| 摘要 |
PROBLEM TO BE SOLVED: To provide a two-color heat-sensitive recording body wherein a recorded section, which is made to color on the low temperature side, is clearly projected, and its using method. SOLUTION: This two-color heat-sensitive recording body has a heat-sensitive recording layer containing a leuco dye which colors on a low temperature side, a leuco dye which colors on a high temperature side, and a coloring agent, on a supporting body. In such a two-color heat-sensitive recording body, the leuco dye which colors on the low temperature side is used in a manner to become 5 to 50 wt.% to the leuco dye which colors on the high temperature side, as a means to solve the problem. Also, a fluorescent white dye is contained in the heat-sensitive recording body. In addition, regarding the using method of the two-color heat-sensitive recording body, the two-color heat-sensitive recording body is used in such a manner that the optical density of a recorded section, which is made to color on the low temperature side of the heat-sensitive recording layer, may become 0.2 to 0.8. |
