| 摘要 |
PURPOSE:To provide a recording method and displaying method of employing a new discoloring composition using a discoloring agent of being color-changed by basiclty, heat sensitive recording medium and display medium containing a composition, and the recording medium or display medium. CONSTITUTION:The heat sensitive recording method and display method are characterized In that the thermal discoloration composition includes a discoloring agent capable of being color-changed in contact with a basic substance and trichloroacetic acid. The heat sensitive recording medium and display medium is provided with a recording layer containing heat discoloring compostition. By the use of the heat sensitive medium or display medium and applying heat in the form of a picture Image at higher temperature than the thermal decomposition temperature of trichloroacetic acid contained in the recording medium or display medium, a positive or negative recording picture image or display picture image is obtained. |
