| 摘要 |
PROBLEM TO BE SOLVED: To provide an ink satisfying in all respects of quick drying, print quality, and print fluorescence intensity, for an inkjet printer ink containing a fluorescent compound, capable of presenting reflected colors under visible light and emitting fluorescence under ultraviolet rays, a surfactant, and water. SOLUTION: The surfactant is a mixture of a 1st compound described by formula (1) wherein R is an isobutyl group and a 2nd compound described by formula (1) wherein R is an ethyl group. The mixture is so prepared that, when the content by percentage of the 1st compound is A wt.% and that of the 2nd compound is B wt.%, both A and B are more than zero and that the relationship between A and B satisfies 5.0<=16A+B<=6.5. |
