| 摘要 |
<p>PURPOSE:To improve preservable stability at and under a high temp. and high humidity by additionally recording the data on information on the optical card formed by using an optical recording material essentially consisting of an org. silver salt oxidizing agent, a hydrophobic org. high-polymer binder and a reducing material at every time, optically reading this information and displaying and reproducing the information. CONSTITUTION:The data on the information is additionally recorded at every time on the optical card formed by using the optical recording material formed by heating the optical recording material comps. essentially consisting of the org. silver salt oxidizing agent, the hydrophobic org. high-polymer binder and the reducing material. In addition, the information recorded on the optical card is optically read and the information is displayed and reproduced. The org. silver salt oxidizing agent is exemplified by a low-molecular org. silver salt oxidizing agent soluble or insoluble in an org. solvent and a high-molecular org. silver salt oxidizing agent. Since this material is used for additional recording, the rewriting of the data is not possible. Since the optical recording material is formed by using the hydrophobic org. high-polymer binder as one of the optical recording compsn., the material is strong to moisture and, therefore, the durability of the card is good and the card has the data reliability.</p> |
