Abstract: The invention relates to a dyeing composition for keratinous fibres containing, in a suitable vehicle, at least one 2-nitro-para-phenylenediamine direct dye, in free or salified form and also at least one xanthine derivative of formula (II) ##STR1## where n=0 or 1, R'.sub.3 =H, R'.sub.1, R'.sub.2, R'.sub.4 and R'.sub.5 are substituents having various significances, the said compound of formula (II) being in free or salified form. They can be used for dyeing hair.

Abstract: The invention relates to the use of 5-hydroxy-1,4-naphthoquinones of the formula: ##STR1## in which R.sub.1 and R.sub.2, which are identical or different, independently of one another denote a hydrogen atom, a methyl, methoxy or nitro group or a halogen atom; R.sub.3 and R.sub.4, which are identical or different, independently of one another denote a hydrogen atom or a hydroxyl, methyl or methoxy group; and R.sub.5 denotes a hydrogen atom or a methyl or methoxy group, with the proviso that at least one of the substituents R.sub.1 and R.sub.2 is different from hydrogen, if R.sub.3, R.sub.4 and R.sub.5 simultaneously denote a hydrogen atom, for dyeing human keratin fibres, in particular the hair.

Abstract: The present invention relates to new 1-(substituted phenoxy)-3-aminopropan-2-ol compounds in which the extra-nuclear amine group may or may not be substituted, and to the process for their preparation. The invention also relates to hair-dyeing compositions containing these new compounds and to a dyeing process using the said compositions.

Abstract: The use in dyeing human keratin fibres, especially human hair, of 2-hydroxy-1,4-naphthoquinones of the formula: ##STR1## in which R.sub.1 denotes a hydrogen or halogen atom, or a hydroxy, alkoxy, nitro, alkyl or acyl group, and R.sub.2, R.sub.3, R.sub.4 and R.sub.5 independently of one another denote hydrogen or a hydroxyl, alkoxy, alkyl or acyl group, such that at least one of the substituents R.sub.1 to R.sub.5 is other than hydrogen, and if R.sub.1, R.sub.3 and R.sub.4 denote hydrogen, R.sub.2 and R.sub.5 cannot simultaneously denote hydroxyl is described.

Abstract: The invention relates to the use, for dyeing keratin fibres, and in particular human hair, of benzoquinone derivatives of the formula: ##STR1## in which R.sub.1 and R.sub.3 independently of one another denote hydrogen, a hydroxyl group, an alkoxy group or an optionally hydroxylated alkyl group, and R.sub.2 and R.sub.4 independently of one another denote hydrogen, hydroxyl, alkoxy, alkyl, or phenyl optionally substituted by OH, these compounds having at most two alkyl or alkoxy groups on the quinone ring; if one of the radicals R.sub.1, R.sub.2, R.sub.3 or R.sub.4 denotes a methyl, hydroxyl or methoxy group, at least one of the other substituents is different from hydrogen, and if two of these substituents R.sub.1, R.sub.2, R.sub.3 or R.sub.4 are identical and located in the para-position relative to one another and denote hydroxyl or methoxy, at least one of the other two substituents is different from hydrogen.

Abstract: The invention relates to oxidation dyeing compositions comprising oxidation dyestuff precursors and N-substituted ortho-nitroanilines of the formula: ##STR1## in which R.sub.1 denotes an alkyl, monohydroxyalkyl or polyhydroxyalkyl group, R.sub.2 denotes hydrogen or an amino, monoalkylamino, dialkylamino, mono- or di-(monohydroxyalkyl or polyhydroxyalkyl)-amino, (N-alkyl-N-monohydroxyalkyl or N-alkyl-N-polyhydroxyalkyl)-amino, alkoxy, monohydroxyalkoxy, polyhydroxyalkoxy or aminoalkoxy group and R.sub.3 denotes hydrogen or an alkyl group, at least one of R.sub.2 and R.sub.3 being different from H, with the proviso that if R.sub.1 denotes --CH.sub.2 CH.sub.2 OH, R.sub.2 cannot be di-(monohydroxyalkyl)-amino in an alkaline medium which is non-ammoniacal and comprises an alkali metal or ammonium bisulphite and at least one alkanolamine which is N-(C.sub.1 to C.sub.4 -alkyl-ethanolamine, N,N-di(C.sub.1 to C.sub.4 -alkyl)-ethanolamine, di-(hydroxy-C.sub.2 to C.sub.

Abstract: This invention is directed to compositions of the developer-coupler type of the dyeing of hair, consisting essentially of substituted dihydroxypyridine compounds or salts thereof as coupling components and, as developer components, the conventional components used in oxidation dyes.

Abstract: A dyeing composition for the direct coloring of the hair, containing at least one direct dyestuff, and at least one xanthane gum is disclosed.

Abstract: Novel sulfur containing nitroamino benzene dyes of formula: ##STR1## and salts thereof wherein (a) R.sub.1 and R.sub.2 are the same or different and are selected from the group consisting of alkyl, hydroxyalkyl, polyhydroxyalky, aminoalkyl, monoalkylamioalkyl and dialkylaminoalkyl,wherein(b) n is 0, 1 or 2, and wherein(c) the group ##STR2## occupies a position that is meta or para to the group-NHR.sub.1 ; a process for synthesizing these compounds and their use as direct dyeing hair dyes are being disclosed.

