| 摘要 |
PURPOSE:To easily record peculiar information without subjecting a card base material to plastic working by forming a peculiar information recording part with a transparent base material and recording peculiar information on the base material with a light shielding material. CONSTITUTION:A light shielding material 7 is provided on a part of a base material 4 to form a peculiar information recording part 3 of an optical card 1. For example, black ink as the light shielding material 7 is printed out on the base material 4 to form this recording part 3. The light shielding material 7 is removed by engraving to record characters as peculiar information. Though the light shielding material 7 is provided on the surface of the base material 4 in this case, it is preferable that the light shielding material 7 where peculiar information is written is interposed between base materials 4 when importance is given to preservability of peculiar information. Thus, peculiar information is recorded on the optical card without plastic working and peculiar information recorded by the light shielding material 7 is projected to a photosensitive recording medium by irradiating the peculiar information recording part with light and is transferred and recorded. |
