| abstract |
(57) [Summary] (Modified) [Problem] A certificate that is difficult to forge, has high credibility, can store various personal information of the owner, is convenient to carry, and conforms to official documents. provide. SOLUTION: A card-shaped certificate 1 is stored in an IC memory layer 4. Is formed on the upper surface of the card base material 2 having the embedded therein, and the magneto-optical storage layer 5 or the magnetic recording layer is formed on the back surface, and this is covered with an overcoat layer. The layer 3 includes a face photograph 3a with ID information latent and an infrared reflection and absorption ink 3b, Forgery prevention means such as magnetic ink 3c, minute characters 3d, and fluorescent ink 3e are printed. The face photograph 3a forms an image by color printing of CMY or CMYK from a color photograph of the certificate holder himself, and superimposes ID pattern information that is normally invisible on the yellow portion of the CMY or CMYK color. It is an image. |