| 摘要 |
PURPOSE:To provide the titled material which enables a black based low-temperature color formation and a clear high-temperature color formation with a high color forming density while being free from color extinguishing with time by laminating a specified high-temperature formation layer, an intermediate layer containing a water-soluble high polymer binder and a filler, a color extinguishing agent layer and a low-temperature color formation layer on a support. CONSTITUTION:A high-temperature color formation layer containing a leuco dye and a developer, a color extinguishing agent layer containing one kind or more of color erasing agents such as morpholine based color erasing agent and fatty amin based color erasing agent and a low-temperature color formation layer containing a leuco dye and a diphenyl thiourea derivative as given by the formula (wherein R1 and R2 each represent H, halogen, trifluoromethyl or 1-4C alkyl) are laminated sequentially on a support while an intermediate layer mainly composed of a water-soluble high polymer binder (e.g. polyvinyl alcohol) and a filler (e.g. zinc stearate) is provided between the color extinguishing agent layer and the high-temperature color formation layer to obtain a desired material. |
