Abstract: Disclosed are compounds of formula (1a), wherein R1 is N+R8R9; R8 and/or R9 independently from each other are hydrogen; C1-C12alkyl; or phenyl-C1-C4-alkyl; or R8 and/or R9 are a bivalent C3-C6alkylene radical which is linked to the carbon atoms C1 or C2 respectively and, together with the linking nitrogen atom form a 6 to 16-membered carbocyclic ring; R2 is NR10R11; or OR10; R10 and R11, independently from each other are hydrogen; C1-C12alkyl; or phenyl-C1-C4alkyl; or R10 and/or R11 are a bivalent C3-C6alkylene radical which is linked to the carbon atoms C3 or C4 respectively and, together with the linking nitrogen or oxygen atom form a 6 to 16-membered carbocyclic ring; or R10 and R11 together with the linking nitrogen atom form a 4 to 8 membered carbocyclic ring; R3, R4, R5, R6 and R7 independently form each other are hydrogen; C1-C12alkyl; halogen; NR12R13; or a radical of formula (1a); R12 and R13 independently from each other are hydrogen; C1-C12alkyl; phenyl-C1-C4alkyl; or a radical of formula (1a2); V

Abstract: The invention relates to an agent for dying fibers comprising keratin, particularly human hair, the agent comprising at least one compound of the formula: together with at least one CH-acidic compound. The invention also relates to methods for shading oxidation dyed fibers, methods for freshening up fibers, methods for making an agent for dyeing fibers and to various compositions.

Abstract: The present disclosure relates to a composition for dyeing keratin fibers, comprising at least one direct dye, at least one bioheteropolysaccharide, at least one cationic surfactant and at least one amphoteric or non-ionic surfactant. Such a composition makes it possible to obtain compositions that allow intense and relatively nonselective shades to be obtained, leaving the hair with good cosmetic properties.

Abstract: Disclosed herein is a composition for the non-oxidizing aqueous direct dyeing of keratin materials, for example, human keratin fibers, such as the hair, comprising, in a cosmetically acceptable medium: (a) at least one water-soluble direct dye, and (b) at least one water-insoluble non-coloring oxygenated organic compound, present in an amount of at least 30% by weight relative to the total weight of the composition. Also disclosed herein is a process for direct dyeing keratin fibers comprising applying said composition to the fibers.

Abstract: Disclosed are compounds of formula D is an aromatic or a cationic heteroaromatic group, which is optionally substituted by C1-C14alkyl, C1-C14alkoxy, hydroxy-C1-C14alkyl, C3-C8cycloalkyl, —CN, NO2, —NR3R4, halogen, C6-C10aryl, which is optionally substituted or C1-C14alkyl, or by one or more groups Z; E1 and E2 independently from each other are ?CH; or ?N—; K is an aromatic or heteroaromatic group which is optionally substituted by C1-C14alkyl, C1-C14alkoxy, C3-C8cycloalkyl, C6-C10aryl, halogen, hydroxy, NO2, —NR3R4, —N(R3)(CO)R4, —SO2NR1R2, —SONR1R2 or by one or more Z; or a radical of formula —NR1R2; R1 and R2 independently from each other are hydrogen; C1-C14alkyl; cyclo-C1-C14alkyl; C6-C10aryl; an aromatic or heteroaromatic group which is optionally substituted by C1-C14alkyl, C1-C14alkoxy, C3-C8cycloalkyl, C6-C10aryl, halogen, hydroxy, —NR5R6, —N(R5)—(CO)R5 or by Z; Z is a group of the formula (1a) *—X1—Y1—W1, wherein X1 is the direct bond; —NR7—; —O—; —NR7(C?O)—; —(CO)NR7—; —O(C?O)—; —(CO)O—; or —

Abstract: The present invention relates to a process for treating keratin fibres, which comprises the application to the keratin fibres of a hair composition comprising at least one active agent chosen from hair dyes, oxidizing agents and cationic conditioners, followed by the application to the fibres of a heating iron whose temperature is greater than or equal to 60° C. The invention also relates to a composition comprising at least one superabsorbent polymer and at least-one active agent chosen from hair dyes, oxidizing agents and cationic conditioners.

