FORGERY PREVENTIVE PRINTED MATTER

摘要

PROBLEM TO BE SOLVED: To form a forgery preventive printed matter showing distinctively the difference from a manuscript by causing a clearer moire on the background of a copying matter, and also form a forgery preventive printed matter being difficult to be forged by a personal computer. SOLUTION: A commuter pass 1 being a forgery preventive printed matter is printed on its background with a whirlpool pattern 2 or a matter with the whirlpool of the pattern 2 made unit a polygonal shape. Also, the distances of adjacent lines constituting the whirlpool of the pattern 2 are gradually expanded or contracted from the center toward the outside. Printed herein is a belt-like pattern 3 used with colors distributed outside of the color reproduction area of toner on chromaticity coordinates. In addition, a dark color ink is employed in the patter 2.