| 摘要 |
PROBLEM TO BE SOLVED: To provide a forgery-preventive printed matter having an effect of changing images depending on a condition of diffusive reflected light or regular reflected light, which gives high visibility of a visible image under the condition of diffusive reflected light.SOLUTION: The forgery-preventive printed matter includes a print pattern in at least a part on a substrate, which has a hue different from that of the substrate. The print pattern comprises superposition of an information image formed of a bright ink and a background image formed of a chromatic ink having the same hue as that of the bright ink and showing a pale hue compared to the bright ink under the condition of diffusive reflected light. The background image is divided into an information part and a background part by differentiating an area ratio per unit area; and the information image and the background image are made isochromatic when viewed under the condition of regular reflected light. |
