| 摘要 |
PROBLEM TO BE SOLVED: To provide a print which prevents copying forgery by reliable appearance of a pattern showing a copy even in a recent, high-definition and high-quality copying machine and enables instantaneous determination of whether or not a print is a copy.SOLUTION: A printed image consisting of a first image region and a second image region is formed in at least a part of a substrate. In the first image region, a plurality of first elements composed of first coloring materials different in color tone from the substrate and a plurality of second elements composed of second coloring materials different in color tone from the substrate and the first coloring materials are arranged regularly. In the second image region, image elements different in color tone from the coloring materials forming the individual elements arranged in the first image region are arranged regularly to constitute synthetic colors with the coloring materials forming the individual elements of the first image region. The two regions becomes isochromatic in reflection light of visible light by adjusting the area ratios of the individual elements and/or the density of coloring materials forming the individual elements arranged in the two regions. |
