Photographic elements containing ballasted electron-...

Details Photographic elements containing ballasted electron-... Photographic elements containing ballasted electron-...

G - Physics

03

C

96/1, 260/168.1,

G03C 1/40 (2006.01) G03C 7/00 (2006.01) G03C 7/305 (2006.01) G03C 8/00 (2006.01) G03C 8/10 (2006.01)

Patent

CA 1111842

Abstract of the Disclosure . Photographic elements, processes for forming images in photographic elements and new compounds are disclosed. Generally, the invention relates to ballasted electron- accepting nucleophilic displacement compounds; after acceptance of at least one electron (reduction) by a nucleophile precursor group, the compounds are capable of undergoing intramolecular nucleophilic displacement to release a diffusible moiety, such as an image dye or a photographic reagent. In certain embodi- ments, the ballasted electron-accepting nucleophilic displacement compounds are used in combination with electron donors and electron-transfer agents. The processes disclosed are parti- cularly useful in providing positive transfer images using negative-working silver halide emulsions. -1-

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