A hair dyeing method that involves first step of applying on the hair a hair dye composition containing a compound represented by the following general formula (1A) or a salt thereof and an organic alkaline agent and having a pH of 9.0 or more and 11.0 or less:

##STR00001##

wherein a broken line represents the presence or absence of a π bond; R.sup.1 represents a hydroxy group or an acetoxy group; and R.sup.2 represents a hydrogen atom, an acetyl group, a methyl group, or an ethyl group; and a second step of applying on the hair a hair treatment agent containing an organic acid or a salt thereof and having a pH of 5.5 or less. After performing the first step, the hair is subjected to the second step while maintaining in a wet state in which an amount of water per gram of the hair is 0.008 g or more.

The present invention is in the field of personal care compositions; in particular skin lightening compositions. A composition that combines the cyclic adenylic acid reduction and the reduction of melanin content in melanocytes remains to be desired. It has been found that niacinamide in combination with MMP inhibitor galardin synergistically reduces melanin content in melanocytes. The invention thus relates to a composition comprising a synergistic combination of niacinamide and galardin for use in skin lightening. Thus the composition, when applied topically over an appropriate length of time in-vivo, may be used to lighten the skin, or to reduce age spots or freckles.

The present invention discloses new uses of coloured co-crystals and associated salts formed by co-crystallization reactions in the dye, ink and paint industries. The present invention also provides novel co-crystals for use in, for example, the dye, ink and/or paint industries.

This invention relates to the use of at least one following compound having formula (I), as well as the salts thereof, the optical and geometric isomers thereof, and the solvates thereof, as deodorant agent for treating body odor, preferably underarm odor: ##STR00001##

According to the present invention, a composition that has high safety, can be continuously used for a long period, promotes production of VEGF and FGF7 involved in hair growth, and affords good prophylactic or improving effect on thinning hair or hair loss can be provided. The present invention relates to a composition for promoting hair thickening, containing one or more members selected from the group consisting of citrulline, tryptophan, glutamine, and ornithine, a composition for maintaining the anagen phase in the hair cycle and a composition for promoting VEGF production, each containing one or more members selected from the group consisting of citrulline, tryptophan, and glutamine, a composition for promoting transition from the telogen phase to the anagen phase in the hair cycle and a composition for promoting FGF7 production, each containing ornithine, and a composition for promoting normalization of the hair cycle, containing one or more members selected from the group consisting of citrulline, tryptophan, glutamine, and ornithine.

Disclosed are methods for coloring hair, comprising applying a mixture comprising one or more hair dyes and an additive as a pre-treatment, as a simultaneous treatment, as a post-treatment, or a combination thereof.

The present invention relates to ophthalmic and non-ophthalmic systems with blue light filtering and Yellowness Index ranges. UV and IR filtering are also included. Industrial applications are also outlined in the invention.

The present invention relates to a hair cosmetic containing the following components (A) to (C): (A) a compound represented by the following general formula (1) or a salt thereof: ##STR00001## wherein a broken line represents the presence or absence of a π bond; R.sup.1 represents a hydroxy group or an acetoxy group; R.sup.2 represents a hydrogen atom or —COOR (R is a hydrogen atom, a methyl group, or an ethyl group); and R.sup.3 represents a hydrogen atom, an acetyl group, a methyl group, or an ethyl group; (B) a dimethylsilicone; and (C) an amino-modified silicone, the hair cosmetic satisfying such conditions that a mass ratio of the component (C) to the component (B) [(C)/(B)] is 0.3 or more and 3.0 or less; and a mass ratio of the component (A) to the component (B) and component (C) {(A)/[(B)+(C)]} is 1.0 or less.

A method for reversing or mitigating skin aging comprising topically applying a composition which comprises at least one oxidant, and at least one fluorescent dye capable of activating the oxidant and illuminating said composition for a time sufficient to activate the at least one oxidant.

Nanoemulsions and a method for making the same are described. The nanoemulsions comprise a skin benefit agent in the water phase and they are made from two macroemulsions that have non-identical pH values.