US4803149A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silver halide photographic materials
Assignee: Fujifilm Holdings Corp
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Filing: 1986-10-06
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Granted: 1989-02-07
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Expires: 2006-10-06
Abstract
Abstract A silver halide photographic material for a bright room and a process for producing the photographic material are disclosed, wherein the silver halide photographic material for a bright room comprises a support having thereon at least one silver halide emulsion layer containing silver chloride grains or silver chlorobromide grains containing at least 80 mol % silver chloride, at least one of said silver halide emulsion layer or another hydrophilic colloid layer(s) present containing a yellow dye making the silver halide photographic material substantially insensitive to visible light of 420 n.m. or more and an ultraviolet absorbent in an amount sufficient to reduce the specific sensitivity of the silver halide emulsion at 360 n.m. to 1/2 or lower than 1/2 thereof in the absence of the ultraviolet absorbent, and the γ value of the silver halide photographic material being at least 10.
Inventors
- 👤 Toshiro Takahashi
- 👤 Ken-ichi Kuwabara
- 👤 Masahiro Okada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:47
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/815; G03C1/825; Y; Y10; Y10S; Y10S430/00; Y10S430/15
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
120 words
A silver halide photographic material for a bright room comprising a support having thereon at least one silver halide emulsion layer containing silver chloride grains or silver chlorobromide grains containing at least 80 mol% silver chloride, at least one of said silver halide emulsion layer or another hydrophilic colloid layer(s) present containing a yellow dye making the silver halide photographic material substantially insensitive to visible light of 420 n.m. or more and an ultraviolet absorbent in an amount sufficient to reduce the specific sensitivity of the silver halide emulsion at 360 n.m. to 1/2 or lower than 1/2 thereof in the absence of the ultraviolet absorbent, and the γ value of the silver halide photographic material being at least 10.
Claim 2
Dependent Claim
120 words
A silver halide photographic material for a bright room comprising a support having thereon at least one silver halide emulsion layer containing silver chloride grains or silver chlorobromide grains containing at least 80 mol% silver chloride, at least one of said silver halide emulsion layer or another hydrophilic colloid layer(s) present containing a yellow dye making the silver halide photographic material substantially insensitive to visible light of 420 n.m. or more and an ultraviolet absorbent in an amount sufficient to reduce the specific sensitivity of the silver halide emulsion at 360 n.m. to 1/2 or lower than 1/2 thereof in the absence of the ultraviolet absorbent, and the γ value of the silver halide photographic material being at least 10.
Claim 3
Dependent Claim
46 words
The silver halide photographic material for a bright room as claimed in claim 1, wherein the silver chloride grains or silver chlorobromide grain in the silver halide emulsion layer contain a rhodium salt in an amount of 1×10 -7 to 1×10 -4 per mol of silver.
Claim 4
Dependent Claim
36 words
The silver halide photographic material for a bright room as claimed in claim 1, wherein the yellow dye is selected from the group consisting of oxonol dyes, hemioxonol dyes, merocyanine dyes, cyanine dyes and azo dyes.
Claim 5
Dependent Claim
51 words
The silver halide photographic material for a bright room as claimed in claim 1, wherein the ultraviolet absorbent is selected from the group consisting of aryl group-substituted benzotriazole compounds, 4-thiazolidone compounds, benzophenone compounds, cinnamic acid ester compounds, benzophenone compounds, cinnamic acid ester compounds, butadiene compounds, benzoxazole compound and ultraviolet absorptive polymers.
Claim 6
Dependent Claim
33 words
The silver halide photographic material for a bright room as claimed in claim 1, wherein the yellow dye is used in an amount of 10 -3 g/m 2 to 1 g/m 2 .
Claim 7
Dependent Claim
33 words
The silver halide photographic material for a bright room as claimed in claim 1, wherein the ultraviolet absorbent is used in an amount of 10 -3 g/m 2 to 1 g/m 2 .
Claim 8
Dependent Claim
31 words
The silver halide photographic material for a bright room as claimed in claim 1, wherein the silver halide emulsion layer, another hydrophilic colloid layer or both of them contain hydrazine derivatives.
Claim 9
Dependent Claim
144 words
The silver halide photographic material for a bright room as claimed in claim 7, wherein the hydrazine derivatives are selected from compounds represented by formula (III-1) or (III-2) ##STR6## wherein R 1 represents an aliphatic or aromatic group or unsaturated heterocyclic group; R 2 represents a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted alkoxy group, or a substituted or unsubstituted aryloxy group; and G represents a carbonyl group, a sulfonyl group, a sulfoxy group, a phosphoryl group, or an N-substituted or unsubstituted iminomethylene group; Acyl is an acyl group; Ar is an aryl group, and R 1' is a hydrogen atom or a sulfinic acid radical substituent and R 2' is a sulfinic acid radical substituent when R 1' is hydrogen atom and hydrogen atom when R 1' is a sulfinic acid radical.
Claim 10
Dependent Claim
31 words
The silver halide photographic material for a bright room as claimed in claim 1, wherein the silver halide emulsion layer, another hydrophilic colloid layer or both of them contain tetrazolium compounds.
