| 摘要 |
PROBLEM TO BE SOLVED: To provide a heat-sensitive stencil paper with a processed part which is easily identifiable to other part because the color and/or the density of a perforated part make an ultra-sharp change during thermal processing of a printing plate. SOLUTION: In the heat-sensitive stencil paper printing with a porous support laminated on one of the faces of a thermoplastic film and a release agent layer formed on the other face, a leuco dye is added to either of the face sides of the thermoplastic film and a color developer is added to the other face side. For the color developer, a waxlike organic phosphate compound with a melting point of 60 deg.C or more is preferable for use. The color developer or the leuco dye can be added to an adhesive layer or the release agent layer on which the thermoplastic film and the porous support are adhesively laminated together.
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