| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a card that makes signature handwriting clear and is easy to sign on regardless of kind of writing implements to use and moreover makes it hard to counterfeit the signature on a sign panel in a card having the sign panel. SOLUTION: In the card made by laminating a card base material and a cover film, a developer layer containing a developer is provided on at least one part of the card base material and a coupler layer containing a coupler is provided on the cover film. The developer layer and the coupler layer are laminated to make a coupler transferred from the coupler layer to the developer layer by the pressure of a pen and colored so as to be separable. When the signature is written from the cover film side with the writing implement, the coupler in the coupler layer transfers and permeates into the developer layer by the pressure of pen, which makes a specific hue color. Thereafter, by peeling the cover film off the card, even if the written information (signature) is written with a general writing implement and the signature is forged, it can be discriminated easily that the signature is counterfeited one.</p> |