Claim 11
Dependent Claim
165 words
The silver halide photographic material for a bright room as claimed in claim 9, wherein the tetrazolium compound is selected from the compounds represented by formulae (IV), (V) and (VI) ##STR7## wherein R 1 , R 3 , R 4 , R 5 , R 8 , R 9 , R 10 and R 11 each represents an allyl group, a pheny group, a naphthyl group or a heterocyclic group or a group forming a metal chelate or a complex; R 2 , R 6 and R 7 each represents an allyl group, a phenyl group, a naphthyl group, a heterocyclic group, an alkyl group, a hydroxy group, a carboxy group or a salt thereof, a carboxyalkyl group, a mercapto group, a nitro group or a hydrogen atom; D represents a divalent aromatic group; E represents an alkylene group, an arylene group, or an aralkylene group; and n represents 1 or 2, n being 1 when the compound of each formula forms an intermolecular salt.
Claim 12
Dependent Claim
174 words
A process for producing an image in a silver halide photographic material for a bright room, the γ value of the silver halide photographic material being at least 10, comprising developing a silver halide photographic material comprising a support having thereon at least one silver halide emulsion layer containing silver chloride grains or silver chlorobromide grains containing at least 80 mol% silver chloride, at least one of said silver halide emulsion layer(s) or another hydrophilic colloid layer(s) present containing a yellow dye making the silver halide photographic material substantially insensitive to visible light of 420 n.m. or more, an ultraviolet absorbent in an amount sufficient to reduce the specific sensitivity of the silver halide emulsion at 360 n.m. to 1/2 or lower than 1/2 thereof in the absence of the ultraviolet absorbent, with a developer of pH 10.5-12.3, at least one of said silver halide emulsion layer(s), said another hydrophilic colloid layer(s), or both said at least one silver halide emulsion layer(s) and said another hydrophilic colloid layer(s) containing one or more hydrazine compounds.
Claim 13
Dependent Claim
174 words
A process for producing an image in a silver halide photographic material for a bright room, the γ value of the silver halide photographic material being at least 10, comprising developing a silver halide photographic material comprising a support having thereon at least one silver halide emulsion layer containing silver chloride grains or silver chlorobromide grains containing at least 80 mol% silver chloride, at least one of said silver halide emulsion layer(s) or another hydrophilic colloid layer(s) present containing a yellow dye making the silver halide photographic material substantially insensitive to visible light of 420 n.m. or more, an ultraviolet absorbent in an amount sufficient to reduce the specific sensitivity of the silver halide emulsion at 360 n.m. to 1/2 or lower than 1/2 thereof in the absence of the ultraviolet absorbent, with a developer of pH 10.5-12.3, at least one of said silver halide emulsion layer(s), said another hydrophilic colloid layer(s), or both said at least one silver halide emulsion layer(s) and said another hydrophilic colloid layer(s) containing one or more hydrazine compounds.
Claim 14
Dependent Claim
176 words
A process for producing an image in a silver halide photographic material for a bright room, the γ value of the silver halide photographic material being at least 10, comprising developing a silver halide photographic material comprising a support having thereon at least one silver halide emulsion layer containing silver chloride grains or silver chlorobromide grains containing at least 80 mol% silver chloride, at least one of said silver halide emulsion layer(s) or another hydrophilic colloid layer(s) present containing a yellow dye making the silver halide photographic material substantially insensitive to visible light of 420 n.m. or more, an ultraviolet absorbent in an amount sufficient to reduce the specific sensitivity of the silver halide emulsion at 360 n.m. to 1/2 or lower than 1/2 thereof in the absence of the ultraviolet absorbent, with a developer of pH 9 to 12, at least one of said silver halide emulsion layer(s), said another hydrophilic colloid layer(s), or both said at least one silver halide emulsion layer(s) and said another hydrophilic colloid layer(s) containing one or more tetrazolium compounds.
Claim 15
Dependent Claim
176 words
A process for producing an image in a silver halide photographic material for a bright room, the γ value of the silver halide photographic material being at least 10, comprising developing a silver halide photographic material comprising a support having thereon at least one silver halide emulsion layer containing silver chloride grains or silver chlorobromide grains containing at least 80 mol% silver chloride, at least one of said silver halide emulsion layer(s) or another hydrophilic colloid layer(s) present containing a yellow dye making the silver halide photographic material substantially insensitive to visible light of 420 n.m. or more, an ultraviolet absorbent in an amount sufficient to reduce the specific sensitivity of the silver halide emulsion at 360 n.m. to 1/2 or lower than 1/2 thereof in the absence of the ultraviolet absorbent, with a developer of pH 9 to 12, at least one of said silver halide emulsion layer(s), said another hydrophilic colloid layer(s), or both said at least one silver halide emulsion layer(s) and said another hydrophilic colloid layer(s) containing one or more tetrazolium compounds.
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) | 1992-02-07 | 1992-08-08 | 1993-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-02-07 | 1996-08-08 | 1997-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-02-07 | 2000-08-08 | 2001-02-07 | $7700.00 | Window Closed / Lapsed |