US5498511A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silver halide photographic material
Assignee: Fujifilm Holdings Corp
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Filing: 1994-10-21
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Granted: 1996-03-12
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Expires: 2014-10-21
Abstract
Abstract A silver halide photographic material is disclosed, which comprises a support having thereon at least one silver halide emulsion layer, wherein the swelling amount of the hydrophilic colloid layers including the light-sensitive silver halide emulsion layer and a protective layer coated on at least one side of the support is not more than 10 μm in thickness and at least 60% of the total projected area of the total silver halide grains in at least one silver halide emulsion layer includes tabular silver halide grains having a Cl - content of at least 20 mole %, a {100} plane as the major plane, a thickness of 0.35 μm or less, and an aspect ratio (diameter/thickness) of at least 2, and further a developing process for developing the above silver halide photographic material with a developer containing ascorbic acid or the derivative thereof is disclosed.
Inventors
- 👤 Seiji Yamashita
- 👤 Mitsuo Saitou
- 👤 Tomoyuki Ozeki
- 👤 Tatsuya Ishizaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:21
CPC Classifications
G; G03; G03C; G03C5/00; G03C5/26; G03C5/29; G03C5/30; G03C1/00; G03C1/005; G03C1/0051
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
183 words
A silver halide photographic material comprising a support having thereon at least one silver halide emulsion layer, wherein the swelling amount of the hydrophilic colloid layers including the light-sensitive silver halide emulsion layer and a protective layer coated on at least one side of the support is not more than 10 μm in thickness, wherein at least 60% of the total projected area of the total silver halide grains in at least one silver halide emulsion layer includes tabular silver halide grains having a Cl - content of at least 20 mole %, a {100} plane as the major plane, a thickness of 0.35 μm or less, an aspect ratio (diameter/thickness) of at least 2, and a sum total of projected areas of twin silver halide grains is not more than 10% of the total projected area of the tabular silver halide grains, and wherein the tabular silver halide grains in the silver halide emulsion have a layer containing at least one silver salt comprising at least one of silverhalobromide and silver haloiodide and at least one of silver thiocyanate and silver selenocyanate.
Claim 2
Dependent Claim
183 words
A silver halide photographic material comprising a support having thereon at least one silver halide emulsion layer, wherein the swelling amount of the hydrophilic colloid layers including the light-sensitive silver halide emulsion layer and a protective layer coated on at least one side of the support is not more than 10 μm in thickness, wherein at least 60% of the total projected area of the total silver halide grains in at least one silver halide emulsion layer includes tabular silver halide grains having a Cl - content of at least 20 mole %, a {100} plane as the major plane, a thickness of 0.35 μm or less, an aspect ratio (diameter/thickness) of at least 2, and a sum total of projected areas of twin silver halide grains is not more than 10% of the total projected area of the tabular silver halide grains, and wherein the tabular silver halide grains in the silver halide emulsion have a layer containing at least one silver salt comprising at least one of silverhalobromide and silver haloiodide and at least one of silver thiocyanate and silver selenocyanate.
Claim 3
Dependent Claim
32 words
The silver halide photographic material as claimed in claim 1, wherein in the silver halide emulsion, the tabular silver halide grains are chemically sensitized with a selenium compound and/or a tellurium compound.
Claim 4
Dependent Claim
50 words
The silver halide photographic material as claimed in claim 1, wherein in the silver halide emulsion, the silver salt in the layer in the tabular silver halide grains has a solubility lower than that of silver chloride on the surface and/or in the inside (excluding the nucleus) of the grains.
Claim 5
Dependent Claim
24 words
The silver halide photographic material as claimed in claim 1, wherein the dry thickness of the hydrophilic colloid layers is at least 3.3 μm.
