Title:
真偽判別可能な印刷物及びその作製方法
Document Type and Number:
Japanese Patent JP4085175
Kind Code:
B2
Abstract:
This invention provides authenticity discriminable printed matter in which a latent image cannot be visually identified under ordinary visible light but appears upon being irradiated with UV rays. A basic image is formed on a base material. The basic image is made of a latent image portion and latent image peripheral portion. The latent image portion and latent image peripheral portion cannot be visually discriminated, and each of them is formed from a set of dots continuously laid out at a predetermined period. The 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 latent image peripheral portion have the same percent dot area per unit area and different dot peripheral lengths (contour lengths) per unit area. The latent image portion and latent image peripheral portion are printed by color fluorescent ink, thus obtaining printed matter.
Inventors:
Island Kazuhiko Ta
Okumura Hisashi
Kiuchi Masato
Okumura Hisashi
Kiuchi Masato
Application Number:
JP2002501665A
Publication Date:
May 14, 2008
Filing Date:
June 08, 2001
Export Citation:
Assignee:
National Printing Bureau
International Classes:
B41M3/14; B42D15/10; G07D7/12
Domestic Patent References:
| JP10202999A |
Attorney, Agent or Firm:
Kenji Yoshitake
Hidetoshi Tachibana
Yasukazu Sato
Hiroshi Yoshimoto
Yasushi Kawasaki
Hidetoshi Tachibana
Yasukazu Sato
Hiroshi Yoshimoto
Yasushi Kawasaki