| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an image forming paper which has a preventive effect against forgery and alteration due to duplication using a color copy machine, etc., does not require a specific and expensive ink, a medium/machine requiring cost, etc., is applied in an ordinary offset printing process, and further has a copy-warning technique effective even for a glossy paper which has been difficult in treatment. <P>SOLUTION: A muddy or black substrate, which has a white pattern consisting of a fine dot or a narrow line, is arranged on a mat coat paper, and a latent image consisting of a transparent varnish pattern is formed on the substrate. <P>COPYRIGHT: (C)2012,JPO&INPIT |
