| 摘要 |
PROBLEM TO BE SOLVED: To provide a transparent card, which is a machine read CD card and, in the case of an ATM card, the value of the transmission density of which satisfies the values of the transmission density of card in various standard values prescribed among banks and device makers. SOLUTION: The transparent card including at least one sheet of transparent plastic sheet, in which a material transmitting the light having a visible wavelength region of 400 to 700 nm and absorbing an infrared wavelength of 850 to 1,000 nm is kneaded, and the base of the card is formed by the laminated structure of a plurality of plastic sheets under the condition that the transmission density of the base is below 1.0 in the visible wavelength region and 1.1 or more in the infrared wavelength region, is provided. |
