminal hydroxyl groups capped with a methyl group for example, and an amodimethicone which does not have the terminals capped.

[0057] The most preferred compound according to group d) is cetearyl alcohol.

[0058] Suitably, the total concentration of one or more compound(s) according to group d), preferably the total concentration of C12 to C22 fatty alcohols, esters of C3 to C22 alcohols with C12 to C22 fatty acids, Cs to C22 fatty acids, vegetable oils, and / or silicones, and / or hydrocarbon-based products, and / or their mixtures, is in the range from 0.1 % to 25% by weight, preferably in the range of 0.25% to 20% by weight, more preferably in the range of 0.5% to 15% by weight, still more preferably in the range of 1 % to 10% by weight, calculated to the total weight of the composition.

[0059] Preferably, the composition according to the present invention comprises one or more surfactant(s) as compound(s) according to group e), preferably one or more non-ionic, anionic, cationic or amphoteric / zwitterionic surfactant surfactant(s), and / or their salt(s), and / or their mixtures. Anionic surfactants suitable are in principle known from the cleansing compositions. These are anionic surfactants of the sulfate, sulfonate, carboxylate and alkyl phosphate type, for example, the known C -Cis-alkyl sulfates, and in particular the respective ether sulfates, for example, Ci2-Ci4-alkyl ether sulfate, lauryl ether sulfate, especially with 1 to 4 ethylene oxide groups in the molecule, monoglyceride (ether) sulfates, fatty acid amide sulfates obtained by ethoxylation and subsequent sulfatation of fatty acid alkanolamides, and the alkali salts thereof, as well as the salts of long-chain mono- and dialkyl phosphates. Preferred anionic surfactants are alkyl sulphate surfactants especially lauryl sulphate and its salts.

[0060] Suitable amphoteric / zwitterionic surfactants are in particular the various known betaines such as alkyl betaines, fatty acid amidoalkyl betaines and sulfobetaines, for example, lauryl hydroxysulfobetaine; long-chain alkyl amino acids, such as cocoaminoacetate, cocoaminopropionate and sodium cocoamphopropionate and - acetate are also suitable.

[0061] Typical cationic surfactants are cetyl trimethyl ammonium chloride, stearyl trimonium chloride, dipalmitoyl dimonium chloride, distearyl dimethyl ammonium chloride, stearamidopropyl trimonuim chloride, dioleoylethyl dimethyl ammonium methosulfate, dioleoylethyl hydroxyethylmonium methosulfate.

[0062] The preferred surfactants are nonionic surfactants. Non-limiting examples are long- chain fatty acid mono- and dialkanolamides, such as coco fatty acid mono- or diethanolamide and myristic fatty acid mono or diethanolamide, stearic acid mono or diethanolamide, alkyl polyglucosides with an alkyl group of 8 to 18 carbon atoms, and with 1 to 5 glucoside units, sorbitan esters, such as polyethylene glycol sorbitan stearic, palmitic, myristic and lauric acid esters, fatty acid polyglycol esters or polycondensates of ethyleneoxide and propyleneoxide, as they are on the market, for example, under the trade name "PluronicsR", as well as ethoxylated fatty alcohols, C -C22-fatty alcohol ethoxylates, known by the generic terms "Laureth", "Myristeth", "Oleth", "Ceteth", "Deceth", "Steareth" and "Ceteareth" according to the CTFA nomenclature, including addition of the number of ethylene oxide molecules, e.g., "Laureth-16": The average degree of ethoxylation thereby ranges between about 2.5 and about 100, preferably about 10 and about 30. Preferably, the one or more non-ionic surfactant(s) are selected from alkyl polyglycosides, ethoxylated triglycerides, ethoxylated fatty alcohols, ethoxylated fatty acid esters, and / or their mixtures, still more preferably said compound(s) are selected from ethoxylated C10-C22 fatty alcohols.

[0063] It is further preferred that the concentration one or more compound(s) according to group e), preferably the total concentration of non-ionic surfactant(s), still more preferably the total concentration of ethoxylated C10-C22 fatty alcohols, is in the range from 0.1 % to 25% by weight, preferably in the range of 0.25% to 20% by weight, more preferably in the range of 0.5% to 15% by weight, still more preferably in the range of 1 % to 10% by weight, calculated to the total weight of the composition.

[0064] In a further preferred aspect, the composition of the present invention is an emulsion, preferably an oil-in-water emulsion. Suitably, the compounds according to groups d) and e) as disclosed above are present.

[0065] Composition with 10% by weight of water or less

[0066] In one aspect of the present invention, it is preferred from the viewpoint of stability and transportation costs that the composition comprises water at 10% by weight or less, preferably at 1 % by weight or less, more preferably at 0.1 % by weight or less, calculated to the total weight of the composition, more preferably it is anhydrous.

[0067] For this aspect, it is preferred from the viewpoint of discoloring power that the total concentration of one or more compound(s) according to group a) is 1 % by weight or more, preferably 2% by weight or more, more preferably 3% by weight or more, still more preferably 5% by weight or more, calculated to the total weight of the composition.

[0068] It is preferred from the viewpoint of discoloring power and cosmetic acceptability that the total concentration of one or more compound(s) according to group a) is 60% by weight or less, preferably 50% by weight or less, more preferably 45% by weight or less, calculated to the total weight of the composition.

[0069] For attaining the above-mentioned effects, it is preferred that the total concentration of one or more compound(s) according to group a) is in the range of 1 % to 60% by weight, preferably in the range of 2% to 50% by weight, more preferably in the range of 3% to 45% by weight, still more preferably in the range of 5% to 45% by weight, calculated to the total weight of the composition.

[0070] It is preferred from the viewpoint of reducing power that the total concentration of compound(s) according to any of the groups b1 ), b2), and b3) is 0.5% by weight or more, preferably 0.75% by weight or more, more preferably 1 % by weight or more, still more preferably 5% by weight or more, calculated to the total weight of the composition.

[0071] It is preferred from the viewpoint of cosmetic acceptance that the total concentration of compound(s) according to any of the groups b1), b2), and b3) is 35% by weight or less, preferably 30% by weight or less, more preferably 25% by weight or less, calculated to the total weight of the composition.

[0072] For attaining the above-mentioned effects, it is preferred that the total concentration of one or more compound(s) according to any of the groups b1 ), b2), and b3) is in the range of 0.5% to 35% by weight, preferably in the range of 0.75% to 30% by weight, more preferably in the range of 1 % to 25% by weight, still more preferably in the range of 5% to 25% by weight, calculated to the total weight of the composition.

[0073] It is further preferred from the viewpoint of reducing power that the total concentration of compound(s) according to a) and the compounds according to any of the groups b1 ), b2), and b3) in the composition of the present invention is 40% by weight or more, preferably 50% by weight or more, more preferably 55% by weight or more, calculated to the total weight of the composition.

[0074] It is preferred from the viewpoint of stability that the total concentration of one or more compound(s) according to group c) is 1 % by weight or more, preferably 2% by weight or more, more preferably 5% by weight or more, still more preferably 10% by weight or more, calculated to the total weight of the composition.

