HEAT-SENSITIVE RECORDING MATERIAL FOR OFF-SET PRINTING

To reduce discoloration in a recording layer.SOLUTION: There is proposed a heat-sensitive recording material containing a sheet-like supporter (1) having a front surface and a back surface positioned in an opposite side from the front surface, and a heat-sensitive recording layer (3) arranged on at least one of two surfaces of the sheet-like supporter (1), in which the heat-sensitive recording layer (3) contains at least one kind of dye precursor and at least one developer which has reactivity with at least one kind of dye precursor, and suitable for off-set printing, in a novel heat-sensitive recording material at least one heat-sensitive recording layer (3) arranged on at least one of two surfaces of the supporter (1) contains a particle with an organic surface, and size of the particle in a thickness direction of the sheet-like supporter (1) and the heat-sensitive recording layer (3) is larger than thickness of the heat-sensitive recording layer (3).SELECTED DRAWING: Figure 1 【課題】記録層における色落ちを低減する。【解決手段】表面および表面とは反対側に位置する裏面を有するシート様支持体（１）、シート様支持体（１）の２つの面の少なくとも１つに配置される感熱記録層（３）を含み、前記感熱記録層（３）が、少なくとも１種の染料前駆体および前記少なくとも１種の染料前駆体と反応性のある少なくとも１種の顕色剤を含む、オフセット印刷に適した感熱記録材料が提案され、新規な感熱記録材料は、支持体（１）の２つの面の少なくとも１つに配置される少なくとも１つの感熱記録層（３）が、有機表面を備えた粒子（４）を含み、シート様支持体（１）および感熱記録層（３）の厚み方向における粒子の大きさが、感熱記録層（３）の厚みより大きいことを特徴とする。【選択図】図１