| abstract |
A heat sensitive original sheet for stencil printing made of a laminate of a paper sheet and a biaxially oriented polyester film having a melting point of 150 DEG to 240 DEG , a thickness of 0.2 to 3 mu m, an average refractive index of 1.570 to 1.578, a thermal shrinkage stress of 100 to 800 g/mm2 after being treated at 80 DEG C. for 10 seconds, a thermal shrinkage factor of 5 to 50% after being treated at 80 DEG C. for 10 minutes, a shrinkage factor of 15% or less after being treated in toluene at 25 DEG C. for 10 minutes, and a center line average surface roughness of 0.02 to 0.3 mu m, which original sheet is excellent in a perforation sensitivity, resistance to curling, and resolution and image density of a printed image. |