| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a printed matter at an economical cost having a counterfeit preventive and checking functions capable of simply discriminating with view a color-copied duplication (counterfeit) from a discoloration of two kinds of patterns laid out on the screen. SOLUTION: This printed matter is made of print-forming at least two kinds of them among patterns constituting a screen with specific colors being respectively various in its color phases, wherein one specific color is copied through decoloration under constant duplication conditions of a color copying machine, other specific color is copied through discoloration so that the specific color can not be reproduced simultaneously in its colors even in any control of duplication conditions. Then, each combination is performed between the two kinds of mat printing patterns 2, 3, the mat printing pattern 2 and the plaindot background pattern 4, the mat printing pattern 2 and the ground pattern 5, and the mat printing patterns 2 and the background pattern 6 with a successive density gradation.</p> |
