| 摘要 |
PROBLEM TO BE SOLVED: To obtain an image display medium having different optical diffraction structure (OVD) layer images one by one. SOLUTION: In the image display medium manufactured by forming a halftone image by transferring dot shape of infinitesimal area to a material to be transferred by a thermal head by using a transfer sheet constituted by laminating a release layer 22, OVD layer 23 and adhesive layer 24 on one surface of a support 21 and laminating a back coating layer on the other surface of the support 21, the dot of OVD is formed by combining three types of OVD patterns having spatial frequencies, so that an observing color at a specific observation point becomes any of three primary colors of RGB (red, green and blue). |