[0075] It is preferred from the viewpoint of acidity that the total concentration of one or more compound(s) according to group c) is 30% by weight or less, preferably 25% by weight or less, more preferably 20% by weight or less, calculated to the total weight of the composition.

[0076] The composition according to any of the preceding claims characterized in that the total concentration of one or more compound(s) according to group c) is in the range of 1 % to 30% by weight, preferably in the range of 2% to 25% by weight, more preferably in the range of 5% to 20% by weight, still more preferably in the range of 10% to 20% by weight, calculated to the total weight of the composition.

[0077] In one aspect, the composition of the present invention is a powder composition.

[0078] A powder composition within the meaning of the present invention is any solid composition at 25°C and atmospheric pressure that consists of freely flowing individual particles / aggregates. A powder composition may comprise liquid agents, though. For example, to make the powder dust-free, it may comprise lipophilic compounds being liquid at 25°C and atmospheric pressure at a low percentage. The presence of the lipophilic compounds does not alter the overall state of a powder.

[0079] Hence, the composition of the present invention may optionally comprise one or more pulverulent excipient as compound(s) according to group d), preferably one or more compound(s) according to group d) is cellulose, chemically modified cellulose fibers, lignin fibers, pectin fibers, natural starch(es), chemically modified starch(es), hydrolyzed natural starch(es), diatomaceous earth, kaolin, bentonite, nylon powder, montmorillonit, gypsum, sawdust and perlite, and / or their mixtures, more preferably one or more compound(s) according to group d) is a natural starch.

[0080] Suitable natural starches are potato starch, rice starch, com starch, tapioca starch, wheat starch, and barley starch, and / or their mixtures.

[0081] In case the composition of the present invention comprises one or more compound(s) according to group d), it is preferred that the total concentration of one or more compound(s) according to group d) is 10% by weight, preferably 20% by weight, more preferably 30% by weight, calculated to the total weight of the composition.

[0082] Additional reducing agents

[0083] It is further preferred from the viewpoint of discoloring performance that the composition of the present invention comprises one or more additional reducing agent(s) different from the group(s) according to a) and c), preferably the one or more additional reducing agent(s) is ascorbic acid, and more preferably the total concentration of ascorbic acid is in the range of 0.1 % to 10% by weight, calculated to the total weight of the composition. Kit-of-parts

[0084] The present invention is also directed to a kit-of-parts for discoloring keratin fibers dyed with oxidative dyes and / or direct dyes, preferably human keratin fibers, more preferably human hair, comprising:

[0085] - a composition A comprising one or more compound(s) according to group a) as defined above,

[0086] - a composition B comprising one or more compound(s) according to groups b) as defined above, wherein at least one of the compositions A and B is an aqueous composition.

[0087] The term ‘aqueous’ has the same denotation as disclosed further above.

[0088] In one aspect of the present invention, the composition B is an aqueous composition, and the composition A is not. It is preferred from the viewpoint of stability, that the total concentration of water in the compositions A is 10% by weight or less, preferably 1 % by weight or less, more preferably 0.1 % by weight or less, calculated to the total weight of compositions A, more preferably compositions A is an anhydrous composition.

[0089] Preferably, composition A is a powder composition.

[0090] A powder composition within the meaning of the present invention is any solid composition at 25°C and atmospheric pressure that consists of freely flowing individual particles / aggregates. A powder composition may comprise liquid agents, though. For example, to make the powder dust-free, it may comprise lipophilic compounds being liquid at 25°C and atmospheric pressure as disclosed as compound(s) according to group d) at a low percentage. The presence of the lipophilic compounds does not alter the overall state of a powder.

[0091] Hence, the composition of the present invention may optionally comprise one or more pulverulent excipient, said pulverulent excipient being preferably cellulose, chemically modified cellulose fibers, lignin fibers, pectin fibers, natural starch(es), chemically modified starch(es), hydrolyzed natural starch(es), diatomaceous earth, kaolin, bentonite, nylon powder, montmorillonit, gypsum, sawdust and perlite, and / or their mixtures. Suitable natural starches are potato starch, rice starch, com starch, tapioca starch, wheat starch, and barley starch, and / or their mixtures.

[0092] In case composition A comprises one or more pulverulent excipient, it is preferred that the total concentration of one or more pulverulent excipient is 10% by weight or more, preferably 20% by weight or more, more preferably 30% by weight or more, calculated to the total weight of the composition A.

[0093] It is preferred from the viewpoint of performance that the composition of the present invention is obtainable by mixing / dissolving / dispersing the compositions A and B of the kit directly prior to the application onto keratin fibers.

[0094] Method for discoloring

[0095] The present invention is also directed to a method for discoloring keratin fibers dyed with oxidative dyes and / or direct dyes, preferably human keratin fibers, more preferably human hair, comprising the following steps: i) providing the composition as defined above or mixing, dispersing and / or dissolving the compositions A and B as defined above to yield an aqueous ready-to-use discoloring composition having a pH in the range of 1 to 9, then ii) applying the ready-to-use discoloring composition onto keratin fibers, then iii) leaving it for a time period in the range of 1 to 60 min, then iv) rinsing-off the ready-to-use discoloring composition with water and optionally drying the keratin fibers.

[0096] It is preferred from the viewpoint of reducing power that the pH of the ready-to-use discoloring composition of step i) is in the range of 1 to 7, more preferably in the range of 1 .5 to 5.

[0097] The preferred application time if step ii) is in the range of 2 min to 45 min, more preferably it is in the range of 5 min to 35 min, still more preferably it is in the range of 10 min to 30 min. The present invention is also directed to <1> a composition for discoloring keratin fibers dyed with oxidative dyes and / or direct dyes, preferably human keratin fibers, more preferably human hair, comprising: a) one or more organic sulfinic acid(s), and / or their salt(s), and / or their mixtures,

[0098] - one or more compounds selected from the following groups: b1 ) one or more inorganic thickening agent(s), selected from clay minerals, b2) one or more salt(s) of a divalent or trivalent metal cation(s), selected from zinc salts, magnesium salts, iron salts, copper salts, manganese salts, cobalt salts, and aluminium salts, and b3) one or more oxide(s) of a divalent or trivalent metal cation(s), zinc oxides, magnesium oxides, iron oxides, copper oxides, manganese oxides, cobalt oxides, and aluminium oxides, and / or their mixtures.

[0099] <2> The composition according to clause <1 > characterized in that the composition comprises a) one or more organic sulfinic acid(s), and / or their salt(s), and / or their mixtures, b1 ) one or more inorganic thickening agent(s) selected from clay minerals, and / or their mixtures.

[0100] <3> The composition according to any of the preceding clauses characterized in that the one or more compound(s) according to group b1 ) is / are smectite clay minerals, preferably they are smectite clay minerals of natural origin or synthetic clay minerals, furthermore preferably they are hectorite(s), bentonite(s), kaolin(s), montmomlite(s), and / or their mixtures.

