| 摘要 |
<p>PURPOSE:To easily and surely discriminate the copied forgery of such information recording media as the claim checks, the membership cards, etc., of ordinary sheets. CONSTITUTION:An address column 4 where the visible issue number 3 and address 7 are written is provided on the surface of a claim check 1 together with an optical read information recording part 9 including a foundation part 10 which is entirely printed by the ink containing no carbon and a bar code 11 of a toner including carbon printed by a non-impact printer. A satisfactory difference of reflection factors is secured between the ink and the toner and therefore the code 11 can be read in regard of an infrared bar code reader which uses the wavelength of a near infrared area. If the check 1 is copied by an ordinary copying machine using the wavelength of an ultraviolet area or a visible light beam area, the reflection factors of both ink and toner parts are reduced. Therefore the copied code 11 cannot be read by the infrared bar code reader and a forged check 1 is decided.</p> |
