A composition for detecting blood includes 3,3′, 5, 5′-tetramethylbenzidine, cumene hydroperoxide, and a surfactant. The composition is an aqueous solution. The surfactant is an anionic surfactant or a non-ionic surfactant. The composition is useful for the detection of blood, in particular occult blood in saliva. Also described are methods for detecting blood using the composition, a kit including the composition, and the use of a surfactant to reduce the time taken to detect blood.

The present invention relates to the use of phenyl ketone derivatives of the formula I for use as self-tanning substance or for increasing melanin synthesis, improving melanin transport and/or improving the distribution of melanin in suprabasal layers, and to preparations comprising these phenyl ketone derivatives.

Oxidation dyeing process using a substrate bearing at least one oxidation dye, several preservatives and an oxidizing aqueous composition The present invention relates to a process for the oxidation dyeing of keratin fibres, in particular human keratin fibres such as the hair, comprising a step of application, to said keratin fibres, i) of a substrate comprising on its surface one or more oxidation dyes, one or more thiolated reducing agents and one or more organic reducing agents of reductone type, and a step of application, to said keratin fibres, ii) of an oxidizing aqueous composition comprising one or more oxidizing agents. The present invention also relates to a process for preparing said substrate. The invention also relates to an element in sheet form, pretreated by a composition comprising one or more oxidation dyes, one or more thiolated reducing agents, and one or more organic reducing agents of reductone type.

The present invention relates to a process for the oxidation dyeing of keratin fibers implementing: a) a step of pretreating said fibers by application to said fibers of a cosmetic composition (B) comprising: i) at least one fatty substance in an amount of greater than or equal to 10% by weight relative to the total weight of the composition (B); and ii) at least one metal catalyst; b) optionally a washing, rinsing, drying and/or rubbing-dry step; c) followed by a step of dyeing by application to said fibers of a cosmetic composition (A) comprising: i) at least one oxidation base, preferably chosen from para-phenylenediamines, bis(phenyl)alkylenediamines, para-aminophenols, ortho-aminophenols, heterocyclic bases preferably comprising at least two nitrogen atoms, and addition salts thereof; ii) optionally at least one coupler; and iii) at least one chemical oxidizing agent. The dyeing process makes it possible to significantly improve the dyeing properties of the coloration, in particular in terms of selectivity, of chromaticity, and of color intensity and uptake. The use of a composition which is rich in fatty substances, i.e. greater than 10%, and contains at least one catalyst pretreatment, before oxidation dyeing, allows a clear improvement in the dyeing properties, in particular in terms of dye uptake onto keratin fibers, of strength and of chromaticity and of selectivity of the color.

The subject of the present invention is a process for the oxidation dyeing of keratin fibers, in particular human keratin fibers such as the hair, implementing: a) a step of treating said fibers by application to said fibers of a cosmetic composition (A) comprising: i) at least one fatty substance in an amount of greater than 10% by weight relative to the total weight of the composition (A), at least one metal catalyst; ii) at least one coupler; iii) optionally at least one oxidation base, preferably chosen from para-phenylenediamines, bis(phenyl)alkylenediamines, para-aminophenols, ortho-aminophenols, heterocyclic bases, addition salts thereof and solvates thereof; b) optionally a washing, rinsing, drying and/or rubbing-dry step; c) a step of treatment by application to said fibers of an oxidizing cosmetic composition (B) comprising at least one chemical oxidizing agent; and it being understood that steps a), b) and c) can be carried out successively a), then b), then c), or else a) then c), followed by b). The dyeing process makes it possible to significantly improve the dyeing properties of the coloration, in particular in terms of selectivity, of chromaticity, and of color intensity and uptake. The use of a composition which is rich in fatty substances, i.e. greater than 10%, and contains at least one catalyst, as a pretreatment, before oxidation dyeing, allows a clear improvement in the dyeing properties, in particular in terms of dye uptake onto keratin fibers, of strength and of chromaticity and of selectivity of the color.

A cosmetic product for hair bleaching or hair dyeing comprises a first agent containing an alkali agent, a second agent containing hydrogen peroxide, and a nonaerosol foamer container for discharging a mixed solution thereof in the form of foam, the mixed solution containing 1 mass % or more of the components (A) and (B) in total, wherein a mass ratio (B)/(A) is 0.25 or more. (A) 0.01 to 5 mass % of an anionic surfactant containing sulfuric acid group represented by the following formula
R—O—(CH.sub.2CH.sub.2O).sub.n—[CH.sub.2CH(CH.sub.3)O].sub.m—SO.sub.3M
wherein R represents a C.sub.8-25 hydrocarbon group, n and m each represent an average number of moles added of 0 to 50, and M represents an alkali metal or NH.sub.4, and (B) a polymer comprising a diallyl quaternary ammonium salt as a constitutional unit and having a charge density of 5.5 meq/g or more and 8.0 meq/g or less.

Methods of stabilizing color in a composition, which methods comprise: (a) providing an amino-substituted hydroxybenzophenone compound corresponding to the general formula (I):

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and (b) combining the amino-substituted hydroxybenzophenone compound with a composition to be stabilized selected from the group consisting of cosmetic preparations and dermatological preparations, are described along with compositions containing an organic dye and an amino-substituted hydroxybenzophenone compound corresponding to the general formula (I).

A cosmetic product includes a cosmetic preparation including, in relation to the total weight thereof, 35 to 85 wt % polar solvent and 0.001 to 10 wt % oxidation dye precursor. The cosmetic product also includes b) a device for flash evaporation of the cosmetic preparation a). A method incorporates the use of the corresponding product and particularly the use of the cosmetic preparation a) as a process material in a device for flash evaporation.

Described herein is a method for treating and coloring hair including un-pigmented hair. The method includes (a) providing a first composition including one or more heavy metal ion sequestrants; (b) applying the first composition to the hair; (c) providing a second composition including one or more weak acids having a pKa from 2.5 to 5; (d) applying the second composition to the hair; (e) providing a third composition including one or more direct dyes chosen from nitro dye, disperse dye, cationic dye, acid dye, basic dye, neutral azo dye and mixtures thereof, and (f) applying the third composition to the hair. The third composition is able to decrease the reflectance of un-pigmented hair in a wavelength range from 530 nm to 670 nm.

The present invention relates to an anhydrous dyeing composition which is liquid at 20° C. and comprising one or more oil liquid at 20° C., one or more direct dyes and at least one anionic surfactant and at least one nonionic surfactant for achieving intensive homogeneous colors on hair.