Abstract: The subject of the present invention is the use, for dyeing in particular human keratin materials, of a specific direct azomethine dye, by dry thermal transfer. Its subject is furthermore a method for dyeing keratin materials, in which at least one direct azomethine dye contained in a dry composition, is applied to or close to the keratin materials, and a source of heat is applied, causing the thermal transfer of the direct dye(s) at the surface and/or inside the keratin materials. It relates furthermore to the dry composition and a method for preparing it.

Abstract: Disclosed are styryl sulfide dyes of formula (1), wherein R1, R?1, R2, R?2, R3 and R?3, independently from each other are hydrogen; C1-C20alkyl or C1-C20alkoxy, which may be substituted by one or more C1-C5alkoxy, halogen, —NH2, mono-C1-C5alkylamino, di-C1-C5alkylamino, —NO2 or hydroxy; C3-C6cycloalkyl; —C(O)H; —C(O)—C1-C5alkyl; halogen; NO2; OH; phenyl, which may be substituted by one or more C1-C5alkyl, C1-C5alkoxy, halogen, —NH2, mono-C1-C5alkylamino, di-C1-C5alkylamino, —NO2 or hydroxy; or a radical of formula —NR4R5, wherein R4 and R5 independently from each other are hydrogen; C1-C12alkyl, which may be substituted by one or more C1-C5alkyl, C1-C5-alkoxy, hydroxy or —(CO)—H; —(CO)—C1-C5alkyl; phenyl or phenyl-C1-C4alkyl, wherein the phenyl moiety may be substituted by one or more C1-C5alkyl, C1-C5alkoxy, halogen, —N2, mono-C1-C5alkylamino, di-C1-C5alkylamino, —NO2, carboxy or hydroxy; W1, W?1, W2, W?2, W3, W?3, W4 or W?4, independently from each other are —CH— or —N+—; wherein only one of W1/W?1, W2/W?2,

Abstract: One subject of the present invention is monocationic monochromophoric compounds of formula (I) and/or (II) below: in which: R1 represents a hydrogen or an alkyl, phenyl, benzyl, alkylcarbonyl, alkylsulphonyl, aminosulphonyl or aminocarbonyl radical; R5 represents an alkyl, phenyl or benzyl radical; R2 and R3, represent a halogen or an alkyl, aryloxy, arylamino, hydroxyl, alkoxy, (poly)hydroxyalkoxy, alkoxycarbonyl, alkylcarbonyloxy, amino, alkylcarbonylamino, aminocarbonyl, ureido, aminosulphonyl, alkylthio, alkylsulphonylamino, cyano, trifluoromethyl, thio, alkylsulphinyl or alkylsulphonyl radical; R4 represents a hydrogen or an alkyl, amino, alkylcarbonylamino, ureido, alkylsulphonylamino, hydroxycarbonyl, alkoxycarbonyl, cyano, phenyl or benzyl radical; R6 and R7, represent a hydrogen or an alkyl, alkylcarbonyl, alkoxycarbonyl, alkoxyaryl, aminoaryl, aminocarbonyl or alkylsulphonyl radical; and n is between 0 and 4, n? is between 0 and 4, the electroneutrality of the compounds of formulae (I) and (II)

Abstract: Present invention is related to oxidative hair coloring composition comprising yogurt powder for improving combability of hair.

Abstract: The present disclosure relates to a cosmetic composition comprising at least one fluorescent dye and at least one aminosilicone; processes using this cosmetic composition and a kit comprising at least one composition comprising at least one fluorescent dye and at least one aminosilicone, which can be used to dye with a lightening effect human keratin materials for example, artificially dyed or pigmented hair, and dark skin.

Abstract: The invention relates to a composition for dyeing human keratin fibers, comprising, in a cosmetically acceptable medium, one or more cationic direct dyes comprising at least one carbon-carbon triple bond, for instance dyes of formula (I), (II) or (III) below: in which A1, A2 and A3, independently of each other, correspond to a cationic heterocyclic group and B1, B2 and B3, independently of each other, correspond to a particular aromatic nucleus; n may be equal to 1 or 2.

Abstract: The present disclosure relates to a substantially dry cosmetic article for dyeing keratin materials, comprising a porous flexible substrate, and at least one direct dyes and/or direct dye precursor in powder form, which are capable of dyeing the keratin material via heat transfer, the substrate and the direct dyes or direct dye precursors being non-covalently bonded to the substrate. Disclosed herein is also a method for dyeing keratin materials, for example, human keratin materials, via dry heat transfer, using the dry heat-transfer cosmetic article.

