Heat sensitive recording sheet

摘要

There is provided a heat sensitive recording sheet comprising a support and a heat sensitive color forming layer excellent in mechanical adaptability and recording characteristics and capable of providing clear copies. This recording sheet has a smoothness of at least 150 seconds measured according to JIS P8119, an opaqueness of 30-50% according to JIS P8138 and a stiffness in longitudinal direction of 35 or less in Clark value according to JIS P8143 and the support is a synthetic paper.