| 摘要 |
PURPOSE:To make it possible to make easy printing and leave recorded informa tion to be deleted without generation of sticking phenomenon by adding a mold lubricant to a recording layer or forming a mold lubricant layer consisting of a mold lubricant on the recording layer. CONSTITUTION:When a recording layer 2 impregnated with an oxidation reduc tion color and a reduction agent in a base 1 is formed, a mold lubricant is added to the recording layer 2 or a mold lubricant layer 3 is formed on the surface of the recording layer 2. If the oxidation reduction color is methylene blue as a preferable example, L-ascorbic acid is used as a reduction agent. In this case, if the pH value is less than 4, the oxidation reduction potential of L-ascorbic acid becomes lower than that of methylene blue. This is favorable indication. An overdosage of the reduction agent for the oxidation reduction, color is preferable. Normally the formed is used at the ratio of more than 10 mols for a single mol of color. If the dosage of the reduction agent is too low, the shelf life of an obtained recording material becomes short. This is not a favorable indication. The recommended mold lubricants are silicone resin, fluorine resin, polyolefine resin and a variety of waxes. |
