| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To inexpensively provide a forgery prevention medium and a forgery prevention seal, which emphasize the color shift effect resulting from viewing angles of a iridescent multi-layer film constituted of two or more kinds of plastic films laminated in multi layers, allow easy visual authenticity decision, and make illicit actions, such as forgery, alternation and falsification difficult. <P>SOLUTION: The forgery prevention medium 1 is so constituted that a light absorbing layer 4 is provided, as at least one pattern, on a part of the rear face of the iridescent multi-layer film 3 constituted of two or more kinds of thin films alternately laminated, and a metal deposited layer 5 is provided almost all over the iridescent multi-layer film including the pattern of the light absorbing layer 4. The forgery prevention seal 2 is obtained by providing an adhesive layer on the metal deposited layer 5 of the forgery prevention medium 1. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
