Silver halide emulsions containing aromatic latent image...

Details Silver halide emulsions containing aromatic latent image... Silver halide emulsions containing aromatic latent image...

G - Physics

03

C

96/143, 96/196,

G03C 1/34 (2006.01)

Patent

CA 1188911

Abstract of the Disclosure: Photographic silver halide emulsions are protected against latent image fading by aromatic latent image stabilizing compounds having the structure: Image wherein: R1 is hydrogen, alkyl, or aryl; R2 and R3 are each individually hydro- gen, alkyl, alkoxy, carboxy, alkoxycarbonyl, or aminocarbonyl; X is a middle chalcogen; Z represents the atoms completing an aromatic nucleus; n is an integer of 1 or 2; and M?n cation of valence n chosen from the group consisting of an onium ion, an ion from Group IA or IIA, and a metal ion from Group IIB, VIIB, IVA, or VA.

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