| 摘要 |
<p>PROBLEM TO BE SOLVED: To overcome such problems that although a rewritable recording medium having a recording layer, which presents a color developing property when a first thermal energy is applied, and discoloring property when a second thermal energy is applied, on the supporting body surface can delete recording and can record again, there is a limit in the number of times of usage, and by a repeating usage of a larger number of times, the reproducing action deteriorates, and the deletion is not totally performed, and the recording may remain, or on the contrary, the recording does not clearly appear. SOLUTION: A detecting sensor is arranged on a displaying device wherein a recording means which performs recording and a deleting means which deletes the recording are arranged. Then, a printing number of times marker provided on this rewritable recording medium is detected, and the detected number of times and a recording limit number of times which is set in advance are compared. Then, when the detected number of times has reached the recording limit number of times, that situation is notified.</p> |
