摘要 |
PURPOSE:To obtain the titled recording medium capable of easily recording in multiple colors by electro-chromatic process and capable of deleting the record and being reused, by a method wherein an electrolyte solution containing a specified oxydation-reduction dye is infiltrated into and supported by a base such as a paper. CONSTITUTION:A solution containing two or more of oxidation-reduction dyes such as a fluoran compound of the formula, wherein each of Rx and Ry is hydrogen, a hydroxyl group, halogen, an alkyl group, a nitro group, an amino group or the like, and a supporting electrolyte such as tetrabutylammonium perchlorate is infiltrated into a base such as a paper, a fabric and film to obtain a recording medium 1. In using the recording paper 1 thus obtained, when different voltages are impressed, for example, between a drum 2 and a pen 3 and between the drum 2 and a pen 4 by power sources 8, 9, electric currents are passed through the recording paper 1, and the colors of the dyes contained in the recording paper 1 are developed in accordance with the voltages, so that records 5, 6 are obtained by moving the pens 3, 4 leftward and rightward while rotating the drum 2. |