| 摘要 |
<p>A fluorescent composition with excellent light resistance comprising a base material and a particulate organic fluorescent dye which has a particle diameter of 10 to 2,000 nm and is excited by ultraviolet to emit a light in the visible region; and an ink composition comprising this fluorescent composition and a solvent. With this ink composition, a desired mark can be printed on an article without impairing its appearance. The printed mark can be detected with high sensitivity over long. Furthermore, this ink composition is safe for the human body, and there are no particular limitations on the environment in which the composition is used.</p> |