[0101] <4> The composition according to any of the preceding claims characterized in that the total concentration of compound(s) according to group b1 ) is in the range of 0.1 % to 50% by weight, preferably 0.25% to 40% by weight, more preferably in the range of 0.5% to 30% by weight, more preferably in the range of 1 % to 20% by weight, still more preferably in the range of 2% to 6% by weight, calculated to the total weight of the composition. <5> The composition according to any of the preceding clauses characterized in that the composition comprises a) one or more organic sulfinic acid(s), and / or their salt(s), and / or their mixtures, b2) one or more salt(s) of a divalent or trivalent metal cation(s) selected from zinc salts, magnesium salts, iron salts, copper salts, manganese salts, cobalt salts, and aluminium salts, and / or their mixtures.

[0102] <6> The composition according to any of the preceding clauses characterized in that the one or more compound(s) according to group b2) is / are selected from zinc chloride, zinc sulfate, magnesium chloride, magnesium sulfate, iron (II) chloride, iron (II) sulfate, copper chloride, copper sulfate, manganese chloride, manganese sulfate, cobalt chloride, cobalt sulfate, aluminium chloride, aluminium sulfate, and / or their mixtures, preferably said compounds are zinc chloride, zinc sulfate, and aluminium chloride, and / or their mixtures, more preferably said compound is zinc chloride.

[0103] <7> The composition according to any of the preceding clauses characterized in that the total concentration of compound(s) according to group b2) is in the range of 0.1 % to 50% by weight, preferably 0.25% to 40% by weight, more preferably in the range of 0.5% to 30% by weight, more preferably in the range of 1 % to 20% by weight, still more preferably in the range of 2% to 6% by weight, calculated to the total weight of the composition.

[0104] <8> The composition according to any of the preceding clauses characterized in that the composition comprises a) one or more organic sulfinic acid(s), and / or their salt(s), and / or their mixtures, b3) one or more oxide(s) of a divalent or trivalent metal cation(s) selected from zinc oxides, magnesium oxides, iron oxides, copper oxides, manganese oxides, cobalt oxides, and aluminium oxides, and / or their mixtures.

[0105] <9> The composition according to any of the preceding clauses characterized in that the one or more compound(s) according to group b3) is / are zinc oxides or aluminium oxides, and / or their mixtures, more preferably said compounds are zinc oxides, and / or their mixtures. <10> The composition according to any of the preceding clauses characterized in that the total concentration of compound(s) according to group b3) is in the range of 0.1 % to 50% by weight, preferably 0.25% to 40% by weight, more preferably in the range of 0.5% to 30% by weight, more preferably in the range of 1 % to 20% by weight, still more preferably in the range of 2% to 6% by weight, calculated to the total weight of the composition.

[0106] <11 > The composition according to any of the preceding clauses characterized in that the total concentration of compound(s) according to any of the groups b1 ), b2), and b3) is in the range of 0.1 % to 50% by weight, preferably 0.25% to 40% by weight, more preferably in the range of 0.5% to 30% by weight, more preferably in the range of 1 % to 20% by weight, still more preferably in the range of 1 % to 6% by weight, calculated to the total weight of the composition.

[0107] <12> The composition according to any of the preceding clauses characterized in that the viscosity of the composition of the present invention is in the range of 1 ,000 mPas to 50,000 mPas, preferably in the range of 2,500 mPas to 30,000 mPas, more preferably in the range of 3,500 mPas to 25,000 mPas, measured with a Brookfield viscometer spindle #5 at 25°C.

[0108] <13> The composition according to any of the preceding clauses characterized in that the one or more compound(s) according to group a) is according to the following general structure:

[0109] With the provision that Ri is selected from H, NH4+or a metal cation, R2 is selected from OH, NR5R6 in which R5 and Re, which may be identical or different, are chosen from H or Ci-Ce alkyl, R3 is selected from H, alkyl, alkenyl, cycloalkyl or aryl which is / are unsubstituted or substituted by 1 to 3 identical or different substituents chosen from OH, Ci-Ce alkyl, O-Ci-Ce alkyl, halogen or CF3, R4 is chosen from a radical COOR1, SO3R1, CORs, CONR5R6 or COORs in which R1, R5, and Re have the denotations as above, or R4 denotes H in case R3 denotes an aryl group, in particular an aryl group substituted as described above, and / or their salt(s), and / or their mixtures, and preferably Ri are all cosmetically acceptable cations such as sodium, potassium, magnesium, and / or calcium.