Abstract: Disclosed are compounds of formula (1a), wherein R1 is N+R8R9; R8 and/or R9 independently from each other are hydrogen; C1-C12alkyl; or phenyl-C1-C4-alkyl; or R8 and/or R9 are a bivalent C3-C6alkylene radical which is linked to the carbon atoms C1 or C2 respectively and, together with the linking nitrogen atom form a 6 to 16-membered carbocyclic ring; R2 is NR10R11; or OR10; R10 and R11, independently from each other are hydrogen; C1-C12alkyl; or phenyl-C1-C4alkyl; or R10 and/or R11 are a bivalent C3-C6alkylene radical which is linked to the carbon atoms C3 or C4 respectively and, together with the linking nitrogen or oxygen atom form a 6 to 16-membered carbocyclic ring; or R10 and R11 together with the linking nitrogen atom form a 4 to 8 membered carbocyclic ring; R3, R4, R5, R6 and R7 independently form each other are hydrogen; C1-C12alkyl; halogen; NR12R13; or a radical of formula (1a); R12 and R13 independently from each other are hydrogen; C1-C12alkyl; phenyl-C1-C4alkyl; or a radical of formula (1a2); V

Abstract: Disclosed are oxazine disulfide dyes of formula (1) D1-(Z1)r-Y1—S-A, wherein A is hydrogen; or a radical of formula (1a)*—S—Y2-(Z2)r-D2; Y1 and Y2 independently from each other are unsubstituted or substituted, straight-chain or branched, interrupted or uninterrupted C—1—C—10alkylene; C5-C10cycloalkylene; C5-C10arylene; or —C5-C10arylene-(C1-C10alkylene); Z1 and Z2 independently from each other are *—(CH2)p—C(O)—**; *—(CH2CH2—O)S—**; *—(CH2)p—C(O)O—**; *—(CH2)p—OCO—**; *—(CH2)P—N(R1)—**; formula 1(g); —(CH2)p—CON(R1)—**; *—(CH2)p—(R1)NC(O)—**; , 0-; —S—; —S(O)—; —S(O)2—; or a cationic biradical of a substituted or unsubstituted aromatic or heteroaromatic compound of the formula (1a); (1b); (1c); (1d); or (1e); wherein the asterix * indicates the linkage to D1 and/or D2; the asterix ** indicates the linkage to Y1 and/or Y2; W1 is N or a radical of CR5; R1, R2, R3, R4 and R5 independently from each other are hydrogen; C1-C14alkyl; C2-C14alkenyl; C5-C10aryl; C5-C10aryl-(C1-C10alkyl); or —C1-C10alkyl(C5-C10aryl);

Abstract: The present invention relates to compositions for dyeing keratin fibers, and in particular human keratin fibers such as the hair, comprising at least one compound of styryl or imine type containing a heterocycle and at least one thiol compound. The present invention makes it possible in particular to obtain a chromatic and fast coloration of keratin fibers, especially with respect to shampooing. Moreover, the color obtained is visible even on dark hair without necessarily using an oxidizing composition. The invention also makes it possible to obtain a coloration which, under certain conditions, does not stain.

Abstract: Disclosed herein is a mixed cationic direct dye comprising at least one anthraquinone chromophore and at least one cationic chromophore chosen from cationic azo chromophores and cationic hydrazone chromophores, wherein the at least one anthraquinone chromophore is bound to the at least one cationic chromophore by means of at least one linkage. Also disclosed herein is a dyeing composition comprising at least one mixed cationic direct dye. Further disclosed herein is a method of dyeing of keratin fibers, for example, keratin fibers, comprising applying said dyeing composition to the keratin fibers. Still further disclosed herein is a multi-compartment kit comprising at least one compartment comprising at least one dye composition and at least one second compartment comprising at least one oxidizing agent.

Abstract: A shampoo coloring formulation for human hair having the following ingredients; (a) cationic dye; (b) sodium lauroyl sarcosinate; (c) lauramidopropyl betaine; (d) cocamido propylamine oxide; (e) lauramide MEA and (f) water.

