| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide color copy preventive printed matter that can facilitate discrimination and recognition between a genuine thing and a forgery for the user of securities and the like. SOLUTION: The color copy preventive printed matter is featured such that a restraint latent image part such as characters consisting of ordinary printing ink is covered together with a non-latent image part 20 to be its background with a shielding layer 30 consisting of reversible thermochromic ink that can discolor and decolor at about 30 deg.C, set-solid, lines, or lattice-like patterns, and further the restraint latent image part 10 consisting of characters is made up of the same color as the shielding layer 30 consisting of reversible thermochromic ink or dots of 10-50%.</p> |