[0110] <14> The composition according to any of the preceding clauses characterized in that one or more compound(s) according to group a) are furyl-(amino)- methanesulfinic acid, amino-(thien-2-yl)-methanesulfinic acid, amino-(1 H-imidazol-2- yl)-methanesulfinic acid, amino-(1 ,3-thiazol-2-yl)-methanesulfinic acid, amino-(1 ,3- oxazol-2-yl)-methanesulfinic acid, amino-(1 H-pyrrol-2-yl)-methanesulfinic acid, amino-(hydroxyl-2-yl)-methanesulfinic acid, amino-(hydroxyl-4-yl)-methanesulfinic acid, amino-[3-hydroxy-5-(hydroxymethyl)-2-methylpyridin-4-yl]-methanesulfinic acid, amino-(quinolin-2-yl)-methanesulfinic acid, amino-(quinolin-4-yl)-methanesulfinic acid, 1 H-Benzimidazol-2-yl-(amino)-methanesulfinic acid, 1 ,3-benzothiazol-2-yl- (amino)-methanesulfinic acid, 1 ,3-benzoxazol-2-yl-(amino)-methanesulfinic acid, hydroxy-(thien-2-yl)-methanesulfinic acid, hydroxy-(thien-3-yl)-methanesulfinic acid, 3-bromothien-2-yl)-(hydroxyl)-methanesulfinic acid, hydroxy-(1 H-imidazol-2-yl)- methanesulfinic acid, hydroxy-(1 H-imidazol-5-yl)-methanesulfinic acid, hydroxy-(1- methyl-5-nitro-1 H-imidazol-2-yl)-methanesulfinic acid, hydroxy-(1 , 3-thiazol-2-yl)- methanesulfinic acid, hydroxy-(1 ,3-oxazol-2-yl)-methanesulfinic acid, hydroxy-(1 H- pyrrol-2-yl)-methanesulfinic acid, hydroxy-(hydroxyl-2-yl)-methanesulfinic acid, hydroxy-(hydroxyl-4-yl)-methanesulfinic acid, hydroxy-[3-hydroxy-5-(hydroxymethyl)- 2-methylpyridin-4-yl]-methanesulfinic acid, hydroxy-(quinolin-2-yl)-methanesulfinic acid, hydroxy-(quinolin-4-yl)-methanesulfinic acid, 1 H-benzimidazol-2-yl-(hydroxyl)- methanesulfinic acid, 1 ,3-benzothiazol-2-yl-(hydroxyl)-methanesulfinic acid, 1 ,3- Benzoxazol-2-yl-(hydroxy)-methanesulfinic acid, 1 ,2-dihydroxyethane-1 , 2-disulf inic acid, 1 ,3-dihydroxypropane-1 ,3-disulfinic acid, hydroxy-{4-[hydroxy(sulfino)methyl]- phenylj-methanesulfinic acid, {2-chloro-3-[hydroxy-(sulfino)-methyl]-cyclohexyl}- (hydroxy)-methanesulfinic acid, {2-chloro-3-[hydroxyl(sulfino)methyl]cyclopentyl}- (hydroxyl)-methanesulfinic acid, Hydroxy-{5-[hydroxy-(sulfino)-methyl]thien-2-yl}- methanesulfinic acid, hydroxy-{2-[hydroxy(sulfino)-methyl]phenyl}-methanesulfinic acid, hydroxy-{3-[hydroxy-(sulfino)-methyl]-phenyl}-methanesulfinic acid, 1 ,5- dihydroxypentane-1 ,5-disulfinic acid, 4-hydroxy-4-sulfinobutanoic acid, 1-Hydroxy-4- methoxy-4-oxobutane-1 -sulfinic acid, 1 -Hydroxy-4-ethoxy-4-oxobutane-1 -sulfinic acid, 4-Hydroxy-4-sulfinopentanoic acid, 2-Hydroxy-5-methoxy-5-oxopentane-2- sulfinic acid, 2-Hydroxy-5-ethoxy-5-oxopentane-2 -sulfinic acid, 4-Hydroxy-4- sulfinobut-2-enoic acid, 1 -Hydroxy-4-methoxy-4-oxobut-2-ene-1 -sulfinic acid, 1 - Hydroxy-4-ethoxy-4-oxobut-2-ene-1 -sulfin ic acid, 4-hydroxy-4-sulfinopent-2-enoic acid, 2-Hydroxy-5-methoxy-5-oxopent-3-ene-2-sulfinic acid, 2-Hydroxy-5-ethoxy-5- oxopent-3-ene-2-sulfinic acid, 5-Hydroxy-5-sulfinopentanoic acid, 1-Hydroxy-5- methoxy-5-oxopentane-1 -sulfinic acid, 1 -Hydroxy-5-ethoxy-5-oxopentane-1 -sulfinic acid, 5-hydroxy-5-sulfinohexanoic acid, 2-Hydroxy-6-methoxy-6-oxohexane-2-sulfinic acid, 2-Hydroxy-6-ethoxy-6-oxohexane-2-sulfinic acid, 4-[Hydroxy-(sulfino)-methyl]- benzoic acid, 4-[amino-(sulfino)-methyl]-benzoic acid, {4-[Hydroxy-(sulfino)-methyl]- phenoxy}-acetic acid, {4-[amino-(sulfino)-methyl]-phenoxy}-acetic acid, 3-Hydroxy-4- [hydroxy-(sulfino)-methyl]-benzoic acid, 3-Hydroxy-4-[amino-(sulfino)-methyl]-benzoic acid, (4-cyanophenyl)-(hydroxy)-methanesulfinic acid, [(2-Methoxy-2-oxoethyl)- amino]-(oxo)-methane-sulfinic acid, 2-Hydroxy-2-sulfinoacetic acid, 2-amino-2- sulfino-acetic acid, (4-cyanophenyl)-(amino)-methane-sulfinic acid,(4-nitrophenyl)- (hydroxy)-methane-sulfinic acid, (4-nitrophenyl)-(amino)-methane-sulfinic acid, 4- hydroxy-1 , 1 -dimethyl-4-sulfinopiperidinium, 1 -allyl-4-hydroxy-1 -methyl-4- sulfinopiperidinium, 2-Hydroxy-2-sulfino-propionic acid, 2-amino-2 -sulfino-propionic acid, 2-Hydroxy-2-sulfinato-acetic acid ethyl ester, 2-Amino-2-sulfinato-acetic acid ethyl ester, 4-Hydroxy-1 ,1-dimethylpiperidinium-4-sulfinate,1 -Allyl 4-hydroxy-1- methylpiperidinium-4-sulfinate, 1-Hydroxy-2-(trimethylammonio)-ethane-sulfinate, Hydroxy-[4-(trimethylammonio)-phenyl]-methane-sulfinate, 4-[Hydroxy-(sulfino)- methyl]-benzene-sulfonic acid, 2-[Hydroxy-(sulfino)-methyl]-benzene-sulfonic acid, 3- Hydroxy-3-sulfinato-propionic acid, 3-amino-3-sulfinato-propionic acid, 1 -Hydroxy-2 - methoxy-2-oxoethanesulfinic acid, 2-amino-1-hydroxy-2-oxoethanesulfinic acid, 2- (dimethylamino)-l -hydroxy-2-oxoethanesulfinic acid, hydroxy-(sulfino)-methane- sulfonic acid, Hydroxy-(phenyl)-methane-sulfinic acid, hydroxy-(4-hydroxyphenyl)- methanesulfinic acid, hydroxy-(4-methoxyphenyl)-methane-sulfinic acid, and / or their salt(s), and / or their mixtures.

[0111] <15> The composition according to any of the preceding clauses characterized in that the one or more compound(s) according to group a) has the following structure:

[0112] With Ri having the same denotation as above. <16> The composition according to any of the preceding clauses characterized in that the one or more compound(s) according to group a) is / are 2-hydroxy-2- sulfinoacetic acid, and / or its salts.

[0113] <17> The composition according to any of the preceding clauses characterized in that the one or more compound(s) according to group a) is disodium-2-hydroxy-2- sulfinatoacetate.

[0114] <18> The composition according to any of the preceding clauses characterized in that the total concentration of one or more compound(s) according to group a) is in the range of 0.1 % to 50% by weight, preferably in the range of 0.25% to 40% by weight, more preferably in the range of 0.5% to 30% by weight, still more preferably in the range of 1 % to 20% by weight, still more preferably in the range of 3% to 12% by weight, calculated to the total weight of the composition.

[0115] <19> The composition according to any of the preceding clauses characterized in that the composition of the present invention comprises one or more sulfonic acid compound(s) according to the following general structure:

[0116] With the provision that R? is selected from H, NH4+or a metal cation, Rs is selected from OH, NR11R12 in which R11 and R12, which may be identical or different, are chosen from H or Ci-Ce alkyl, R9 is selected from H, alkyl, alkenyl, cycloalkyl or aryl which is / are unsubstituted or substituted by 1 to 3 identical or different substituents chosen from OH, Ci-Ce alkyl, O-Ci-Ce alkyl, halogen or CF3, R10 is chosen from a radical COOR7, SO3R7, COR11, CONR11R12 or COORn in which R7, R11 and R12 have the denotations as above, or R10 denotes H when R9 denotes an aryl group, in particular an aryl group substituted as described above, and / or their salt(s), and / or their mixtures, preferably one or more compound(s) according to group b) has the following structure:

[0117] R7O OH o=s - H inr o COOR7 With R? having the same denotation as above, more preferably one or more sulfonic acid compound is disodium-2-hydroxy-2-sulfonatoacetate.

