| 摘要 |
PROBLEM TO BE SOLVED: To provide latent image printed matter in which a latent image rich in hues appears, without limiting hues in the latent image, by changing an observation angle under regular reflection light, in printed matter in which a plurality of latent images appear.SOLUTION: A convex image line group has a light-dark flip-flop property and/or a color flip-flop property, and is formed on at least a part of substrate by arranging a plurality of semicylindrical image lines having a first hue under regular reflection light. A latent image synthetic image is formed on the convex image line group and is composed of: a first latent positive image obtained by arranging a plurality of first latent positive image lines having a second hue different from the first hue under regular reflection light; and a first latent negative image obtained by arranging a plurality of first latent negative image lines having the second hue under regular reflection light at a phase different from the first latent positive image lines. |
