| 摘要 |
PURPOSE: To obtain a multicolor thermal recording medium not generating the color mixture of a low temp. developed color hue with a high temp. developed color hue and obtaining a sharp high density image by adding an org. compd. represented by a specific formula and a thermoplastic resin having color erasing action to a low temp. color forming layer. CONSTITUTION: A multicolor thermal recording medium for thermally recording an image having a plurality of hues is obtained by laminating high and low temp. color forming layers developing different hues to a support and both color forming layers contain at least an electron donating color forming compd. having a lactone ring and an electron acceptive compd. having a phenolic hydroxyl group as main components. The low temp. color forming layer contains at least one kind of an org. compd. represented by formula (wherein R1 is an alkyl group, an aryl group, an alkenyl group or a hydroxyalkyl group, R2 and R3 are hydrogen, an alkyl group, an aryl group, a hydroxyalkyl group or an alkenyl group and R4 is an alakylene group) and a thermoplastic resin having color erasing action. |
