Direct positive films

Details Direct positive films Direct positive films

G - Physics

03

C

G03C 1/485 (2006.01)

Patent

CA 2054716

DH-16 ABSTRACT Direct positive photographic films are disclosed having novel density enhancers of the formula Image wherein A is oxygen or sulfur, and B is selected from the group consisting of hydrogen, alkyl, haloalkyl, hydroxyalkyl, alkylamino and alkoxy. Photographic materials coated with emulsions having these density enhancers display good optical density while maintaining high speed capability.

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