[0118] <20> The composition according to clause <19> characterized in that the total concentration of sulfonic acid compound(s) is in the range of 0.1 % to 40% by weight, calculated to the total weight of the composition.

[0119] <21 > The composition according to any of the preceding clauses characterized in that the composition is an aqueous composition comprising water at 50% by weight or more, preferably at 60% by weight or more, still more preferably at 70% by weight or more, calculated to the total weight of the composition.

[0120] <21 > The composition according to any of the preceding clauses characterized in that the pH of the composition is in the range of 1 to 6, preferably in the range of 2 to 5, more preferably in the range of 2.5 to 4.5.

[0121] <22> The composition according to any of the preceding clauses characterized in that the composition further comprises one or more organic reducing agent(s) having at least one thiol group(s), and / or their salt(s), and / or their mixtures, as compound(s) according to group c), and preferably the molar ratio of compound(s) according to group a) to compound(s) according to group c) is in the range of 10:0.1 to 0.1 :10, preferably in the range of 3:1 to 1 :4, more preferably it is in the range of 1 .5:1 to 1 :1.5.

[0122] <23> The composition according to clause <22> characterized in that the one or more compound(s) according to group c) is / are cysteine, cystine, cysteamine, thioglycolic acid, thiolactic acid, and / or their salt(s), and / or their mixtures, preferably it is cysteine and / or its salt(s).

[0123] <24> The composition according to any of the preceding clauses characterized in that the composition further comprises one or more lipophilic compound being liquid at 25°C and atmospheric pressure as compound(s) according to group d), said compound(s) being preferably selected from from C12 to C22 fatty alcohols, esters of C3 to C22 alcohols with C12 to C22 fatty acids, Cs to C22 fatty acids, vegetable oils, and / or silicones, and / or hydrocarbon-based products, and / or their mixtures.

[0124] <25> The composition according to clause <24> characterized in that the one or more compound(s) according to group d) is / are linear or branched, saturated or unsaturated fatty alcohols with C12 to C22 alkyl or alkylene, optionally substituted with one or more hydroxy groups, said compound(s) are lauryl alcohol, tridecyl alcohol, myristyl alcohol, pentadecyl alcohol, cetyl alcohol, palmitoleyl alcohol, heptadecyl alcohol, stearyl alcohol, nonadecyl alcohol, arachidyl alcohol, behenyl alcohol, and / or their mixtures.

[0125] <25> The composition according to any of the clauses <23> to <24> characterized in that the one or more compound(s) according to group d) is / are are saturated or unsaturated fatty acids with or without substitution with hydroxy groups, preferably said compound(s) is / are myristoleic acid, palmitoleic acid, oleic acidlinoleic acid, arachidonic acid, and / or their mixtures.

[0126] <26> The composition according to any of the clauses <23> to <25> characterized in that the one or more compound(s) according to group d) is / are esters of C3 to C22 alcohols with C12 to C22 fatty acids, preferably said compounds are isopropyl palmitate, isopropyl myristate, octyl palmitate, isocetyl palmitate, octyl stearate, oleyl oleate, ethylhexyl hydroxystearate, myristyl myristate, behenyl behenate, and / or their mixtures.

[0127] <26> The composition according to any of the clauses <23> to <25> characterized in that the one or more compound(s) according to group d) is / are vegetable oils such as jojoba oil, avocado oil, sunflower seed oil, walnut oil, peanut oil, olive oil, rapeseed oil, cottonseed oil, palm oil, sesame oil, soybean oil, coconut oil, safflower oil, almond oil, macadamia nut oil, grapefruit seed oil, lemon kernel oil, orange kernel oil, apricot kernel oil, castor oil, and / or their mixtures.

[0128] <27 > The composition according to any of the clauses <23> to <26> characterized in that the one or more compound(s) according to group d) is / are petrolatum-based products are liquid paraffins, especially paraffinum perliquidum and paraffinum subliquidum, polydecenes, and mineral oil, in particular white mineral oil, and / or their mixtures.

[0129] <28> The composition according to any of the clauses <23> to <27> characterized in that the one or more compound(s) according to group d) is / are silicones such as dimethylpolysiloxanes, and modified silicones (for example, amino-modified silicones, fluorine-modified silicones, alcohol-modified silicones, polyether-modified silicones, epoxy-mod if ied silicones, or alkyl-modified silicones), but dimethylpolysiloxane, polyether-modified silicones and amino-modified silicones are preferred. Aminomodified silicones are commonly known under their CTFA name amodimethicone.

[0130] <29> The composition according to any of the clauses <23> to <28> characterized in that the one or more compound(s) according to group d) is cetearyl alcohol.

[0131] <30> The composition according to any of the clauses <23> to <29> characterized in that the total concentration of the one or more compound(s) according to group d), preferably the total concentration of C12 to C22 fatty alcohols, esters of C3 to C22 alcohols with C12 to C22 fatty acids, Cs to C22 fatty acids, vegetable oils, and / or silicones, and / or hydrocarbon-based products, and / or their mixtures, is in the range from 0.1 % to 25% by weight, preferably in the range of 0.25% to 20% by weight, more preferably in the range of 0.5% to 15% by weight, still more preferably in the range of 1 % to 10% by weight, calculated to the total weight of the composition.

[0132] <31 > The composition according to any of the preceding clauses characterized in that the composition further comprises one or more surfactant(s) as compound(s) according to group e), preferably one or more non-ionic, anionic, cationic or amphoteric / zwitterionic surfactant surfactant(s), and / or their salt(s), and / or their mixtures.

[0133] <32> The composition according to clause <31 > characterized in that the anionic surfactants are of the sulfate, sulfonate, carboxylate and alkyl phosphate type, for example, the known Cio-C -alkyl sulfates, and in particular the respective ether sulfates, for example, Ci2-Ci4-alkyl ether sulfate, lauryl ether sulfate, especially with 1 to 4 ethylene oxide groups in the molecule, monoglyceride (ether) sulfates, fatty acid amide sulfates obtained by ethoxylation and subsequent sulfatation of fatty acid alkanolamides, and the alkali salts thereof, as well as the salts of long-chain mono- and dialkyl phosphates.

[0134] <33> The composition according to any of the clauses <31 > to <32> characterized in that the anionic surfactants are alkyl sulphate surfactants, especially lauryl sulphate and / or its / their salts.

[0135] <34> The composition according to any of the clauses <31 > to <33> characterized in that the amphoteric / zwitterionic surfactants are betaines such as alkyl betaines, fatty 1 acid amidoalkyl betaines and sulfobetaines, for example, lauryl hydroxysulfobetaine; long-chain alkyl amino acids, such as cocoaminoacetate, cocoaminopropionate and sodium cocoamphopropionate and -acetate.

[0136] <35> The composition according to any of the clauses <31 > to <34> characterized in that the cationic surfactants are cetyl trimethyl ammonium chloride, stearyl trimonium chloride, dipalmitoyl dimonium chloride, distearyl dimethyl ammonium chloride, stearamidopropyl trimonuim chloride, dioleoylethyl dimethyl ammonium methosulfate, dioleoylethyl hydroxyethylmonium methosulfate.