Abstract: A subject-matter of the present invention is the use, in the direct dyeing of keratinous fibers, of at least one direct dye and of a specific cationic hydrotropic agent of formula: in which X represents CH or N+R6 with R6 representing a C1-C10 alkyl, R1 represents either a hydrogen or a C1-C10 alkyl, if X represents N+R6, or (CH2)nN+R3R4R5 with R3, R4 and R5, which are identical or different, representing a C1-C10 alkyl and n representing an integer between 0 and 12, if X represents CH; R2 represents a C1-C4 alkyl; p has a value 0 or 1; the electrical neutrality of the compound being provided by a cosmetically acceptable anion or a mixture of cosmetically acceptable anions. The invention likewise relates to a dyeing composition comprising at least one dye and such a cationic hydrotrope and to colouring processes employing this dyeing composition.

Abstract: The disclosure relates to the dyeing of keratin materials using styryl hydroxy(cyclo)alkylamino thiol/disulfide fluorescent dyes. Disclosed herein is a dye composition comprising a styryl hydroxy(cyclo)alkylamino thiol/disulfide fluorescent dye and a dyeing process with, for example, a lightening effect on keratin materials such as hair, using said composition. Disclosed herein are novel thiol/disulfide fluorescent dyes and the uses thereof in lightening keratin materials. This composition makes it possible to obtain a lightening effect which can be resistant and visible on dark keratin fibers.

Abstract: The present invention has for an object brightening cationic naphthalene dyes of formula (I) and colorants for keratin fibers, particularly human hair, containing these compounds

Abstract: Compositions suitable for treating keratin fibers, which compositions comprise: (a) a protein from a seed of a plant of the Moringa genus; (b) a color-modifying active ingredient; and (c) a cosmetically-acceptable carrier component are disclosed along with methods of using and making the same.

Abstract: Disclosed are triarylmethane dyes of formula (1) D1-(Z1J)r-Y1—S-A, wherein A is hydrogen; a radical of formula (1b) *—S—Y2-(Z2)-D2; or a radical of formula (1c) *—S—Y3; Y1 and Y2 independently from each other are unsubstituted or substituted, straight-chain or branched, interrupted or uninterrupted C1-C10alkylene; C5-C10cycloalkylene; C5-C10arylene; or —C5-C10arylene-(C1-C10alkylene); Y3 is an unsubstituted or substituted, straight-chain or branched, interrupted or uninterrupted C1C10alkyl; C5-C10cycloalkyl; C5-C10aryl; or —C5-C10aryl-(C1-C10alkyl); Z1 and Z2 independently from each other are *—(CH2)p—C(O)—**; *—(CH2CH2—O)—**; *—(CH2)p—C(O)O—**; *—(CH2)p—OCO—**; —(CH2)p—N(R1)—**; —(CH2)p—CON(R1)—**; —(CH2)p—(R1)NC(O)—**; -0-; —S—; —S(O)—; —S(O)2—; or a cationic biradical of a substituted or unsubstituted aromatic or heteroaromatic compound of the formula (1a); (1b); (1c); (1d); or (1e); wherein the asterix * indicates the linkage to D1 and/or D2; the asterix ** indicates the linkage to Y1 and/or Y2; W1 is N o

Abstract: The present application relates to cationic pyrazolone dyes of the general formula (I), and to coloring agents for keratin fibers comprising these dyes.

Abstract: The present invention relates to a process for dyeing keratin fibers, in particular human keratin fibers such as the hair, using a dye composition comprising at least one dye of styryl or imine type in the presence of a revealing composition comprising at least one optionally substituted (hetero) aromatic compound of weak acid type. The present invention makes it possible in particular to obtain a chromatic and fast coloration of keratin fibers, which is visible even on dark hair without prior lightening. The invention also makes it possible to obtain a coloration which, under certain conditions, does not stain.

Abstract: Cationic naphthyldiazo dyes of general formula (I) and colorants for keratin fibers containing these dyes.

Abstract: The present invention relates to agents for coloring keratin fibers which comprise at least one zwitterionic azomethine dye of the general formula (I), (II), or (III) in which z is a heterocycle of the formula in which R8 is an alkyl sulfonate radical of the formula (XIII);

Abstract: The invention relates to a composition for dyeing keratinous fibers, in particular human keratinous fibers such as hair, comprising, in an appropriate dyeing medium, at least one cationic direct dye of a given formula, and which is characterized in that it contains, in addition, at least one silicone chosen from the aminated silicones, the polyoxyalkylenated silicones, the silicone gums and resins. The invention also relates to the dyeing methods and devices using it.

Abstract: Provided is a hair dye composition containing a dissociative direct dye (1): (wherein Ar represents an aromatic group or heterocyclic aromatic group which may have a substituent, Ar? represents an aromatic group which may be substituted by an alkyl group or an electron drawing group, or a specific heterocyclic aromatic group, and W represents an electron drawing group); or salt thereof.

