abstract |
(57) 【Abstract】 PROBLEM TO BE SOLVED: To provide a multicolor heat-sensitive recording material capable of recording a clear multicolor image, having little background fog, and high whiteness. SOLUTION: In the thermosensitive coloring layer on a support, composite fine particles comprising polyurea or polyurethane and a first dye precursor, and solid fine particles of a second dye precursor that develops a different color from the first dye precursor. And a first and a second dye precursor, and a developer that reacts under heating to develop a color of these, the second dye precursor develops a color when heated at a low temperature, and the first dye precursor is further heated at a high temperature. A multicolor thermosensitive recording material adapted to develop color. |