Silver halide photographic light-sensitive material
AssigneeKonishiroku Photo Industry Co., Ind.
InventorsHajime Komatsu, Susumu Ohkawachi, Fujitsugu Suzuki
Life of this patent
Estimating the term…
Abstract
A direct positive silver halide photographic light sensitive material including a support having thereon at least one silver halide emulsion layer containing internal latent image silver halide grains, each of the grains comprising a core/shell structured particle comprising a core, at least one intermediate layer, and an outermost layer formed thereon. The outermost layer consists essentially of silver chloride which accounts for no more than 10 mol % of the silver halide in the internal latent image silver halide grain. Such photographic materials display an increased sensitivity while maintaining an adequate image density.
Claims12
A direct positive silver halide photographic light-sensitive material comprising a support having thereon at least one silver halide emulsion layer containing internal latent image silver halide grains, each of said grains comprising a core/shell structured particle comprising a core, at least one intermediate layer and an outermost layer formed thereon, said outermost layer consisting essentially of silver chloride accounting for not more than 10 mole percent of the silver halide of said internal latent image silver halide grain.
A method for producing internal image type photographic silver halide grains, said method comprising forming a silver halide outermost layer on core/shell structured silver halide particles wherein said layer consists essentially of silver chloride which accounts for not more than 10 mole percent of the total mole percent of the silver halide of said internal latent image type photographic silver halide grains.
A method of forming a direct positive image which comprises
- imagewise exposing a silver halide photographic light-sensitive material, and
- subjecting said exposed silver halide photographic light-sensitive material to surface development after or during fogging treatment,
- said silver halide photographic light-sensitive material comprising a support having thereon at least one silver halide emulsion layer containing internal latent image silver halide grains, each of said grains comprising a core/shell structured particle comprising a core, at least one intermediate layer, and an outermost layer formed thereon, said outermost layer consisting essentially of silver chloride which accounts for no more than 10 mole percent of the total mole amount of silver halide of said internal latent image silver halide grains.
Dependencies are inferred from the claim text.