Dyeing method
AssigneeAsahi Chemical Co., Ltd.
InventorsOsamu Manabe, Masayasu Utsunomiya, Morihiro Kamiyama, Michiaki Tsutsui, Masayuki Matsumoto
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Abstract
Textile materials such as fiber and cloth can be dyed more satisfactorily with sulfur dyes or sulfurized vat dyes by allowing an organic mercapto compound and/or an organic sulfur compound capable of generating mercapto groups under dyeing conditions to be present in dye baths. Still more improved dyeing results may be obtained by allowing a sulfite salt compound to be further present in such dye baths.
Claims9
In a method of dyeing a textile material wherein the textile material is dyed in an alkaline dye bath using a sulfur dye or sulfurized vat dye, the improvement which comprises the dye bath containing an organic sulfur-containing compound selected from the group consisting of organic mercapto compounds having at least one --SM.sub.1 group wherein M.sub.1 is a hydrogen atom or an alkali metal atom, organic sulfur compounds capable of generating mercapto groups under dyeing conditions and combinations thereof and a sulfite salt compound wherein said organo sulfur-containing compound is present in a concentration of about 0.1 to about 20 g/l and the concentration of said sulfite salt compound is about 1 to 100 g/l.
Dependencies are inferred from the claim text.