AFTER FORMATION OF WATERMARK-LIKE PATTERN AND PAPER WITH WATERMARK-LIKE PATTERN MADE BY USING THE AFTER FORMATION

摘要

PROBLEM TO BE SOLVED: To provide a method for after formation of a watermarklike pattern, capable of simply introducing an arbitrary watermark-like pattern into paper after a paper making process, bringing the pattern into paper at a low cost even in a small lot of number of shipping and providing the watermark pattern greatly effective for coping with counterfeit and defacement due to no change in quality and no deformation and to obtain a paper with a formed watermark- like pattern by using the method. ;SOLUTION: A block having a pulling transfer of a watermark pattern of arbitrary shape composed of letter, number or an arbitrary pattern is pressed under given pressure against a fixed position of paper made by mixing a plant fiber pulp with at least ≥10 wt.% of synthetic fiber and making the mixture into paper, and the synthetic fiber at a part of the pressed paper is melted by heat generated by the pressing and/or another heat source to form a desired watermark-like pattern by after formation.;COPYRIGHT: (C)2000,JPO