Abstract: The invention relates to a composition comprising, in a cosmetically acceptable medium, at least one particular fluorescent dye. The invention also relates to a process for treating keratin fibres, in particular human keratin fibres, using this composition, and also to a device comprising it. Finally, the invention relates to the use of the composition according to the invention as a lightening agent or as a colouring agent for the said fibres.

Abstract: The invention relates to a composition comprising at least one fluorescent dye and at least one particular sequestering agent, and also to processes and a device for using these compositions. The invention similarly relates to the use of a composition comprising at least one particular fluorescent dye and at least one particular sequestering agent, to dye with a lightening effect human keratin materials and more particularly artificially dyed or pigmented hair, and coloured skin.

Abstract: The invention relates to the use for of compositions dyeing keratin materials containing, in a medium that is suitable for dyeing, at least one compound of formula (I) in which X and Y, independently of one another, are chosen from a CH group and a nitrogen atom, R is chosen from aromatic mono- or poly-cyclic groups with fused or non-fused rings, wherein the groups have at least 5 members and optionally comprise at least one hetero atom chosen from nitrogen, oxygen, sulphur and phosphorus. Processes and kits using these compositions are also disclosed.

Abstract: A composition and method for dyeing keratin materials, comprising, in a medium that is suitable for dyeing, at least one compound of formula (I) wherein X is chosen from sulphur atoms and selenium atoms, R is chosen from hydrogen, C1-C9 alkyl groups, cyano groups, halo groups, C1-C6 alkoxy groups, amino groups, (C1-C6 alkyl)amino groups, hydroxy(C1-C6 alkyl)amino groups, tri(C1-C6 alkyl)ammonio groups, imidazolyl groups, pyridinyl groups, thio groups, (C1-C6 alkyl)thio groups, thio(C1-C6 alkyl) groups, (C1-C6 alkyl)carbonyl groups, hydrogenocarbonyl groups, hydroxycarbonyl groups, (C1-C6 alkoxy)carbonyl groups, nitro groups, sulphonato groups, and corresponding protonated groups, and aromatic groups. Dyeing kits are also disclosed.

Abstract: The present disclosure relates to the process, for dyeing keratin materials, comprising applying to the keratin materials a composition comprising, in a medium appropriate for dyeing, at least one polycyclic aromatic vicinal trione, which may be optionally combined with at least one compound comprising a liable hydrogen. Further disclosed herein is a cosmetic dyeing composition, a multicomponent hair dye composition, and a multicompartment kit comprising the same.

Abstract: The present disclosure relates to the process, for dyeing keratin materials, comprising applying to the fibers a composition comprising, in a medium appropriate for dyeing, at least one ninhydrin derivative, which may optionally be combined with at least one compound comprising a labile hydrogen. Further disclosed herein is a multi-component hair dye composition, and a multi-compartment kit comprising same.

Abstract: Disclosed are processes and compositions for dyeing keratin materials comprising, in a medium that is suitable for dyeing, at least one ninhydrin compound of formula (I) wherein, A comprises an at least 12-membered polycycle, such as those chosen from anthracenyl, tetracenyl, phenanthrenyl, and azulenyl groups. Hair dyeing processes and kits using these compositions are also disclosed.

Abstract: The present disclosure relates to a process for dyeing keratin materials with compositions comprising, in a medium that is suitable for dyeing, at least one ninhydrin derivative, which may optionally be combined with at least one compound comprising at least one labile hydrogen. Further disclosed herein are dying compositions, multi-component hair dye compositions, and a multi-compartment kits.

Abstract: Disclosed herein are compositions comprising at least one fluorescent dye and at least one particular associative polymer, processes using this composition, and a device therefor. Further disclosed herein is the use of a composition comprising at least one fluorescent dye and at least one particular associative polymer for dyeing a human keratin material, such as artificially dyed or pigmented hair and dark skin, with a lightening effect.

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 disclosure relates to a composition comprising at least one fluorescent dye and at least one non-associative thickening polymer, to processes using such a composition, and to devices comprising such a composition. The disclosure also relates to processes and methods for dyeing human keratin materials, for example artificially dyed or pigmented hair and dark skin, with a lightening effect, using compositions comprising at least one fluorescent dye and at least one non-associative thickening polymer.

Abstract: Disclosed herein are compositions comprising at least one fluorescent dye and at least one polyol, processes using this composition and a device therefor. Further disclosed herein is the use of a composition for dyeing a human keratin material, such as artificially dyed or pigmented hair and dark skin, with a lightening effect, comprising at least one fluorescent dye and at least one polyol.

Abstract: The present disclosure relates to compositions comprising at least one soluble fluorescent dye and at least one compound comprising an acid functional group, and to processes using this composition.

Abstract: Composition and method for dyeing keratin materials, such as hair, comprising luminescent semiconductive nanoparticles capable of emitting, under the action of a light excitation, radiation with a wavelength ranging from 400 nm to 700 nm.

Abstract: The invention relates to a composition containing a pyrazine derivative and to the use of said derivative as an optical bleach and/or dye in a direct or oxidation dyeing composition for keratin fibres, particularly human keratin fibres and, more specifically, hair. The invention also relates to the methods using said compositions.

Abstract: A system for applying a hair product to hair strands may include an applicator including a reservoir forming portion for containing a hair product to be applied. The applicator may include an applicator portion that may include an application area configured to engage with at least one hair strand during relative movement, in a direction longitudinal to the at least one hair strand, of the applicator with respect to the at least one hair strand. The applicator may include at least one passage configured to transfer hair product between the reservoir forming portion and the application area during the relative movement of the applicator. The system may include a flexible sleeve configured to receive the at least one hair strand via one of the open ends and to enclose the at least one hair strand over at least a portion of the length of the at least one hair strand.