Aqueous ink which contains compounds having one or more structures represented by general formula (1) in a molecule or salts thereof and which has a clear hue and is excellent in light fastness and moisture resistance is provided.
1
wherein each of R
1
to R
5
and R
7
independently, represents a hydrogen atom, a halogen atom, an unsubstituted or substituted alkyl group, an unsubstituted or substituted alkoxy group, an unsubstituted or substituted alkenyl group, an unsubstituted or substituted aryl group, a hydroxyl group, —COOH, —SO
3
H, —CONR
8
R
9
or —COXR
10
, and R
6
represents a hydrogen atom, a cyano group, an aminocarbonyl group, a sulfomethyl group or —SO
3
H
本发明提供了一种
水性油墨,其分子中含有通式(1)所代表的一种或多种结构的化合物或其盐类,该油墨色调清晰,耐光性和防潮性极佳。
1
其中每个 R
1
至 R
5
和 R
7
分别代表氢原子、卤素原子、未取代或取代的烷基、未取代或取代的烷氧基、未取代或取代的烯基、未取代或取代的芳基、羟基、-COOH、-SO
3
H、-CONR
8
R
9
或-COXR
10
和 R
6
代表氢原子、
氰基、
氨基羰基、磺甲基或-SO
3
H