US4623612A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of developing silver halide photographic light-sensitive materials
Assignee: Fujifilm Holdings Corp
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Filing: 1985-10-21
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Granted: 1986-11-18
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Expires: 2005-10-21
Abstract
Abstract 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 ANGSTROM 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.
Inventors
- 👤 Toshihiro Nishikawa
- 👤 Hatsumi Tanemura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:52
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/035; G03C5/00; G03C5/26; G03C5/50; G03C2001/03535
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
121 words
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 Å 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; a reversal processing; and a second development comprising color development processing.
Claim 2
Dependent Claim
121 words
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 Å 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; a reversal processing; and a second development comprising color development processing.
Claim 3
Dependent Claim
52 words
A method of developing silver halide photographic light-sensitive materials as claimed in claim 1, wherein the solvent for silver halide is a compound having a chemical species selected from the group consisting of SCN - , SO 3 2- , S 2 O 5 2- and S 2 O 3 2- .
Claim 4
Dependent Claim
69 words
A method of developing silver halide photographic light-sensitive materials as claimed in claim 2, wherein the solvent for silver halide is a compound selected from the group consisting of KSCN, NaSCN, K 2 SO 3 , Na 2 SO 3 , K 2 S 2 O 5 , Na 2 S 2 O 5 , K 2 S 2 O 3 and Na 2 S 2 O 3 .
Claim 5
Dependent Claim
48 words
A method of developing silver halide photographic light-sensitive materials as claimed in claim 1, wherein the developing solution contains a compound having a chemical species of SCN - as a solvent for silver halide in an amount of 0.005 to 0.02 mol per liter of the developing solution.
Claim 6
Dependent Claim
49 words
A method of developing silver halide photographic light-sensitive materials as claimed in claim 1, wherein the developing solution contains a compound having a chemical species of SO 3 2- as a solvent for silver halide in an amount of 0.05 to 1 mol per liter of the developing solution.
Claim 7
Dependent Claim
51 words
A method of developing silver halide photographic light-sensitive materials as claimed in claim 1, wherein the developing solution contains a compound having a chemical species of S 2 O 5 2- as a solvent for silver halide in an amount of 0.025 to 0.5 mol per liter of the developing solution.
Claim 8
Dependent Claim
51 words
A method of developing silver halide photographic light-sensitive materials as claimed in claim 1, wherein the developing solution contains a compound having a chemical species of S 2 O 3 2- as a solvent for silver halide in an amount of 0.005 to 0.02 mol per liter of the developing solution.
Claim 9
Dependent Claim
36 words
A method of developing silver halide photographic light-sensitive materials as claimed in claim 1, wherein the surface of the core is subjected to chemical sensitization using a sulfur sensitization process or a noble metal sensitization process.
Claim 10
Dependent Claim
49 words
A method of developing silver halide photographic light-sensitive materials as claimed in claim 5, wherein the developing solution contains a compound having a chemical species of SO 3 2- as a solvent for silver halide in an amount of 0.1 to 0.5 mol per liter of the developing solution.
Claim 11
Dependent Claim
51 words
A method of developing silver halide photographic light-sensitive materials as claimed in claim 6, wherein the developing solution contains a compound having a chemical species of S 2 O 5 2- as a solvent for silver halide in an amount of 0.05 to 0.25 mol per liter of the developing solution.
Claim 12
Dependent Claim
51 words
A method of developing silver halide photographic light-sensitive materials as claimed in claim 7, wherein the developing solution contains a compound having a chemical species of S 2 O 3 2- as a solvent for silver halide in an amount of 0.01 to 0.015 mol per liter of the developing solution.
Claim 13
Dependent Claim
34 words
A method of developing silver halide photographic light-sensitive materials as claimed in claim 1, wherein the particle sizes of the core/shell type silver halide grains are in a range of 0.1 to 5 μm.
Claim 14
Dependent Claim
34 words
A method of developing silver halide photographic light-sensitive materials as claimed in claim 12, wherein the particle sizes of the core/shell type silver halide grains are in a range of 0.1 to 3 μm.
Claim 15
Dependent Claim
29 words
A method of developing silver halide photographic light-sensitive materials as claimed in claim 1, wherein a processing temperature is selected from the range of 18° C. to 50° C.
Claim 16
Dependent Claim
38 words
A method of developing silver halide photographic light-sensitive materials as claimed in claim 1, wherein the core comprises silver iodobromide containing 0-10 mol % silver iodide and the shell comprises silver iodobromide containing 0-10 mol % silver iodide.
Claim 17
Dependent Claim
38 words
A method of developing silver halide photographic light-sensitive materials as claimed in claim 1, wherein the core comprises silver iodobromide containing 0-5 mol % silver iodide and the shell comprises silver iodobromide containing 0-5 mol % silver iodide.
Claim 18
Dependent Claim
23 words
A method of developing silver halide photographic light-sensitive materials as claimed in claim 1, wherein the silver halide grains have a two-layer structure.
Claim 19
Dependent Claim
48 words
A method of developing silver halide photographic light-sensitive materials as claimed in claim 1, wherein the developing solution contains a compound having a chemical species of SCN - as a solvent for silver halide in an amount of 0.01 to 0.015 mol per liter of the developing solution.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-11-17 | 1990-05-19 | 1990-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-11-17 | 1994-05-19 | 1994-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-11-17 | 1998-05-19 | 1998-11-18 | $7700.00 | Window Closed / Lapsed |