Diffusion-transfer photographic method and film unit therefor

Details Diffusion-transfer photographic method and film unit therefor Diffusion-transfer photographic method and film unit therefor

G - Physics

03

C

96/23

G03C 8/44 (2006.01)

Patent

CA 1062944

TITLE OF THE INVENTION Diffusion-Transfer Photographic Method And Film Unit Therefor ABSTRACT OF THE DISCLOSURE Diffusion-transfer photographic method and film unit accord- ing to which a film unit comprises a rearmost opaque sheet which protects the film unit from light, prevents light from reaching other photosensitive elements in a camera during exposure of the film unit, and is detachable subsequent to processing of the film unit to permit viewal of a developed image from the rear of the film unit, whereby image-reversal means are not required in the exposure system of an associated camera. The opaque sheet being external to the chemical system for development and processing in the film unit, latent image and positive image layers may be near to one another and diffusion and transfer of image elements are unhindered and are effected in a shorter time. (1)

235049

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