| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a truth-false distinction printed matter in which perforating by a laser, etc., and printing by functional ink are combined, and to provide a truth-false distinction method of the printed matter and a truth-false distinction system. <P>SOLUTION: The truth-false distinction printed matter is formed of a base material 1, perforating 2 the base material by a laser, etc., and printing the front surface of the base material 1 with infrared transmission ink 5 and the rear surface with infrared absorption ink 6. In the case of observing with a visible light, both the front and rear surfaces cannot confirm the perforated holes, but in the case of observing with the infrared ray, in the observing from the front surface, the infrared transmission ink of the front surface is transmitted. The infrared absorption ink passed through the perforated hole 2 is observed as a black perforated pattern 7. In the observation from the rear surface, the infrared absorption ink of the rear surface is observed black, and the perforated hole 2 cannot be confirmed. <P>COPYRIGHT: (C)2008,JPO&INPIT |
