Production method of forgery prevention medium and its authenticity determination method and forgery prevention medium

摘要

PROBLEM TO BE SOLVED: To provide a forgery preventive medium more difficult in forging and easy to discriminate visually whether the medium is forged one or not, even in the forgery preventive medium using a polarized light latent image.SOLUTION: The forgery preventive medium is composed by laminating, on a base material 11, a reflection layer 12, a forming layer 13 having a surface exhibiting an irregular state, an orientation control part 16 for orienting a liquid crystal, a liquid crystal layer 14 having a portion different in a thickness by burying the irregularity and oriented along a prescribed direction by an effect of the orientation control part, and a protection layer 15. in this order, and the orientation control part 16 has a plurality of orientation directions, in the forgery preventive medium.