Abstract: The present invention provides a powdery solid hair cosmetic that enables easy hairdressing, enables hairdressing into an intended hairstyle without sticky feeling, can impart a natural texture, and has an unprecedented, novel form. The powdery solid composition for hair of the present invention is in a powdery solid form, is used for hair, and contains a powder and an oil.

Abstract: A hair dye composition is provided that comprises a first agent containing an oxidation dye and an alkaline agent, and a second agent containing hydrogen peroxide, the hair dye composition being used after mixing the first agent and the second agent. The hair dye composition contains an ascorbic acid compound and the hydrogen peroxide in amounts of from 1.0 to 5.0% by mass and from 0.3 to 1.6% by mass, respectively. The alkaline agent is contained in an amount of from 3.0 to 30 mmol per 100 g of the hair dye composition.

Abstract: A hair dye composition is provided that comprises a first agent containing an oxidation dye and an alkaline agent, and a second agent containing hydrogen peroxide, the hair dye composition being used after mixing the first agent and the second agent. The hair dye composition contains an ascorbic acid compound and the hydrogen peroxide in amounts of from 1.0 to 5.0% by mass and from 0.3 to 1.6% by mass, respectively. The alkaline agent is contained in an amount of from 3.0 to 30 mmol per 100 g of the hair dye composition.

Abstract: The present invention provides a dye remover composition performing destaining by the reduction action of a reducing agent, wherein the composition reduces the irritation to a scalp when applied to the scalp and is capable of preventing air oxidation after the destaining treatment. The dye remover composition is used for destaining fiber stained with an oxidation dye including a dye intermediate having an amino group, includes a reducing agent, and performs the destaining of fiber by the reduction action of the reducing agent. The dye remover composition further includes a reducing sugar. Examples of reducing sugar include xylose and dihydroxyacetone.