Means for assuring proper orientation of the film in an...

G - Physics – 03 – C

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G03C 5/16 (2006.01) G03C 1/46 (2006.01) G03C 5/17 (2006.01)

Patent

CA 2087127

MEANS FOR ASSURING PROPER ORIENTATION OF THE FILM IN AN ASYMMETRICAL RADIOGRAPHIC ASSEMBLY Abstract of the Disclosure An asymmetrical radiographic element is disclosed comprised of a transparent film support, green sensi- tized silver halide emulsion layer units of differing sensitometric characteristics coated on opposite sides of the film support, and a processing solution decolorizable means for reducing crossover to less than 10 percent. The element is positioned between intensi- fying screens and mounted in a cassette for exposure to X-radiation. A processing solution decolorizable pentamethineoxonol dye with insignificant absorption at 550nm is incorporated into an overcoat layer to distin- guish which of the emulsion layer units is positioned nearest a source of X-radiation during exposure.

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