Hair bleach composition and hair dye composition

Claim 1

A bleach composition or a dye composition for hair which comprises a first composition containing an alkali agent and a second composition containing an oxidizing agent, the bleach or dye composition comprising the following components (A) to (E): (A) an organic solvent having a partition coefficient (octanol-water) (log P) at 25°C of 0.3-6 and a molecular weight of 200 or less, in an amount of 1-70:wt.% of the entire composition; (B) an organic solvent having a partition coefficient (octanol-water) (log P) at 25°C of less than 0.3, being positively added in an amount of less than 8 wt.% of the entire composition and less than that of component (A); (C) an alkali agent in an amount of 0.1-10 wt.% of the entire composition; (D) an oxidizing agent in an amount of 0.1-12 wt.% of the entire composition as reduced to hydrogen peroxide; and (E) water in an amount of 20-55 wt.% of the entire composition, and has a pH of 7.5-12 after mixing of the first composition and the second composition, wherein the composition comprises ammonia in an amount of 0-1% by weight based on the entire composition.