| 摘要 |
PURPOSE:To uniformize a color developing concentration by mixing a discharge agent against the top heat sensitive color developing layer of two heat sensitive color developing layers, a bonding agent, and a bridging agent. CONSTITUTION:A recording material is composing of two heat sensitive color developing layers having different color developing temperature and color tone, the top heat sensitive color developing layer being formed by leuco dyestuffs and phenol substance or acidity substance. Further, the discharge agent having a discharge effect and the discharged agent layer which contains mainly the soluble bonding agent such as denatured starch are provided for the top layer of heat sensitive color developing constituent between the top layer and the bottom layer. Then, the bridging agent having a bridging effect against a soluble bonding agent, for example, melamine resin, urea resin and the like is mixing within the discharge agent. This enables said dridging agent to improve water proofing of the discharge agent, thereon coating the low temperature heat sensitive color developing layer forming liquid to prevent from the effluent of discharge agent into the forming liquid for stabilizing the quality. |