Abstract: The present invention is related to an aqueous colouring composition for keratin fibres especially human hair based on hair direct dyes and optionally oxidative dyes and comprising at least one arylated silicone.

Abstract: Disclosed herein is a dyeing composition comprising a particular disulphide dye and a method of dyeing human keratin fibers, such as hair, using this composition. This composition makes it possible to obtain particularly fast chromatic colorations.

Abstract: The invention relates to a dye composition for keratin fibers, in particular for human keratin fibers such as the hair, this composition having, in a medium suitable for dyeing, at least one cationic direct dye of given formula, and containing at least one specific cationic or amphoteric substantive polymer. The invention also relates to the dyeing processes and devices using it.

Abstract: The present invention relates to a method of hair coloring and bleaching compositions providing a composition comprising i) at least one source of peroxymonocarbonate ions, ii) at least one alkalizing agent, preferably a source of ammonium ions, and iii) at least one radical scavenger, wherein said composition has a pH of up to 9.5, and applying the composition to the hair and retaining on the hair for a period of less than 20 minutes, which provide a high level of lift and lightening and the required dye deposition and grey coverage whilst reducing the concentration of peroxide, the ammonia odor and reducing the hair fiber damage.

Abstract: The present disclosure relates to a composition for dyeing human keratin fibers, comprising at least one cationic direct dye of formula (I), described herein, and at least one cosmetic agent chosen from thickening agents and surfactants. Also disclosed herein is a dyeing process comprising applying a composition of the present disclosure to keratin fibers, in the presence or absence of an oxidizing agent. Further disclosed herein is a multi-compartment device comprising at least one first compartment containing a dye composition of the present disclosure and at least one second compartment containing at least one oxidizing composition.

Abstract: The invention relates to a coloring composition for depositing colors to a keratin-containing substrate, said composition comprising: (a) one or more acid dyes; and (b) one or more cationic quaternary ammonium compounds, said quaternary ammonium compound being present in an amount which provides conditioning benefits but which is insufficient to interfere with deposition of said dye on said substrate.

Abstract: This invention relates to compositions containing pigments or other benefit agents in particulate form may be combined with a quaternary ammonium compound that can effectuate adsorption to anionic substrates, methods of making such compositions and methods of their use.

Abstract: A hair dye composition containing an azo dye (1) or a salt thereof: wherein R represents a coupler moiety, R1 and R3 each independently represent —SO3M, —SO2NR4R5 or a hydrogen atom, R2, R4 and R5 each independently represent a hydrogen atom or a substituent, and M represents a hydrogen atom, metal atom or ammonium, with a proviso that R1 and R3 are not hydrogen atoms at the same time.

Abstract: Formula (I) wherein R1 and R2 each independently from each other are a residue of an organic dye: Y1 and Y2 each independently from each other are unsubstituted or substituted, straightchain or branched, interrupted or uninterrupted —C1-C10alkylene-; —C5-C10cycloalkylene-; C5-C10arylene; or —C5-C10arylene-(C1-C10alkylene)-; Z1 and Z2 independently from each other are Formula (II) are each independently from each other hydrogen; or unsubstituted or substituted, straight-chain or branched, mono-cyclic or polycyclic, interrupted or uninterrupted C1-C14alkyl; C2-C14alkenyl; C6-C10aryl; C6-C10aryl-C1-C10alkyl; or C5-C10alkyl(C5-C10aryl); r, q and n independently from each other are 0 or 1, if n is 0, Z3 is hydrogen; and if n is 1, Z3 is —S—: with the proviso that the method does not comprise treating the fiber with an enzyme of the type of a protein disulfidisomerase (EC 5.3.4.1).

Abstract: The present invention relates to an oxidative hair colouring and bleaching composition comprising an oxidizing agent, a source of carbonate ions, an alkalising agent, and preformed dyes, utilised at pH 9.5 and below which improved colour delivery, intensity and vibrancy, which are compatible with current dyes and dye precursor systems. Moreover, the compositions of the present invention also exhibit low odour and deliver a high level of lift and lightening equal to the currently utilised ammonia/peroxide systems, whilst reducing the concentration of peroxide and reducing the hair fibre damage.

