| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a forgeryproof printed matter which can prevent copying by a color copying machine or the like, gives no influence to a design, and can be manufactured at a low cost by utilizing an existing printing apparatus. <P>SOLUTION: The forgeryproof printed matter 1 of the present invention is a forgeryproof printed matter 1 with a constitution wherein a phosphor 3 with a color of the same system as that of a sheet material 2 is provided on the surface 21 of the sheet material 2, and the phosphor 3 is excited by infrared rays to emit a light in a visible light region. In addition, as another embodiment, the forgeryproof printed matter 1 is provided with the phosphor 3 with a color of the same system as that of the sheet material 2 on the surface 21 of the sheet material 2, and has a constitution wherein the phosphor 3 is excited by ultraviolet rays to emit light in a visible light region. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
