| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a luminous medium that enables a determination to be made easily and rapidly as to whether securities etc. are forgery or not. <P>SOLUTION: The luminous medium 10 constituting securities includes a luminous image 12. The luminous image 12 includes a picture area 20 formed on a base 11 using a first fluorescent ink 13 containing a first phosphor, and a background area 25 formed on the base 11 using a second fluorescent ink 14 containing a second phosphor. When UV-A is irradiated, the first fluorescent ink 13 and the second fluorescent ink 14 respectively emit lights which are visually recognized as mutually different colors. Further, when UV-C is irradiated, the first fluorescent ink 13 and the second fluorescent ink 14 respectively emit lights which are visually recognized as mutually different colors, and of which colors are different from the colors visually recognized when the UV-A is irradiated. <P>COPYRIGHT: (C)2012,JPO&INPIT |
