Back to results
US 4,623,612 AGranted
Method of developing silver halide photographic light-sensitive materials
AssigneeFuji Photo Film Co., Ltd.
InventorsToshihiro Nishikawa, Hatsumi Tanemura
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeFuji Photo Film Co., Ltd.
InventorsToshihiro Nishikawa, Hatsumi Tanemura
Estimating the term…
An improved method of developing silver halide photographic light-sensitive materials comprising at least one silver halide emulsion layer on a support is disclosed. In the improvement, said silver halide emulsion layer contains core/shell type silver halide grains having a shell thickness of 25 to 150 .ANG. wherein the surface of the core is subjected to chemical sensitization treatment and the surface of the shell is not subjected to chemical sensitization, and a developing solution contains a solvent for silver halide. It is possible to carry out spectral sensitization without causing a reduction in intrinsic sensitivity and to provide high-speed silver halide light-sensitive materials which are excellent in anti-fading property of latent images and excellent in stabilization with the passage of time using the above-described improved method.
In a method of developing on imagewise exposed silver halide photographic light-sensitive materials comprising at least one spectrally sensitized silver halide emulsion layer on a support, the improvement wherein said spectrally sensitized silver halide emulsion layer contains core-shell type silver halide grains having a shell thickness of 25 to 150 .ANG. wherein the core is not fogged, the surface of the core is subjected to chemical sensitization and the sufface of the shell is not subjected to chemical sensitization, wherein the developing solution used contains a sulfur containing solvent for silver halide, and wherein a positive image is formed sequentially by a first development comprising black and white photographic processing;
Dependencies are inferred from the claim text.