| 摘要 |
<p>PURPOSE:To provide a printed matter which can take effect of checking effectively to copy of an evil intention and is formed into a various pattern. CONSTITUTION:A pattern whose dissolution capacity levels by a copying machine are different from each other are used as a copy checking pattern to be formed on a printed matter, for example, a gradation is provided on distances between half-tone dots and lines or a thickness of parallel lines and a distance between the myriad lines of a screen tint. Therefore, since a copy checking pattern is copied into a different form by a dissolution level of the copying machine, discrimination that it is a copied matter can be performed easily. The copy checking pattern is printed by multi-color printing for which a plurality of colors are used, for example, rainbow printing allowing to express a mixed part 2b by mixing up a red 2a and blue 2c with each other or stuck- printing and a copy checking function can be displayed to the various copying machines whose optical properties are machine.</p> |
