Method for bleaching cloths
AssigneeNissan Chemical Industries, Ltd.
InventorsMasanori Ota, Masashi Nakamura, Takashi Kamiyama
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Abstract
A method for bleaching a cloth dyed with an indigo dye by using a processing solution containing a bleaching agent, wherein said processing solution is an aqueous solution of a dichloroisocyanuric acid salt, is disclosed. According to the invention, the degree of bleaching can be easily controlled and, after the bleaching, neither yellowing nor deterioration of fibers occurs.
Claims18
A method of bleaching a denim dyed with an indigo dye by using a processing solution containing a single bleaching agent and a cationic surfactant, wherein said processing solution is an aqueous solution, said bleaching agent consists of dichloroisocyanuric acid salt in a concentration of from 0.05 to 0.4% by processing solution, in terms of available chlorine, and said cationic surfactant is present in a concentration of from 0.005 to 0.5% by weight of said processing solution.
A method for bleaching a denim dyed with an indigo dye by using a processing solution containing bleaching agents, wherein said processing solution is an aqueous solution of a dichloroisocyanuric acid salt and is compounded with at least one member selected from the group consisting of a basic compound, an anionic surfactant, and a nonionic surfactant, and the processing solution has a pH value approximately from 5 to 11 and a concentration of available chlorine approximately from 0.1 to 1.0% by weight.
A method for bleaching a denim dyed with an indigo dye by using a processing solution containing a single bleaching agent, wherein said processing solution is an aqueous solution of a dichloroisocyanuric acid salt and a cationic surfactant, the processing solution having a pH value of approximately 5 to 11 and a concentration of available chlorine approximately from 0.1 to 0.4% by weight.
Dependencies are inferred from the claim text.