US4452882A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silver halide photographic materials and process of developing them
Assignee: Fujifilm Holdings Corp
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Filing: 1983-04-29
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Granted: 1984-06-05
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Expires: 2003-04-29
Abstract
Abstract A silver halide photographic light-sensitive material and a developing process used in connection with that material are disclosed. The material is comprised of a support having thereon a silver halide emulsion layer containing a silver halide emulsion in which at least 80 mole % of the whole silver halide is composed of silver chloride, the mean grain size thereof is less than 0.4 μm, and which contains more than 1×10 -6 mole of a water-soluble rhodium salt per mole of silver at an optional period before finishing the first ripening in the production step for the silver halide emulsion. The material also contains 1×10 -5 to 1×10 -2 mole of polyalkylene oxide having a molecular weight of at least 600 or a derivative thereof per mole of silver. The process involves imagewise exposing the material and processing it in a developer containing 0.05 to 0.5 mole/liter of a dihydroxybenzene series developing agent, 0 to 0.05 g/liter of an auxiliary developing agent, at least 0.25 mole/liter of a free sulfite ion, at least 20 mg/liter of 5- or 6-nitroindazole, and an alkali of an amount sufficient for keeping the pH of the developer higher than 10.5. The material and processing are capable of providing good letter image quality in a short developing time.
Inventors
- 👤 Yoshitaka Akimura
- 👤 Eiichi Okutsu
- 👤 Shigenori Moriuchi
- 👤 Naomi Saeki
- 👤 Taiji Hashimura
- 👤 Hiroyuki Mifune
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:35
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/04; G03C1/043; Y; Y10; Y10S; Y10S430/00; Y10S430/15
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
115 words
A silver halide photographic light-sensitive material comprising a support having thereon a silver halide emulsion layer containing a silver halide emulsion in which at least 80 mole% of the whole silver halide is composed of silver chloride, the mean grain size thereof is less than 0.4 μm, and which contains more than 1×10 -6 mole of a water-soluble rhodium salt per mole of silver at an optional period before finishing the first ripening in the production step for the silver halide emulsion, said silver halide photographic light-sensitive material further containing 1×10 -5 to 1×10 -2 mole of polyalkylene oxide having a molecular weight of at least 600 or a derivative thereof per mole of silver.
Claim 2
Dependent Claim
115 words
A silver halide photographic light-sensitive material comprising a support having thereon a silver halide emulsion layer containing a silver halide emulsion in which at least 80 mole% of the whole silver halide is composed of silver chloride, the mean grain size thereof is less than 0.4 μm, and which contains more than 1×10 -6 mole of a water-soluble rhodium salt per mole of silver at an optional period before finishing the first ripening in the production step for the silver halide emulsion, said silver halide photographic light-sensitive material further containing 1×10 -5 to 1×10 -2 mole of polyalkylene oxide having a molecular weight of at least 600 or a derivative thereof per mole of silver.
Claim 3
Dependent Claim
23 words
A silver halide photographic light-sensitive material as claimed in claim 1, wherein the polyalkylene oxide is present within the silver halide emulsion layer.
Claim 4
Dependent Claim
22 words
A silver halide photographic light-sensitive material as claimed in claim 1, further comprising a hydropholic colloid layer which contains the polyalkylene oxide.
Claim 5
Dependent Claim
29 words
A silver halide photographic light-sensitive material as claimed in claim 1, further comprising an additional compound selected from the group consisting of a benzotriazole compound and a mercapto compound.
Claim 6
Dependent Claim
191 words
A developing process, comprising the steps of: providing a silver halide photographic light-sensitive material comprised of a support having thereon a silver halide emulsion layer containing a silver halide emulsion in which at least 80 mole% of the whole silver halide is composed of silver chloride, the mean grain size thereof is less than 0.4 μm, and which contains more than 1×10 -6 mole of a water-soluble rhodium salt per mole of silver at an optional period before finishing the first ripening step in the production step of the silver halide emulsion, said silver halide photographic light-sensitive material further containing 1×10 -5 to 1×10 -2 mole of polyalkylene oxide having a molecular weight of at least 600 or a derivative thereof per mole of silver; imagewise exposing the photographic material: and processing the exposed material with a developer containing 0.05 to 0.5 mole/liter of a dihydroxybenzene series developing agent, 0 to 0.05 g/liter of an auxiliary developing agent, at least 0.25 mole/liter of a free sulfite ion, at least 20 mg/liter of 5- or 6-nitroindazole, and an alkali of an amounts sufficient for keeping the pH of the developer above 10.5.
Claim 7
Dependent Claim
191 words
A developing process, comprising the steps of: providing a silver halide photographic light-sensitive material comprised of a support having thereon a silver halide emulsion layer containing a silver halide emulsion in which at least 80 mole% of the whole silver halide is composed of silver chloride, the mean grain size thereof is less than 0.4 μm, and which contains more than 1×10 -6 mole of a water-soluble rhodium salt per mole of silver at an optional period before finishing the first ripening step in the production step of the silver halide emulsion, said silver halide photographic light-sensitive material further containing 1×10 -5 to 1×10 -2 mole of polyalkylene oxide having a molecular weight of at least 600 or a derivative thereof per mole of silver; imagewise exposing the photographic material: and processing the exposed material with a developer containing 0.05 to 0.5 mole/liter of a dihydroxybenzene series developing agent, 0 to 0.05 g/liter of an auxiliary developing agent, at least 0.25 mole/liter of a free sulfite ion, at least 20 mg/liter of 5- or 6-nitroindazole, and an alkali of an amounts sufficient for keeping the pH of the developer above 10.5.
Claim 8
Dependent Claim
27 words
A developing process as claimed in claim 5, wherein the dihydroxybenzene series developing agent is present in an amount within the range of 0.1 to 0.4 mole/liter.
Claim 9
Dependent Claim
27 words
A developing process as claimed in claim 5, wherein the pH of the developer is adjusted to a level ranging from higher than 10.5 up to 12.5.
Claim 10
Dependent Claim
27 words
A developing process as claimed in claim 7, wherein the pH of the developer is adjusted to a level ranging from higher than 11.5 up to 12.5.
Claim 11
Dependent Claim
20 words
A developing process as claimed in claim 5, wherein the developer contains solely a dihydroxybenzene containing no auxiliary developing agent.
Claim 12
Dependent Claim
13 words
A developing process as claimed in claim 9, wherein the dihydroxybenzene is hydroquinone.
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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) | 1987-06-05 | 1987-12-05 | 1988-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-06-05 | 1991-12-05 | 1992-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-06-05 | 1995-12-05 | 1996-06-05 | $7700.00 | Window Closed / Lapsed |