Claim 6
Dependent Claim
116 words
The silver halide photographic material as claimed in claim 1, wherein the support has at least one silver halide emulsion layer on both sides thereof, the swelling amount of the hydrophilic colloid layers including the silver halide emulsion layer is not more than 8.0 μm in thickness in each side, and at least one silver halide emulsion layer contains tabular silver halide grains which have a Cl - content of at least 20 mole %, have a {100} plane as the major plane, have a thickness of 0.35 μm or less, have an aspect ratio of at least 2, and account for at least 60% of the total projected area of the total silver halide grains.
Claim 7
Dependent Claim
24 words
The silver halide photographic material as claimed in claim 5, wherein the dry thickness of the hydrophilic colloid layers is at least 2.5 μm.
Claim 8
Dependent Claim
59 words
The silver halide photographic material as claimed in claim 1, wherein in the silver halide emulsion, the coefficient of variation of the diameter distribution in the tabular silver halide grains is from 0 to 0.11, when the tabular silver halide grains are collected in the order of the larger projected area up to 70% of the total projected area.
Claim 9
Dependent Claim
52 words
The silver halide photographic material as claimed in claim 1, wherein in the silver halide emulsion, at least 47% of the total projected area of the tabular silver halide grains have an edge ratio (the edge length of the long edge/the edge length of the short edge) of from 1 to 1.4.
Claim 10
Dependent Claim
46 words
The silver halide photographic material as claimed in claim 1, wherein in the silver halide emulsion, at least 10% of the total projected area of the tabular silver halide grains comprise grains in which one of the 4 corners of the grain is rounded in form.
Claim 11
Dependent Claim
205 words
A developing process which comprises developing a silver halide photographic material with a developer containing ascorbic acid or the derivative thereof, said silver halide photographic material comprising a support having formed thereon at least one silver halide emulsion layer, wherein the swelling amount of the hydrophilic colloid layers including the light-sensitive silver halide emulsion layer and a protective layer coated on at least one side of the support is not more than 10 μm in thickness, wherein at least 60% of the total projected area of the total silver halide grains in at least one silver halide emulsion layer includes tabular silver halide grains having a Cl - content of at least 20 mole %, a {100} plane as the major plane, a thickness of 0.35 μm or less, an aspect ratio (diameter/thickness) of at least 2, and a sum total of projected areas of twin silver halide grains is not more than 10% of the total projected area of the tabular silverhalide grains, and wherein the tabular silver halide grains in the silver halide emulsion have a layer containing at least one silver salt comprising at least one of silver halobromide and silver haloiodide and at least one of silver thiocyanate and silver selenocyanate.
Claim 12
Dependent Claim
205 words
A developing process which comprises developing a silver halide photographic material with a developer containing ascorbic acid or the derivative thereof, said silver halide photographic material comprising a support having formed thereon at least one silver halide emulsion layer, wherein the swelling amount of the hydrophilic colloid layers including the light-sensitive silver halide emulsion layer and a protective layer coated on at least one side of the support is not more than 10 μm in thickness, wherein at least 60% of the total projected area of the total silver halide grains in at least one silver halide emulsion layer includes tabular silver halide grains having a Cl - content of at least 20 mole %, a {100} plane as the major plane, a thickness of 0.35 μm or less, an aspect ratio (diameter/thickness) of at least 2, and a sum total of projected areas of twin silver halide grains is not more than 10% of the total projected area of the tabular silverhalide grains, and wherein the tabular silver halide grains in the silver halide emulsion have a layer containing at least one silver salt comprising at least one of silver halobromide and silver haloiodide and at least one of silver thiocyanate and silver selenocyanate.
Claim 13
Dependent Claim
26 words
A developing process as claimed in claim 10, wherein the developer containing ascorbic acid or the derivative thereof contains at least 0.3 mole/liter of a carbonate.
Claim 14
Dependent Claim
23 words
A developing process as claimed in claim 10, wherein the replenishing amount for the developer is not more than 300 ml/m 2 .
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-03-12 | 1999-09-11 | 2000-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-03-12 | 2003-09-11 | 2004-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-03-12 | 2007-09-11 | 2008-03-12 | $7700.00 | Window Closed / Lapsed |