| abstract |
PROBLEM TO BE SOLVED: To accurately and accurately determine authenticity by a simple method with high-quality face images and clear and high-quality printing, card face information having excellent durability, difficult to forge. An ID card having high productivity can be provided. SOLUTION: In an ID card having a color developing layer that develops a black color when irradiated with laser light on a card substrate made of polyester or polycarbonate, and forming an image or text information on the card face by laser light irradiation, the color developing layer An ID card on which format information is printed by offset printing using process ink. [Selection figure] None |