Patent ID: 6838424

Claim:
Two-agent type liquid bleaching compositions made of an agent A and an agent B filled and held in separate chambers of a container, said two-agent type liquid bleaching compositions comprising: said agent A composed of hydrogen peroxide which contains 0.1 to 10% by weight, an acid agent and water; and said agent B composed of an alkali agent and water, wherein said agent A and said agent B meet the following conditions of (I) and (II), respectively: (I) A pH of said agent A ranges from 1 to 6.5 at 20° C. and a volume of aqueous 0.1 N sodium hydroxide solution required to adjust a pH of 1,000 ml of said agent A to 7 at 20° C. is from 50 to 1,000 ml; and (II) A pH of said agent B ranges from 9 to 12 at 20° C. and a volume of aqueous 1 N sulfuric acid solution required to adjust a pH of 1,000 ml of said agent B to 7 at 20° C. is from 450 to 2,000 ml.