Abstract: The subject invention concerns novel dye compositions and a process for dyeing keratinous fibers, for example, hair, to give a pleasing and stable colored product. The dye composition is a novel combination of three elements to give a dye that, unexpectedly, has highly desirable dyeing properties. This unique combination comprises (1) a suitable organic compound to assist dye dispersion, (2) dye precursors including dopamine, D-dopa, L-dopa, D,L-dopa, or analogs thereof, and (3) iodate or periodate. Desired color variations can be obtained by the use of appropriate color modifiers.

Abstract: The invention relates to a dyeing composition for keratinous fibres containing at least one 4-bis(.beta.-hydroxyethyl)amino-2-nitro-1-(N-substituted amino)benzene compound in which the substitution is C.sub.1 -C.sub.3 alkyl or .beta.-hydroxyethyl; this composition contains as co-solubilization agent at least one dye of formula (II) ##STR1## in which formula: R.sub.2 denotes a C.sub.2 -C.sub.3 hydroxyalkyl group;R.sub.3 denotes a C.sub.2 -C.sub.3 hydroxyalkyl group; with the proviso that, if R.sub.3 =CH.sub.2 CH.sub.2 OH, R.sub.2 is necessarily an .alpha.-hydroxyethyl or hydroxypropyl radical.

Abstract: The invention relates to a dyeing composition for keratinous fibres containing, in a suitable vehicle, at least one nitrated direct dye of the 2-nitro-paraphenylenediamine series, in which the amino group in position 4 is mono- or disubstituted with lower alkyl or hydroxyalkyl radicals and in which the amino group in position 1 is optionally monosubstituted with a lower alkyl or hydroxyalkyl radial, and the aromatic ring can be substituted or unsubstituted on the remaining positions; the invention consists in introducing into such a composition an imidazolidinedione or one of its substitution derivatives, to improve the solubility of the abovementioned nitrated direct dye by a co-solubilization phenomenon. The invention also relates to a process for dyeing keratinous fibres using such compositions.

Abstract: A process for dyeing keratin fibres is disclosed which involved applying:(a) at least one dyestuff of the formula: ##STR1## in which R.sub.1 and R.sub.2 independently designate hydrogen, amino, alkylamino, --NH--aliphatic--(X).sub.m, dialkylamino or --N--(aliphatic-(X).sub.m).sub.2, R.sub.3 designates hydrogen, OH, alkoxy or --O--aliphatic-(X).sub.m "aliphatic" designates an aliphatic radical having 2 to 4 free valencies, m designates an integer from 1 to 3 such that if m=1 X represents OH, Cl, OCH.sub.3 or OCH.sub.2 CH.sub.2 OH, or, if m designates 2 or 3, X designates OH, and R.sub.4 designates hydrogen, alkyl or halogen, with the proviso that at least one of R.sub.1, R.sub.2 and R.sub.3 is other than hydrogen, and that, if R.sub.1 and R.sub.2 are both other than hydrogen, R.sub.3 designates hydrogen,(b) at least one dyestuff of the formula: ##STR2## in which R.sub.5 designates hydrogen, amino, aminoalkyl, NH-aliphatic-(X).sub.m, N-(alkyl).sub.2, N-(aliphatic(X).sub.m).sub.2, or NHCH.sub.2 CH.sub.2 NH.sub.

Abstract: A process for preparing a hair dye or bleach composition which comprises mixing a gelifiable liquid vehicle with an oxidizing solution having dissolved therein an incompatible cationic polymer. The resulting gel is applied to the hair and after an appropriate contact time, the hair is rinsed.

Abstract: The dyeing compositions of the invention comprise at least one violet nitro dyestuff having a shade, on the Munsell scale, ranging from 7.5 P to 10 PB, and at least one yellow nitro dyestuff having a shade, on the Munsell scale, ranging from 10 Y to 2.5 Y, these violet and yellow dyestuffs being present in proportions such that their selectivity coefficients are substantially equal, the coefficients being from 3 to 8 when determined at a concentration of 0.1 to 0.6% by weight, the ratio by weight of the violet dyestuff to the yellow dyestuff being from 1:1 to 3:1.

Abstract: Dyeing compositions are disclosed which comprise at least one oxidation dyestuff precursor in combination with at least one direct dyestuff, in an aqueous vehicle, the direct dyestuff being a nitro derivative of the benzene series having the formula: ##STR1## in which R.sub.1 denotes the methyl group, R.sub.2 and R.sub.4 denote hydrogen and R.sub.3 denotes the .beta.-hydroxyethoxy group, or alternatively R.sub.1, R.sub.3 and R.sub.4 denote hydrogen and R.sub.2 denotes the methyl or hydroxyl group, or alternatively R.sub.1 and R.sub.2 denote hydrogen, R.sub.3 denotes the methyl group and R.sub.4 denotes the hydroxyl, (.beta.-hydroxyethyl)-amino or (.beta.-N,N-diethylaminoethyl)-amino group, or R.sub.1, R.sub.2 and R.sub.3 denote hydrogen and R.sub.4 denotes the N,N-bis-(.beta.-hydroxyethyl)-amino group.

Abstract: This invention has for its object new cosmetic compositions for treating hair and skin containing a powder of plant origin obtained from extraction residues of various plants.