Chemical Patents (Class 178/62)
  • Patent number: 3935333
    Abstract: A transparent image forming sheet and method for forming transparent images on the sheet, in which the sheet comprises a transparent film base, an opaque conductor layer being formed on one side of the transparent film base and a semiconductive layer containing powder of metallic oxide semiconductor, a mixture of non-conductive metallic compound and conductive substance, or polymeric semiconductor, and the method comprises the steps of applying electric voltage between the semiconductive layer and the conductor layer through recording stylus and development using corrosive liquid and/or dissolving solvent.The transparent image sheet can be used for several optical purposes including the preparation of a printing plate for photographs without the screen process.
    Type: Grant
    Filed: December 15, 1972
    Date of Patent: January 27, 1976
    Assignee: Kansai Paint Company, Ltd.
    Inventors: Harunobu Muneoka, Tuguo Nezu