Sughrue, Mion, Zinn, Macpeak & Seas
Support for dye transfer type thermosensitive printing sheet
 A support for a dye transfer type thermosensitive printing sheet is disclosed, which comprises a porous film base having a biaxially stretched film of a thermoplastic resin containing an inorganic fine powder having adhered thereon a thermoplastic resin film having a centerline-average roughness of not more than 0.5 .mu.m as a surface layer on which a dye transfer type thermosensitive printing layer is to be provided, said surface layer having a thickness of from 0.3 to 1.5 .mu.m and a Bekk's smoothness of from 2500 to 7000 seconds, and said support having an opacity of not less than 70%, a density of not more than 0.91 g/cm.sup.3, and a compression ratio of from 15 to 35% under a stress of 32 kg/cm.sup.2. A dye transfer type thermosensitive printing sheet using the support of the invention has excellent surface smoothness and exhibits considerable compressibility and, therefore, shows improved adhesion or contact with a printing head to form an image rich in gradation. 
Oji Yuka Goseishi Co., Ltd.
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B41M Y10T Y10T B41M B41M B41M B41M Y10T
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Akira Akihiko
Iwai Ohno