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US 4,618,574 AGranted
High contrast photographic elements exhibiting reduced pepper fog
AssigneeEastman Kodak Company
InventorAnthony Cavallaro
Life of this patent
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Abstract
A negative working photographic element is disclosed capable of producing a high contrast silver image. The photographic element is comprised of surface latent image forming monodispersed silver halide grains having a mean diameter of less than 0.7 .mu.m, a contrast enhancing arylhydrazide, and, in an amount sufficient to reduce pepper fog while maintaining high contrast a polyhydroxybenzene and a carboxyalkyl-3H-thiazoline-2-thione.
Claims18
A negative working photographic element capable of producing a high contrast silver image comprised of
- a support,
- a contrast enhancing arylhydrazide, and
- a gelatino-silver halide emulsion layer comprised of surface latent image forming monodispersed silver halide grains having a mean diameter of less than 0.7 .mu.m,
- further characterized in that said emulsion layer contains in an amount sufficient to reduce pepper fog while maintaining high contrast a polyhydroxybenzene and a carboxyalkyl-3H-thiazoline-2-thione.
1 more element
Dependencies are inferred from the claim text.