[0137] <36> The composition according to any of the clauses <31 > to <35> characterized in that the one or more compound(s) according to group e) are nonionic surfactants, preferably long-chain fatty acid mono- and dialkanolamides, such as coco fatty acid mono- or diethanolamide and myristic fatty acid mono or diethanolamide, stearic acid mono or diethanolamide, alkyl polyglucosides with an alkyl group of 8 to 18 carbon atoms, and with 1 to 5 glucoside units, sorbitan esters, such as polyethylene glycol sorbitan stearic, palmitic, myristic and lauric acid esters, fatty acid polyglycol esters or poly-condensates of ethyleneoxide and propyleneoxide, as they are on the market, for example, under the trade name "PluronicsR", as well as ethoxylated fatty alcohols, C -C22-fatty alcohol ethoxylates, known by the generic terms "Laureth", "Myristeth", "Oleth", "Ceteth", "Deceth", "Steareth" and "Ceteareth" according to the CTFA nomenclature, including addition of the number of ethylene oxide molecules, e.g., "Laureth-16": with an average degree of ethoxylation between about 2.5 and about 100, preferably about 10 and about 30.

[0138] <37> The composition according to any of the clauses <31 > to <36> characterized in that the one or more non-ionic surfactant(s) according to group e) are selected from alkyl polyglycosides, ethoxylated triglycerides, ethoxylated fatty alcohols, ethoxylated fatty acid esters, and / or their mixtures, still more preferably said compound(s) are selected from ethoxylated C10-C22 fatty alcohols.

[0139] <38> The composition according to any of the clauses <31 > to <37> characterized in that the total concentration of the one or more compound(s) according to group e), preferably the total concentration of non-ionic surfactant(s), still more preferably the total concentration of ethoxylated C10-C22 fatty alcohols, is in the range from 0.1 % to 25% by weight, preferably in the range of 0.25% to 20% by weight, more preferably in the range of 0.5% to 15% by weight, still more preferably in the range of 1 % to 10% by weight, calculated to the total weight of the composition.

[0140] <39> The composition according to any of the preceding clauses characterized in that the composition is an emulsion, preferably an oil-in-water emulsion.

[0141] <40> The composition according to any of the clauses <1 > to <20> and <22> to <39> characterized in that the composition comprises water at 10% by weight or less, preferably at 1 % by weight or less, more preferably at 0.1 % by weight or less, calculated to the total weight of the composition, more preferably it is anhydrous.

[0142] <41 > The composition according to clause <40> characterized in that the total concentration of one or more compound(s) according to group a) is in the range of 1 % to 60% by weight, preferably in the range of 2% to 50% by weight, more preferably in the range of 3% to 45% by weight, still more preferably in the range of 5% to 45% by weight, calculated to the total weight of the composition.

[0143] <42> The composition according to any of the clauses <40> to <41 > characterized in that the total concentration of compound(s) according to any of the groups b1 ), b2), and b3) is in the range of 0.5% to 35% by weight, preferably in the range of 0.75% to 30% by weight, more preferably in the range of 1 % to 25% by weight, still more preferably in the range of 5% to 25% by weight, calculated to the total weight of the composition.

[0144] <43> The composition according to any of the clauses <40> to <42> characterized in that the total concentration of compound(s) according to a) and the compounds according to any of the groups b1 ), b2), and b3) is 40% by weight or more, preferably 50% by weight or more, more preferably 55% by weight or more, calculated to the total weight of the composition.

[0145] <44> The composition according to any of the clauses <40> to <43> characterized in that the total concentration of one or more compound(s) according to group c) is in the range of 1 % to 30% by weight, preferably in the range of 2% to 25% by weight, more preferably in the range of 5% to 20% by weight, still more preferably in the range of 10% to 20% by weight, calculated to the total weight of the composition.

[0146] <45> The composition according to any of the clauses <40> to <44> characterized in that the composition is a powder composition. <46> The composition according to clause <45> characterized in that the composition further comprises one or more pulverulent excipient as compound(s) according to group d), preferably one or more compound(s) according to group d) is cellulose, chemically modified cellulose fibers, lignin fibers, pectin fibers, natural starch(es), chemically modified starch(es), hydrolyzed natural starch(es), diatomaceous earth, kaolin, bentonite, nylon powder, montmorillonit, gypsum, sawdust and perlite, and / or their mixtures, more preferably one or more compound(s) according to group d) is a natural starch such as potato starch, rice starch, com starch, tapioca starch, wheat starch, and barley starch, and / or their mixtures.

[0147] <47> The composition according to any of the clauses <45> to <46> characterized in that the total concentration of one or more compound(s) according to group d) is 10% by weight, preferably 20% by weight, more preferably 30% by weight, calculated to the total weight of the composition.

[0148] <48> The composition according to any of the preceding clauses characterized in that the composition further comprises one or more additional reducing agent(s) different from the group(s) according to a) and c), preferably the one or more additional reducing agent(s) is ascorbic acid, and more preferably the total concentration of ascorbic acid is in the range of 0.1 % to 10% by weight, calculated to the total weight of the composition.

[0149] The present disclosure also related to a <49> a kit-of-parts for discoloring keratin fibers dyed with oxidative dyes and / or direct dyes, preferably human keratin fibers, more preferably human hair, comprising:

[0150] - a composition A comprising one or more compound(s) according to group a) as defined in any of the clauses <1 > to <48>,

[0151] - a composition B comprising one or more compound(s) according to groups b1 ), b2) and / or b3), and / or their mixtures, as defined in any of the clauses <1 > to <48>, wherein at least one of the compositions A and B is an aqueous composition.

[0152] <50> The kit according to clause <49> characterized in that composition B is an aqueous composition and comprises water at 50% by weight or more, preferably at 60% by weight or more, still more preferably at 70% by weight or more, calculated to the total weight of the composition B. <51 > The kit according to any of the clauses <49> to <50> characterized in that the total concentration of water in the compositions A is 10% by weight or less, preferably 1 % by weight or less, more preferably 0.1 % by weight or less, calculated to the total weight of compositions A, more preferably compositions A is an anhydrous composition.

[0153] <52> The kit according to any of the clauses <49> to <51 > characterized in that composition A is a powder composition.

[0154] <53> The kit according to any of the clauses <49> to <52> characterized in that the composition A further comprises one or more pulverulent excipient, said pulverulent excipient being preferably cellulose, chemically modified cellulose fibers, lignin fibers, pectin fibers, natural starch(es) such as potato starch, rice starch, com starch, tapioca starch, wheat starch, and barley starch, chemically modified starch(es), hydrolyzed natural starch(es), diatomaceous earth, kaolin, bentonite, nylon powder, montmorillonit, gypsum, sawdust and perlite, and / or their mixtures.

[0155] <54> The kit according to any of the clauses <49> to <53> characterized in that the composition A comprises the pulverulent excipient at 10% by weight or more, preferably at 20% by weight or more, more preferably at 30% by weight or more, calculated to the total weight of the composition A.

