| 摘要 |
PURPOSE: A forgery prevention paper is provided to facilitate checking the originality of the paper by being exposed latent images when the paper is copied for forgery. CONSTITUTION: A forgery prevention paper comprises a bottom background pattern(10), a latent image pattern(20), and a temperature changing pattern(30). The bottom background pattern has cross direction bands(11a) and vertical direction bands(11b). The cross direction band(11a) and the vertical direction band(11b) are composed of lines(11) having predetermined intervals. The bottom background pattern is accomplished by cross arranged the cross direction bands and the vertical direction bands by turns. The latent image pattern is composed of lines(21) and dots(22). On the line, a plurality of grooves(21a) is formed by arbitrarily carving one side wall. |
