| 摘要 |
PURPOSE: To easily and economically produce an identification card with a high protective standard by giving local information to a card having a laminate of two different colors with selective absorption characteristics and a carrier by laser ray, and generating color changes by selective removal area, chemical reaction or material mixing. CONSTITUTION: Three colored layers 12, 14, 16 which are colored, for example, in red, blue and green are applied to a card base 10. The uppermost layer 12 is red, the intermediate layer is blue, and the lowest layer is green. When colors for individual coloring layers 12, 14, 16 are selected, colors with boiling points and absorption characteristics as different as possible should be selected. Proper discoloration and color display are possible through removal of the colored layers 12, 14, 16 by partial evaporation, additional mixing by melting individual colored layers 12, 14, 16, or chemical reaction between coloring agents or of coloring agent with its surrounding substances. |
