METHOD FOR PREVENTING OVD-FORMED MEDIUM FROM BEING FORGED, OVD TRANSFER FOIL AND OVD-FORMED MEDIUM TREATED FOR FORGERY PREVENTION

摘要

PROBLEM TO BE SOLVED: To make genuineness determinable a plurality of times and easily realize the genuineness determination without being restrained by the pursuit of the high definition of an image and resistance and without the use of a detection device, when a laten image part is added to an OVD-formed medium to upgrade anti-forgery effects. SOLUTION: This OVD-formed medium 1 is manufactured by using an OVD transfer foil having an oriented latent image part 23 which is transparent through naked eye viewing and is visible under eye observation using a polarized light film 14 and is provided in the latent image forming layer 13 of the OVD transfer foil comprising the latent image forming layer 13, an OVD layer 12 and an adhesive layer 15, formed on the surface of a support 11.