[0156] <55> The kit according to any of the clauses <49> to <54> characterized in that a ready-to-use compositions is obtainable by mixing the compositions A and B directly prior to the application onto keratin fibers.

[0157] The present disclosure is also directed to <56> a method for discoloring keratin fibers dyed with oxidative dyes and / or direct dyes, preferably human keratin fibers, more preferably human hair, comprising the following steps: i) providing the composition as defined in any of the clauses <1 > to <48> or mixing, dispersing and / or dissolving the compositions A and B as defined in any of the clauses <49> to <55> to yield an aqueous ready-to-use discoloring composition having a pH in the range of 1 to 9, then ii) applying the ready-to-use discoloring composition onto keratin fibers, then iii) leaving it for a time period in the range of 1 to 60 min, then iv) rinsing-off the ready-to-use discoloring composition with water and optionally drying the keratin fibers.

[0158] <57 > The method according to clause <56> characterized in that the pH of the ready- to-use discoloring composition of step i) is in the range of 1 to 7, more preferably in the range of 1.5 to 5.

[0159] <58> The method according to any of the clauses <56> to <57 > characterized in that the application time of step ii) is in the range of 2 min to 45 min, more preferably it is in the range of 5 min to 35 min, still more preferably it is in the range of 10 min to 30 min.

[0160] The following examples are to illustrate the present invention and not to limit it.

[0161] EXAMPLES

[0162] The following composition was prepared.

[0163] Inventive composition 1

[0164] % by weight

[0165] Disodium-2-hydroxy-2-sulfinatoacetate 3.0

[0166] Bentonite clay 4.0

[0167] Cysteine HCI • 1 H2O 3.0

[0168] NaOH / HCI add pH 3.0

[0169] Water add 100.0

[0170] The viscosity of the composition was 4,320 mPas measured with a Brookfield viscometer spindle #5 at 25°C.

[0171] The following results on dyed keratin fibers were obtained:

[0172] Table 1

[0173] Table 2

[0174] The following compositions were prepared. The viscosity of the inventive and comparative compositions above were 19,000 ± 1 ,200 mPas, measured with a Brookfield viscometer spindle #5 at 25°C.

[0175] The following results on dyed keratin fibers were obtained:

[0176] Table 3 The inventive compositions comprising bentonite clay yielded a higher degree of discoloration upon application onto dyed keratin fibers in comparison to the comparative composition comprising xanthan gum.

[0177] Table 4

[0178] The following compositions were prepared.

[0179] The following results on dyed keratin fibers were obtained: Table 5

[0180] The inventive compositions comprising the divalent metal salt or oxide yielded a higher degree of discoloration upon application onto dyed keratin fibers in comparison to the comparative composition comprising no such salt.

[0181] Table 6

[0182] The following compositions were prepared.

[0183] The following results on dyed keratin fibers were obtained: Table 7

[0184] The inventive compositions comprising the divalent metal salt or oxide yielded a higher degree of discoloration upon application onto dyed keratin fibers in comparison to the comparative composition comprising no such salt.

[0185] Methods

[0186] Coloring and decoloring

[0187] L*i, a*i, b*i values of Yak hair streaks (21 cm long, 2 g per bundle) were measured with a Datacolor 45 spectrometer. The hair streaks were shampooed with a commercially available shampoo under the brand name Goldwell Dualsenses Scalp Specialist Deep Cleansing Shampoo.

[0188] The following commercially available dyeing compositions were used:

[0189] Goldwell Topchic 6N corresponded to dyeing composition #1 . It comprised the following oxidative dyes: Toluene-2,5-diamine sulfate, 4-Chlororesorcinol, Resorcinol, m-Aminophenol, 4-Amino-2-Hydroxytoluene.

[0190] Goldwell Topchic 6SB corresponded to dyeing composition #2. It comprised the following oxidative and direct dyes: Toluene-2,5-diamine sulfate, Resorcinol, 1 ,3-Bis- (2,4-Diaminophenoxy) propane HCI, m-Aminophenol, HC Yellow No. 2.

[0191] The dye compositions #1 -2 were mixed with an oxidizing composition comprising hydrogen peroxide at 6% by weight in a weight ratio of 1 :1 . The hair streaks were dyed for 30 min at 40°C, then the streaks were rinsed-off with water, shampooed and blow-dried. L*2, a*2, b*2 values were measured with a Datacolor 45 spectrometer. AE*ab color was calculated as follows:

[0192] For bleaching / discoloring the hair streaks, the 2 g of the compositions from above were applied onto the dyed hair streaks and left for 30 min at 40°C. The streaks were then rinsed-off with water, shampooed and blow-dried. L*3, a*3, b*3 values were measured. AE*ab discolored and % discolored was calculated according to the following formula:

[0193] Viscosity

[0194] 50 g of each of the compositions above were filled into the sample chamber of a Brookfield DV-I viscometer, allowed to temperate to 25°C for 10 min, and then sheared for 1 min with spindle #5. The reported values are constant end values after 2 min measurement time.

Claims

Claims1 . A composition for discoloring keratin fibers dyed with oxidative dyes and / or direct dyes, preferably human keratin fibers, more preferably human hair, comprising: a) one or more organic sulfinic acid(s), and / or their salt(s), and / or their mixtures,- one or more compounds selected from the following groups: b1 ) one or more inorganic thickening agent(s) selected from clay minerals, b2) one or more salt(s) of a divalent or trivalent metal cation(s) selected from zinc salts, magnesium salts, iron salts, copper salts, manganese salts, cobalt salts, and aluminium salts, and b3) one or more oxide(s) of a divalent or trivalent metal cation(s) selected from zinc oxides, magnesium oxides, iron oxides, copper oxides, manganese oxides, cobalt oxides, and aluminium oxides, and / or their mixtures.

2. The composition according to claim 1 characterized in that one or more compound(s) according to group a) have the following general structure:With the provision that Ri is selected from H, NH4+or a metal cation, R2 is selected from OH, NR5R6 in which R5 and Re, which may be identical or different, are chosen from H or Ci-Ce alkyl, R3 is selected from H, alkyl, alkenyl, cycloalkyl or aryl which is / are unsubstituted or substituted by 1 to 3 identical or different substituents chosen from OH, Ci-Ce alkyl, O-Ci-Ce alkyl, halogen or CF3, R4 is chosen from a radical COOR1, SO3R1, CORs, CONR5R6 or COORs in which R1, R5, and Re have the denotations as above, or R4 denotes H in case R3 denotes an aryl group, in particular an aryl group substituted as described above, and / or their salt(s), and / or their mixtures, preferably one or more compound(s) according to group a) has the following structure:With Ri having the same denotation as above, more preferably one or more compound(s) according to group a) is disodium-2-hydroxy-2-sulfinatoacetate.

3. The composition according to any of the preceding claims characterized in that the total concentration of one or more compound(s) according to group a) is in the range of 0.1 % to 50% by weight, preferably in the range of 0.25% to 40% by weight, more preferably in the range of 0.5% to 30% by weight, still more preferably in the range of 1 % to 20% by weight, still more preferably in the range of 3% to 12% by weight, calculated to the total weight of the composition.

