US4554245A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color reversal light-sensitive materials
Assignee: Fujifilm Holdings Corp
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Filing: 1984-01-30
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Granted: 1985-11-19
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Expires: 2004-01-30
Abstract
Abstract A color reversal photographic light-sensitive material is disclosed. The material is comprised of a support base having thereon a silver halide emulsion layer, an organic compound and colloid grains of a metal or metal sulfide or silver halide grains the surface of which is previously fogged. The silver halide emulsion layer includes fine grains of silver halide particles having a particle size of 0.3μ or less. The fine grain particles are present in the emulsion in an amount in the range of about 30% to about 95% based on the total number of silver halide grains in the emulsion. The silver halide emulsion also includes coarse grains having a particle size of more than 0.3μ. The organic compound has a solubility product constant of 10 -14 or less when forming a salt with a silver ion. By utilizing the organic compound in combination with the particular fine grain silver halide particles it is possible to obtain a material which has improved tone reproduction properties in high exposure areas and also provide a material with a wide exposure lattitude.
Inventors
- 👤 Yasuhiro Hayashi
- 👤 Naoyasu Deguchi
- 👤 Hiroyuki Yamagami
- 👤 Kensuke Goda
- 👤 Kazunori Hasebe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:51
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/3022
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
184 words
A color reversal photographic light-sensitive material, comprising: a support base having thereon: a silver halide emulsion layer comprised of a mixture of fine grain silver halide latent image forming particles having a particle size of 0.3μ or less, the fine grain particles being present in the emulsion in an amount in the range of about 30% to about 95% based on the total number of silver grains in the emulsion layer, and coarse grain silver halide latent image forming particles having a particle size of more than 0.3μ; an organic compound present in the emulsion layer, the compound being an additive for improving tone reproduction and having a solubility product constant of 10 -14 or less when forming a salt with a silver ion; and colloid grains of an ingredient selected from the group consisting of metal, a metal sulfide and silver halide grains the surface of which is previously fogged, the colloid grains being present in a layer selected from the group consisting of the silver halide emulsion layer and a hydrophilic colloid layer, wherein said organic compound is a heterocyclic mercapto compound.
Claim 2
Dependent Claim
184 words
A color reversal photographic light-sensitive material, comprising: a support base having thereon: a silver halide emulsion layer comprised of a mixture of fine grain silver halide latent image forming particles having a particle size of 0.3μ or less, the fine grain particles being present in the emulsion in an amount in the range of about 30% to about 95% based on the total number of silver grains in the emulsion layer, and coarse grain silver halide latent image forming particles having a particle size of more than 0.3μ; an organic compound present in the emulsion layer, the compound being an additive for improving tone reproduction and having a solubility product constant of 10 -14 or less when forming a salt with a silver ion; and colloid grains of an ingredient selected from the group consisting of metal, a metal sulfide and silver halide grains the surface of which is previously fogged, the colloid grains being present in a layer selected from the group consisting of the silver halide emulsion layer and a hydrophilic colloid layer, wherein said organic compound is a heterocyclic mercapto compound.
Claim 3
Dependent Claim
54 words
A color reversal photographic light-sensitive material as claimed in claim 1, further comprising a second silver halide emulsion layer having the same color sensitivity property as the silver halide emulsion layer, the second silver halide emulsion layer having a higher sensitivity than the emulsion layer and being superposed in combination with the emulsion layer.
Claim 4
Dependent Claim
33 words
A color reversal photographic light-sensitive material as claimed in claim 1, wherein the organic compound has a solubility product constant of 10 -15 or less when forming a salt with a silver ion.
Claim 5
Dependent Claim
19 words
A color reversal photographic light-sensitive material as claimed in claim 1, wherein the organic compound is a 5-mercapto-1,3,4-thiadiazole derivative.
Claim 6
Dependent Claim
46 words
A color reversal photographic light-sensitive material as claimed in claim 1, wherein the fine grain silver halide is present in the silver halide emulsion layer in an amount of about 40% to about 90% of the total number of silver halide grains in the emulsion layer.
Claim 7
Dependent Claim
39 words
A color reversal photographic light-sensitive material as claimed in claim 1, wherein 90% or more of the number of grains having a particle size of 0.3μ or less have a particle size in the range of 0.3μ to 0.15μ.
Claim 8
Dependent Claim
46 words
A color reversal photographic light-sensitive material as claimed in claim 1, wherein 90% or more of the total number of grains of the fine grain silver halide have an average particle size within ±40% of the average particle size of the fine grain silver halide emulsion.
Claim 9
Dependent Claim
43 words
A color reversal photographic light-sensitive material as claimed in claim 7, wherein 90% or more of the fine grain silver halide particles have a particle size in the range of ±30% of the average particle size of the fine grain silver halide emulsion.
Claim 10
Dependent Claim
26 words
A color reversal photographic light-sensitive material as claimed in claim 1, wherein the fine grain silver halide particles have a particle size of 0.25μ or less.
Claim 11
Dependent Claim
29 words
A color reversal photographic light-sensitive material as claimed in claim 1, wherein the coarse grain silver halide particles have a particle size in the range of 0.35μ to 0.7μ.
Claim 12
Dependent Claim
37 words
A color reversal photographic light-sensitive material as claimed in claim 1, wherein the organic compound is present in an amount in the range of 10 -6 mg to 1 mg per 1 dm 2 of support base.
Claim 13
Dependent Claim
39 words
A color reversal photographic light-sensitive material as claimed in claim 11, wherein the organic compound is present in an amount in the range of 10 -4 mg to 10 -2 mg per 1 dm 2 of the support base.
Claim 14
Dependent Claim
28 words
A color reversal photographic light-sensitive material according to claim 1, wherein the organic compound is a 2-mercaptobenzimidazole compound, a 2-mercaptobenzothiazole compound, a 2-mercaptobenzoxazole compound or a 5-mercaptothiadiazole compound.
Claim 15
Dependent Claim
41 words
A color reversal photographic light-sensitive material according to claim 1, wherein the organic compound is a compound represented by general formula ##STR5## wherein R represents an alkyl group or an aralkyl group and n represents an integer of 2 to 10.
Claim 16
Dependent Claim
34 words
A color reversal photographic light-sensitive material according to claim 14, wherein the alkyl group has 1 to 4 carbon atoms and the alkyl moiety of the aralkyl group has 1 to 4 carbon atoms.
Claim 17
Dependent Claim
30 words
A color reversal photographic light-sensitive material according to claim 1, wherein the organic compound is a compound represented by one of formulae (1), (2), (3), (4), (5) or (6) ##STR6##
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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) | 1988-11-18 | 1989-05-20 | 1989-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-11-18 | 1993-05-20 | 1993-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-11-18 | 1997-05-20 | 1997-11-19 | $7700.00 | Window Closed / Lapsed |