Direct-positive photographic material

Details Direct-positive photographic material Direct-positive photographic material

G - Physics

03

C

96/100, 96/216

G03C 1/485 (2006.01)

Patent

CA 1062531

(Abstract of the Disclosure) An improvement in the stability of a direct positive emulsion layer in photographic material is obtained by the inclusion of a compound which provides in the image- wise exposed and developed direct positive emulsion layer a greater difference between the density of the image in the unexposed parts of the layer and the density in the exposed parts. The compound provides in the emulsion a characteristic curve related to a density value at maximum density which is at least twice the analogous density value at minimum density.

223839

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