| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a forgery-preventing sheet with improved security characteristics of a document by providing a genuine/forgery discriminating part with a special constitution and additionally applying invisible or hardly visible ID information under an ordinary condition. <P>SOLUTION: The forgery-preventing sheet is provided with the genuine/forgery discriminating part 1a at a specified part of the sheet 1, and a base layer 3 is applied on this genuine/forgery discriminating part 1a with a thermochromic ink or a photochromic ink by printing or the like. In addition, the ID information 4 is printed on this base layer 3. A member constituting this ID information 4 has the same color as a color of an ordinary time of the thermochromic ink or the photochromic ink of the base layer 3, or the same color as a color of the sheet surface within the region of the genuine/forgery discriminating part 1a when the color of the ink at the ordinary time is transparent. <P>COPYRIGHT: (C)2004,JPO</p> |
