发明授权
US4840674A Ink compositions 失效
油墨组合物

Ink compositions
摘要:
An improved ink composition comprised of a major amount of water; an organic solvent selected from the group consisting of tetramethylene sulfone; 1,1,3,3-tetramethyl urea; 3-methyl sulfolane; and 1,3-dimethyl-2-imidazolidone; which solvent has permanently dissolved therein spirit soluble dyes such as black, yellow, cyan, magneta, brown, and mixtures thereof.
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