FORGERY PREVENTING INK AND FORGERY PREVENTING PRINTED MATTER

摘要

PPROBLEM TO BE SOLVED: To provide forgery preventing ink capable of easily discriminating a forged matter formed by using a copier having high resolving power. PSOLUTION: The forgery preventing ink which is prepared by mixing a pearl pigment and a fluorescent pigment is used to easily discriminate copied matter by utilizing a property having brightness peculiar to the pearl pigment and becoming different in hue by a looking angle and a property emitting a sharp hue peculiar to the fluorescent pigment. Further, the reproduction of colors by color copier is difficult and forged printed matter using a fluorescent pen also becomes difficult and the visual discrimination of copied matter becomes easy. PCOPYRIGHT: (C)2004,JPO