| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide forgery preventing paper making it impossible to form an exact duplicate thereon, even when a color copier, a color scanner, a computer, a color printer, or the like is utilized, and therefore making it possible to easily distinguish a duplicate from an original by visual inspection, and to provide a forgery preventing medium given by using the same. <P>SOLUTION: This forgery preventing paper is made by subjecting a conjugated fiber to papermaking so as to position the fiber at least on a surface of the paper, wherein the conjugated fiber has a laminated part formed by sequentially laminating two or more polymer thin films having refractive indexes different from each other and therefore exhibits iridescence. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
