| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an antifalsifying printed material in which a dot image in a first dot region can be recognized under a visible condition and a dot image hidden in a second dot region is hardly recognized. <P>SOLUTION: This antifalsifying printed material is the printed material with a base material, on which a continuously gradated visible image and a continuously gradated invisible image are formed by two kinds of dot regions P1 and P2 under the condition that the continuously gradated visible image is formed by arranging a plurality of the first dot regions P1, while the continuously gradated invisible image is formed by doubly printing the second dot regions P2 within the first dot regions P1 by printing the first dot region P1 with colored ink including no infrared absorbing coloring matter, while printing the second dot region P2 with in including metallic powder or with transfer sheet including metallic foil. <P>COPYRIGHT: (C)2008,JPO&INPIT |
