Patent ID: 7243952

Claim:
An authenticity discriminable printed pattern in which a latent image that is formed on a collective pattern cannot be visually identified easily under ordinary visible light but becomes visible upon being irradiated with UV rays, said authenticity discriminable printed pattern comprising: a basic image formed on a base material, said basic image including: a latent image portion; and a latent image peripheral portion, wherein the latent image portion and the latent image peripheral portion are difficult to be discriminated under the ordinary visible light, each of the latent image portion and the latent image peripheral portion is formed from a set of dots continuously laid out at a predetermined period, a resolution of the dots of the latent image portion is different from that of the dots of the latent image peripheral portion, the latent image portion and the latent image peripheral portion have the same percent dot area per unit area and different dot peripheral lengths per unit area, and the latent image portion and latent image peripheral portion are printed by color fluorescent ink.