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AssigneeSumitomo Chemical Company, Limited
InventorsShinei Ikeou, Takemi Tokieda, Noriaki Yamauchi, Kunihiko Imada, Yutaka Kayane
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An aqueous liquid dye composition comprising a dye represented by the following formula in a free acid form, ##STR1## wherein Y is --CH.dbd.CH.sub.2 or --CH.sub.2 CH.sub.2 X in which X is a group splittable by the action of an alkali, and a pH buffer, the dye being in the form of a lithium salt, and the liquid dye composition having a pH value of from 3 through 7 and a dye content of from 5 through 50% by weight based on the weight of the liquid dye composition, which can be stored stably for a long period of time even at a low temperature such as 0.degree. C. or lower, and a high temperature such as 40.degree. C. or higher.
An aqueous liquid dye composition comprising a dye mixture of ester dyes represented by the following formulas in their free acid forms, ##STR6## and vinylsulfone dyes represented by the following formulas in their free acid forms, ##STR7## and a pH buffer, each dye represented by the above formulas being in the form of a lithium salt, and the liquid dye composition having a pH value of from 3 through 7 and a dye content of from 5 to 50% by weight based on the weight of the liquid dye composition.
Dependencies are inferred from the claim text.