| 摘要 |
<p>PROBLEM TO BE SOLVED: To impart forgery/counterfeit preventive effects by a copying machine, to securities, etc., by a method wherein in a curved image line of a part where a latent image is applied, at a part where each pair of image lines cross with each other, the image lines of either one pair of respective pairs of the image lines, are deleted on the inside of the image lines of the other pair of the image lines. SOLUTION: In image lines 13 at a part where a latent image is applied, i.e., in the image lines which become a pair with two or more lines, to either one pair of the image lines 13 of respective pairs of the image lines 13, when the other pair of the image lines 13 is located at the internal range of the other pair of the image lines 13, at a cross point 10' where latent image curves 14 of respective pairs of the image lines 13 cross with each other, only for that area, the inside of the other pair of the image lines 13 is deleted. By this method, even if the part where the image lines which become pairs with two or more lines cross with each other in the latent image applied area, seems to exist, actually, the cross of the image lines with each other does not exist in the area where the latent image is applied. Therefore, the density of the image lines at the cross part can be prevented from becoming higher.</p> |
