| 摘要 |
PROBLEM TO BE SOLVED: To enhance fixity and improve the preservability of a colored image after re-heating by containing an achromatic or hypochromic dye precursor and a developer having two or more sulfonyl urea groups in one molecule, and also containing a substance having a specific value of a melting temperature in a primer layer. SOLUTION: The fixation thermal recording body is rendered readable on printing by reducing a coloring ability of a non-printed part through the heat of a sheet after heat printing and thereafter keeping a contrast between the printing and the non-printed part even when undergoing high heat, and it is formed by providing a primer layer and thermal recording layer on a sheet-like base body. Herein, the thermal layer is formed of a substance containing an achromatic or hypochromic dye precursor and a developer having two or more sulfonyl groups in one molecule. On the other hand, the primer layer is formed of a substance of a melting temperature of 40 deg.C or higher that reduces a developing ability of the developer, i.e., matter containing at least a substance of one kind selected from a basic compound. |