Abstract: The present disclosure relates to a composition for dyeing keratin fibers, comprising at least one direct dye, at least one bioheteropolysaccharide, at least one cationic surfactant and at least one amphoteric or non-ionic surfactant. Such a composition makes it possible to obtain compositions that allow intense and relatively nonselective shades to be obtained, leaving the hair with good cosmetic properties.

Abstract: Formula (I) wherein R1 and R2 each independently from each other are a residue of an organic dye: Y1 and Y2 each independently from each other are unsubstituted or substituted, straightchain or branched, interrupted or uninterrupted —C1-C10alkylene-; —C5-C10cycloalkylene-; C5-C10arylene; or —C5-C10arylene-(C1C10alkylene)-; Z1 and Z2 independently from each other are Formula (II) are each independently from each other hydrogen; or unsubstituted or substituted, straight-chain or branched, monocyclic or polycyclic, interrupted or uninterrupted C1-C14alkyl; C2-C14alkenyl; C6-C10aryl; C6-C10aryl-C1-C10alkyl; or C5-C10alkyl(C5-C10aryl); r, q and n independently from each other are 0 or 1, if n is 0, Z3 is hydrogen; and if n is 1, Z3 is —S—; with the proviso that the method does not comprise treating the fiber with an enzyme of the type of a protein disulfidisomerase (EC 5.3.4.1).

Abstract: The present invention relates to a process for dyeing keratin fibres, which comprises the application to the fibres of a composition containing at least one cationic polymer, rinsing of the keratin fibres, the application of a composition containing at least one anionic coloured polymer, and rinsing of the keratin fibres. Such a process makes it possible to obtain an improvement in the coloration of the keratin fibres.

Abstract: A composition, kit and process for dyeing hair fibers in a manner which inhibits color loss during subsequent shampooing involving contacting the hair fibers with a composition containing: (a) at least one polyamine having at least two amino groups; (b) at least one anionic silicone; and (c) at least one dye component chosen from a direct dye and an oxidation dye, and wherein the dyed hair fibers inhibit color loss resulting from subsequent shampooing of the dyed hair fibers.

Abstract: The present invention has for an object agents for coloring keratin fibers and containing at least one indolylthiazoliumazo dye of general formula (I)

Abstract: The present application relates to cationic pyrazolone dyes of the general formula (I), and to coloring agents for keratin fibers comprising these dyes.

Abstract: Disclosed herein is the use, in the coloring of keratinous fibers, such as human keratinous fibers, such as the hair, of a composition comprising at least one compound chosen from the compounds of formula (I) comprising a cyclic group G including a ring H capable of opening, the dyes corresponding to the compounds of formula (I) wherein the ring H is open, and the addition salts thereof: and a method for treating keratinous fibers employing this composition.

Abstract: The present disclosure relates to a substantially dry cosmetic article for dyeing keratin materials, comprising a porous flexible substrate, and at least one direct dyes and/or direct dye precursor in powder form, which are capable of dyeing the keratin material via heat transfer, the substrate and the direct dyes or direct dye precursors being non-covalently bonded to the substrate. Disclosed herein is also a method for dyeing keratin materials, for example, human keratin materials, via dry heat transfer, using the dry heat-transfer cosmetic article.

Abstract: The invention relates to a composition comprising, in a cosmetically acceptable medium, at least one particular direct dye. The invention further relates to a method for treating keratin fibers, in particular human keratin fibers, using the abovementioned composition, and a device comprising it. Finally, its subject is the use of the composition according to the invention as agent for lightening and/or as agent for dyeing said fibers.

Abstract: This invention relates to a hair dyeing composition comprising at least one anionic and at least one cationic direct acting hair dyes and showing excellent dyeing ability and excellent resistance to hair washing and environmental influences. The colouring composition of this invention are ready to use colouring composition and, therefore, do not require any mixing prior to application with additional agents such as oxidizers. According to the invention the preferred cationic dyestuffs are selected from the following structures wherein R1, R2, R3 and R4 stand for hydrogen, a CH3— or C2H5— group, and Y is an anion such as chloride, bromide, methosulfate.

Abstract: The invention relates to a method of imparting color onto keratinous substrates involving contacting said substrate with a composition comprising: at least one triarylmethane dye molecule chosen from polymeric triarylmethane dye molecules, copolymeric triarylmethane dye molecules, oligomeric triarylmethane dye molecules, and mixtures thereof; at least one film forming agent; and at least one solvent; and irradiating said substrate with a flash of light.