| 摘要 |
PROBLEM TO BE SOLVED: To solve a problem of a waste disposal expense in association with its disposal in addition to a cost of arranging information data for business to be discarded by waste disposal of the data of a conference or the like prepared in a large quantity due to distribution to all attendants of the conference and most of the data spent and waste disposal after the end of the conference or an environmental problem, information data problem. SOLUTION: The information data for the business used for the conference or the like is obtained by giving a thermal energy to a rewritable recording medium having a recording layer exhibiting developability by applying a first thermal energy and exhibiting fadability by applying a second thermal energy on a support surface and developing and displaying necessary contents. In the case of correcting the data, the data is corrected by a writing instrument with an ink to be erased in reaction with water. After the use of the data, the data is cleaned, heated, color reduced to be returned to an original white state to be prepared for a next use. |
