The present invention relates to a process for dyeing keratin fibers, in particular human keratin fibers such as the hair, using a) one or more blue, violet or green dyes and b) one or more disulfide, thiol or protected-thiol fluorescent dyes. The present invention also relates to a cosmetic composition comprising the dyes defined above, and also to a multi-compartment device containing said dyes. The present invention also relates to the use of said dyes for dyeing light keratin fibers, notably human keratin fibers such as the hair, in chestnut-brown, dark chestnut-brown, brown, brown with a tint, or even black, without using an additional dye other than those defined above.

The present disclosure provides silicone-based biophotonic compositions and methods useful in phototherapy. In particular, the silicone-based biophotonic compositions of the present disclosure include a silicone phase and a surfactant phase, wherein the surfactant phase comprises at least one chromophore solubilized in a surfactant. The silicone-based biophotonic compositions and the methods of the present disclosure are useful for promoting wound healing and scarring, as well as various other skin disorders.

To obtain an inorganic blue fluorescent material that is composed of elements for which there are no suspected harmful effects on humans, and that has excellent texture when applied to skin. A fluorescent material for a cosmetic being a composite oxide containing from 0.0005 to 0.05 (in terms of a mole ratio relative to 1 mol of phosphorous in a molecule) of Ce in a compound represented by general formula Ca.sub.aP.sub.bO.sub.c (3.2≤a≤5.0, b=2, c=a+5) and having an average particle diameter of from 1 to 10 μm.

A cosmetic composition is disclosed comprising a synthetic optical brightener and a naturally-derived optical brightener. Both brightener classes absorb and emit light at different wavelengths and possess in combination a superior effect. The combination enhances color brilliance on keratin fibers under daylight and artificial light conditions.

The present disclosure provides biophotonic topical compositions, kits and their uses. In some aspects, the biophotonic topical compositions of the present disclosure comprise a first chromophore, a salt selected from one or more bicarbonate or carbonate salts or a combination of the foregoing salts, and one or more gelling agents. In some aspects, the biophotonic topical compositions of the present disclosure comprise a first chromophore, one or more polyols, and one or more gelling agents. The biophotonic compositions of the present disclosure do not include an oxidant selected from the group consisting of a peroxide, a peroxy acid, hydrogen peroxide, carbamide peroxide, an alkali metal peroxide, an alkali metal percarbonate, peroxyacetic acid, and an alkali metal perborate. The biophotonic compositions are useful for promoting wound healing and skin rejuvenation, as well as treating acne and various skin disorders.

Components, for example, nanoparticles for detecting and/or treating one or more active carious lesions or microcavities in teeth of a subject are provided. The component or nanoparticle may comprise a biocompatible and biodegradable polymer (e.g., a starch) bearing at least one cationic region and/or having a net positive charge and thereby capable of associating with one or more active and/or early carious lesions on a tooth in an oral cavity of a subject. The components or nanoparticles are optionally water soluble or dispersible. The components or nanoparticle also comprises an imaging agent (e.g., a fluorophore or dye) bonded to the biocompatible and biodegradable polymer. The component or nanoparticle is thus capable of indicating the presence of one or more active carious lesions when the component or nanoparticle is associated therewith. Oral care compositions comprising such compounds/nanoparticles and methods of making and using the same are also provided.

A method is described for the treatment and/or prevention of damaged keratin in a keratin-containing tissue, comprising the steps of: applying on the keratin-containing tissue a cosmetic composition comprising molecules carrying at least one light reactive functional group, and at least one photoinitiator; and leaving to process with exposure of the keratin-containing tissue to light, the light being of a wavelength suitable for activating said at least one photoinitiator. A cosmetic composition is also described comprising molecules carrying at least one light reactive functional group and at least one photoinitiator; and its use.

To provided provide an oil-based cosmetic in which a pattern such as uneven or streak-like flow marks is reduced or inhibited, and which has excellent appearance gloss.

An oil-based cosmetic of the present disclosure contains a first photoluminescent pigment having an average particle size of 80 μm or less; and a polymeric oil-phase thickener, wherein the mass ratio of the first photoluminescent pigment and a second photoluminescent pigment having an average particle size of more than 80 μm is 55:45 to 100:0, when the oil-based cosmetic contains a coloring material, the mass ratio of the first photoluminescent pigment with respect to the coloring material is 2.0 or higher, the content of thickening particles is less than 4.0% by mass, and the oil-based cosmetic has a viscosity of 50 mPa.Math.s or higher under a temperature in at least a portion of a range of 80 to 150° C.

This invention provides ink particles comprising a) a core comprising a coloring agent and a polymer, and b) an outermost layer comprising a surfactant or a dispersant, wherein the core further comprises an outer surface and the outermost layer at least partially covers the outer surface of the core. The invention further provides ink particles comprising a) a core comprising a coloring agent, b) a shell, and c) an outermost layer comprising a surfactant or a dispersant, wherein: the core or the shell comprises a polymer, wherein the polymer is polycaprolactone (PCL), poly D-lactic acid (PDLA), poly L-lactic acid (PLLA), poly(lactic-co-glycolic acid), (PLG), polyethylene glycol (PEG), polyethylene glycol-diacrylate (PEGDA), poly(sebacic anhydride) (poly(SA)), polyorthoester, aliphatic polyanhydride, aromatic polyanhydride, or a copolymer thereof; the core further comprises an outer surface; the shell at least partially covers the outer surface of the core; the shell further comprises an outer surface; and the outermost layer at least partially covers the outer surface of the shell. The invention also provides a composition of the ink particles and a liquid carrier or a kit comprising the ink particles and a liquid carrier, and methods of using the composition and the kit for use in a method for tattooing a subject.

The object is to provide a skin whitening agent having an excellent skin whitening effect. A compound expressed by the following Formula (1), or an acid addition salt thereof is used as an active ingredient of the skin whitening agent:

##STR00001##

wherein, X represents an alkylene group having 1 to 2 carbon atoms, where a hydrogen atom may be substituted with a methyl group; Y represents COOR.sup.1 or CH.sub.2OR.sup.2; R.sup.1 represents a hydrogen atom, or an optionally branched alkyl group having 1 to 6 carbon atoms; and R.sup.2 represents a hydrogen atom or an optionally branched acyl group having 1 to 6 carbon atoms.