| 摘要 |
PURPOSE:To provide a security card which is difficult to be forged or altered and its reader. CONSTITUTION:A reversible heat sensible layer 3 which is positioned at an upper layer of a card base material 1 and repeats coloring and discoloring by variation in temperature, an infrared reflecting layer 5 which is positioned at an under layer of the card base material 1 and has an infrared reflecting property, and a background layer 2 provided between the card base material 1 and the reversible heat sensitive layer 3 are provided. A bar code like identification code 6 having an infrared absorbing property is formed on an under surface of the infrared reflecting layer 5 to compose a security card. |
