| 摘要 |
<p>A reversible two color thermal recording material comprising a supporting material and, supported thereon, a reversible thermally coloring composition which uses a colorless or light-colored electron-donating dye precursor and an electron-accepting compound and can form a colored state or a discolored state depending on its temperature heated and/or the cooling speed after heating, characterized in that said reversible thermally coloring composition comprises at least two components which are different in color tone from each other, are present separately and independently, and also are different from each other in the crystallization speed of said electron-accepting compound which causes the change from coloring to discoloring state.</p> |
