| 摘要 |
PROBLEM TO BE SOLVED: To immediately read a desired part to be seen or listened to from an arbitrary place of the publication on the information recording disk by printing a recording information call code for calling the desired part in transparent ion ink. SOLUTION: The recording information call code 1 is printed in the transparent ion ink over characters or pronunciation symbols of a foreign language, printed in visible ink, like a foreign language teaching material, etc., and a sensor is applied, so that the pronunciation of the part on the information recording disk corresponding to the foreign language can be heard. Further, a visible contact mark 2 is added and printed at the desired part to be called. Namely, the recording information call code 1 is printed in a transparent state on printed matter of the publication printed in the visible ink and the information recording disk is read from the desired place. This transparent ink is extremely inexpensive and safe, so there is no large economical load even when the ink is used by a large amount. |
