| 摘要 |
PURPOSE:To use the plane of a card effectively, and to display a balance clearly by providing the printing area of a bit of balance information made of a photochromic material. CONSTITUTION:A valuable card 25 is formed so that a magnetic coating film 25b is formed over the whole plane at the back plane side of a sheet shaped base material 25a consisting of a sheet of paper or a plastic, meanwhile, at the surface plane side, a printing area 25c are sectioned, and a photochromic material coating film 25d is laminated and formed at that area. The photochromic material is a raw material that discolors by applying a heat, and discolors to an original color by irradiating light. Meanwhile, the whole plane of the back plane side of the valuable card 25 forms a magnetic recording plane 25e, and at the same time, it can be used for an advertising area. |
