| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a card which can realize a high-contrast making groove for showing a letter or the like and can be formed with excellent visibility and which is hard to disguise or forge. SOLUTION: A pattern coat layer 2 having a minute pattern is provided in a part or the whole of the surface of the card, and the marking groove 4 being a part wherefrom the pattern coat layer 2 is so removed partially as to show a desired mark, letter or the like is provided by a laser beam or the like. It is made difficult to attain conformity with the color tone and position of the pattern part and thus the card is hard to disguise or forge.</p> |