4. The composition according to any of the preceding claims characterized in that the one or more compound(s) according to group b1) is / are smectite clay minerals, preferably they are smectite clay minerals of natural origin or synthetic clay minerals, furthermore preferably they are hectorite(s), bentonite(s), kaolin(s), montmomlite(s), and / or their mixtures.

5. The composition according to any of the preceding claims characterized in that the one or more compound(s) according to group b2) is / are zinc chloride, zinc sulfate, magnesium chloride, magnesium sulfate, iron (II) chloride, iron (II) sulfate, copper chloride, copper sulfate, manganese chloride, manganese sulfate, cobalt chloride, cobalt sulfate, aluminium chloride, aluminium sulfate, and / or their mixtures, more preferably said compounds are zinc chloride, zinc sulfate, and aluminium chloride, and / or their mixtures, more preferably said compound is zinc chloride.

6. The composition according to any of the preceding claims characterized in that the one or more compound(s) according to group b3) is / are zinc oxides or aluminium oxides, and / or their mixtures, preferably said compounds are zinc oxides, and / or their mixtures.

7. The composition according to any of the preceding claims characterized in that the total concentration of compound(s) according to any of the groups b1 ), b2), and b3) is in the range of 0.1 % to 50% by weight, preferably 0.25% to 40% by weight, more preferably in the range of 0.5% to 30% by weight, more preferably in the range of 1 %to 20% by weight, still more preferably in the range of 1 % to 6% by weight, calculated to the total weight of the composition.

8. The composition according to any of the preceding claims characterized in that it is an aqueous composition comprising water at 50% by weight or more, preferably at 60% by weight or more, still more preferably at 70% by weight or more, calculated to the total weight of the composition, and preferably having a pH in the range of 1 to 6, more preferably in the range of 2 to 5, still more preferably in the range of 2.5 to 4.5.

9. The composition according to any of the preceding claims characterized in that the composition comprises one or more organic reducing agent(s) having at least one thiol group(s), and / or their salt(s), and / or their mixtures, preferably the compositions comprises one or more cysteine, cystine, cysteamine, thioglycolic acid, thiolactic acid, and / or their salt(s), and / or their mixtures, more preferably the compositions comprises cysteine and / or its salt(s), as compound(s) according to group c), and preferably the molar ratio of compound(s) according to group a) to compound(s) according to group c) is in the range of 10:0.1 to 0.1 :10, preferably in the range of 3:1 to 1 :4, more preferably it is in the range of 1.5:1 to 1 :1.5.

10. The composition according to any of the preceding claims characterized in that the viscosity of the composition of the present invention is in the range of1 ,000 mPas to 50,000 mPas, preferably in the range of 2,500 mPas to 30,000 mPas, more preferably in the range of 3,500 mPas to 25,000 mPas, measured with a Brookfield viscometer spindle #5 at 25°C.11 . The composition according to any of the preceding claims characterized in that the composition comprises one or more lipophilic compound being liquid at 25°C and atmospheric pressure as compound(s) according to group d), said compound(s) being preferably selected from from C12 to C22 fatty alcohols, esters of C3 to C22 alcohols with C12 to C22 fatty acids, Cs to C22 fatty acids, vegetable oils, and / or silicones, and / or hydrocarbon-based products, and / or their mixtures, more preferably said compound(s) are selected from myristyl alcohol, cetyl alcohol, stearyl alcohol, behenyl alcohol, cetearyl alcohol, isopropyl palmitate, isopropyl myristate, octyl palmitate, isocetyl palmitate, octyl stearate, oleyl oleate, ethylhexyl hydroxystearate, myristyl myristate, behenyl behenate, oleic acid, linoleic acid, palmitic acid, mineral oil, paraffinum perliquidium, paraffinum subliquidum, polydecenes, jojoba oil,avocado oil, sunflower seed oil, walnut oil, peanut oil, olive oil, rapeseed oil, cottonseed oil, palm oil, sesame oil, soybean oil, coconut oil, safflower oil, almond oil, macadamia nut oil, grapefruit seed oil, lemon kernel oil, orange kernel oil, apricot kernel oil, castor oil, and / or their mixtures, still more preferably said compound(s) is selected from cetearyl alcohol, preferably the total concentration of one or more compound(s) according to group d), more preferably the total concentration of C12 to C22 fatty alcohols, esters of C3 to C22 alcohols with C12 to C22 fatty acids, Cs to C22 fatty acids, vegetable oils, and / or silicones, and / or hydrocarbon-based products, and / or their mixtures, is in the range from 0.1 % to 25% by weight, preferably in the range of 0.25% to 20% by weight, more preferably in the range of 0.5% to 15% by weight, still more preferably in the range of 1 % to 10% by weight, calculated to the total weight of the composition.

12. The composition according to any of the preceding claims characterized in that the composition comprises one or more surfactant(s) as compound(s) according to group e), preferably one or more non-ionic, anionic, cationic or amphoteric / zwitterionic surfactant surfactant(s), and / or their salt(s), and / or their mixtures, more preferably one or more non-ionic surfactant(s), said one or more nonionic surfactant(s) being preferably selected from alkyl (poly)-glycosides, ethoxylated triglycerides, ethoxylated C10-C22 fatty alcohols, ethoxylated fatty acid esters, and / or their mixtures, still more preferably said compound(s) are selected from ethoxylated fatty alcohols, and preferably the total concentration of one or more compound(s) according to group e), preferably the total concentration of non-ionic surfactant(s), still more preferably the total concentration of ethoxylated fatty alcohols, is in the range from 0.1 % to 25% by weight, preferably in the range of 0.25% to 20% by weight, more preferably in the range of 0.5% to 15% by weight, still more preferably in the range of 1 % to 10% by weight, calculated to the total weight of the composition.

13. The composition according to any of the preceding claims characterized in that it is an emulsion, preferably an oil-in-water emulsion.

14. A kit-of-parts for discoloring keratin fibers dyed with oxidative dyes and / or direct dyes, preferably human keratin fibers, more preferably human hair, comprising:- a composition A comprising one or more compound(s) according to group a) as defined in any of the claims 1 to 13,- a composition B comprising one or more compound(s) according to groups b1 ), b2), b3), and / or their mixtures, as defined in any of the claims 1 to 13, wherein at least one of the compositions A and B is an aqueous composition.

15. A method for discoloring keratin fibers dyed with oxidative dyes and / or direct dyes, preferably human keratin fibers, more preferably human hair, comprising the following steps: i) providing the composition as defined in any of the claims 1 to 13 or mixing, dispersing and / or dissolving the compositions A and B as defined in claim 14 to yield an aqueous ready-to-use discoloring composition having a pH in the range of 1 to 9, then ii) applying the ready-to-use discoloring composition onto keratin fibers, then iii) leaving it for a time period in the range of 1 to 60 min, then iv) rinsing-off the ready-to-use discoloring composition with water and optionally drying the keratin fibers.