| 摘要 |
PURPOSE:To provide the titled material with improved clearness and contrast by raising the density of picture colors in the low temperature color developing layer which is made to contain a specific compound with a leuco dye as a color developing agent on the upper layer of two heat-sensitive color developing layers that have different color developing temperatures and color tones. CONSTITUTION:In a multi-color heat sensitive recording material in which two heat sensitive color developing layers that have respectively different color developing temperatures and different color tones in color development are formed on a supporting body by stacking, and an achromatic agent is contained in the upper layer or between the two layers, colorless or light color leuco dye (for example, fluoran series, etc.) is used as a color developing agent in the above mentioned upper color developing layer, and at the same time it is made to contain compounds (for example, 4-hydroxybenzoic acid phenyl ester) of the formulaI(X is halogen, nitro, H; Y is H, alkyl, etc.; n, m are 0-3), the formula II (X' is H, OH, etc.; Y' is H, alkyl, etc.) and/or the formula III (R1 is H, methyl, etc.; R2 is H, OH, etc.), preferably by 2-5 times in weight basing of the weight of the leuco dye. |
