| abstract |
(57) [Problem] To provide a thermosensitive recording medium which is easily adjusted in sensitivity, has excellent gradation, and has a high maximum recording density. SOLUTION: As one means for solving the above-mentioned problems, in a single-color heat-sensitive recording material having a heat-sensitive recording layer containing a leuco dye and a color former on one surface of a support, the present invention provides: As the leuco dye, particles using the leuco dye alone and composite particles of the leuco dye and the resin are used. |