Organic chloro- or bromo-compounds used in direct positive...

Details Organic chloro- or bromo-compounds used in direct positive... Organic chloro- or bromo-compounds used in direct positive...

G - Physics

03

C

96/109

G03C 1/10 (2006.01) G03C 1/485 (2006.01)

Patent

CA 1142788

ORGANIC HALOGEN COMPOUNDS USED IN DIRECT POSITIVE EMULSIONS ABSTRACT An organic halogen compound is added to a fogged direct positive silver halide photographic emulsion, and the emulsion is digested prior to coating on a support. Increased sensitometric speed and stability result. Brominated quinolines and quinoxalines are particularly effective.

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