| 摘要 |
PROBLEM TO BE SOLVED: To provide a fluorescent ink for ink jet printing which, even when it has a low viscosity suitable for high-speed ink jet printing, can yield a fluorescent print layer capable of emitting light at a high fluorescent intensity independently of the type (color and material) of a substrate and to provide a process for preparing a fluorescent print and a fluorescent print using the same. SOLUTION: This fluorescent ink comprises a fluorescent dye and a vehicle, wherein the vehicle contains polyvinyl pyrrolidone. The polyvinyl pyrrolidone has a mol. wt. in the range of 5,000 to 150,000. The process for preparing a fluorescent print comprises printing the fluorescent ink by ink jet printing on a substrate. The fluorescent print comprises: a substrate; and a fluorescent print layer provided on the substrate, the fluorescent print layer comprising a fluorescent dye and polyvinyl pyrrolidone. |
