EP0196626A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Silver halide photographic material and method for forming an ultrahigh contrast negative image therewith
Assignee: Fujifilm Holdings Corp
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Filing: 1986-03-26
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Granted: —
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Expires: 2006-03-26
Abstract
Abstract @ A silver halide photographic material is described, comprising a support, at least one silver halide emulsion layer, and one or more light-insensitive hydrophilic colloid layers, wherein said silver halide emulsion layer or said light-insensitive hydrophilic colloid layer contains a hydrazine derivative, and the photographic material has a film surface pH not higher than 5.8 on the side of said emulsion layer inclusive of said light-insensitive hydrophilic colloid layer; in another aspect, this invention is directed to a method for forming an ultrahigh contrast negative image, comprising exposing said photographic material imagewise, followed by development processing of the same with a developer containing at least 0.15 mil/liter of sulfite ion and having a pH of from 10.5 to 12.3.
Inventors
- 👤 Nobuaki Inoue
- 👤 Senzo Sasaoka
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-31 07:11
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/061; Y; Y10; Y10S; Y10S430/00; Y10S430/15
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
67 words
A silver halide negative photographic material comprising a support, at least one silver halide emulsion layer, and one or more light-insensitive hydrophilic colloid layers, wherein said silver halide emulsion layer or said light-insensitive hydrophilic colloid layer contains a hydrazine derivative, and the photographic material has a film surface pH not higher than 5.8 on the side of said emulsion layer inclusive of said light-insensitive hydrophilic colloid layer.
Claim 2
Dependent Claim
67 words
A silver halide negative photographic material comprising a support, at least one silver halide emulsion layer, and one or more light-insensitive hydrophilic colloid layers, wherein said silver halide emulsion layer or said light-insensitive hydrophilic colloid layer contains a hydrazine derivative, and the photographic material has a film surface pH not higher than 5.8 on the side of said emulsion layer inclusive of said light-insensitive hydrophilic colloid layer.
Claim 3
Dependent Claim
30 words
A silver halide negative photographic material as in Claim 1, wherein the hydrazine derivative is represented by formula (I) wherein R 1 represents an aliphatic group or an aromatic group.
Claim 4
Dependent Claim
32 words
A silver halide negative photographic material as in Claim 2, wherein R 1 in formula (I) represents a straight chain, branched or cyclic alkyl group containing from 1 to 20 carbon atoms.
Claim 5
Dependent Claim
37 words
A silver halide negative photographic material as in Claim 2, wherein the alkyl group represented by R 1 is substituted with an aryl group, an alkoxyl group, a sulfoxy group, a sulfonamido group or a carbonamido group.
Claim 6
Dependent Claim
32 words
A silver halide negative photographic material as in Claim 2, wherein the aromatic group represented by R 1 is a monocyclic aryl group, a bicyclic aryl group or an unsaturated heterocyclic group.
Claim 7
Dependent Claim
32 words
A silver halide negative photographic material as in Claim 1, wherein the hydrazine derivative is contained in an amount of from 1×10 -6 to 1×10 -1 mol per mol of silver halide.
Claim 8
Dependent Claim
31 words
A silver halide negative photographic material as in Claim 1, wherein the hydrazine derivative is contained in an amount of from 1x10-5 to 4×10 -2 mol per mol of silver halide.
Claim 9
Dependent Claim
22 words
A silver halide negative photographic material as in Claim 1, wherein the hydrazine derivative is incorporated in the silver halide emulsion layer.
Claim 10
Dependent Claim
24 words
A silver halide negative photographic material as in Claim 1, wherein the photographic material has a film surface pH of from 4.0 to 5.6.
Claim 11
Dependent Claim
24 words
A silver halide negative photographic material as in claim 8, wherein the photographic material has a film surface pH of from 4.0 to 5.6.
Claim 12
Dependent Claim
72 words
A silver halide negative photographic material as in Claim 1, wherein the silver halide of the silver halide emulsion layer is prepared in the presence of from 10 -8 to 10 -5 mol of an iridium salt.or an iridium complex salt per mol of silver and is a silver haloiodide whose silver iodide content in the surface layer of the grain is larger than the mean silver iodide content of the grain.
Claim 13
Independent Claim
111 words
A method for forming an ultrahigh contrast negative image employing a negative silver halide photographic material comprising a support, at least one silver halide emulsion layer, and one or more light-insensitive hydrophilic colloid layers, wherein said silver halide emulsion layer or said light-insensitive hydrophilic colloid layer contains a hydrazine derivative, and the film surface pH of said photographic material on the side of said emulsion layer inclusive of said light-insensitive hydrophilic colloid layer is not higher than 5.8, said method comprising imagewise exposure, followed by development processing of the photographic material with a developer containing at least 0.15 mol/liter of sulfite ion and having a pH of from 10.5 to 12.3.
Claim 14
Independent Claim
111 words
A method for forming an ultrahigh contrast negative image employing a negative silver halide photographic material comprising a support, at least one silver halide emulsion layer, and one or more light-insensitive hydrophilic colloid layers, wherein said silver halide emulsion layer or said light-insensitive hydrophilic colloid layer contains a hydrazine derivative, and the film surface pH of said photographic material on the side of said emulsion layer inclusive of said light-insensitive hydrophilic colloid layer is not higher than 5.8, said method comprising imagewise exposure, followed by development processing of the photographic material with a developer containing at least 0.15 mol/liter of sulfite ion and having a pH of from 10.5 to 12.3.
Claim 15
Dependent Claim
35 words
A method for forming an ultrahigh contrast negative image as in claim 12, wherein the hydrazine derivative is contained in an amount of from 1×10 -6 to 1×10 -1 mol per mol of silver halide.
Claim 16
Dependent Claim
35 words
A method for forming an ultrahigh contrast negative image as in Claim 12, wherein the hydrazine derivative is contained in an amount of from 1×10 -5 to 4×10 -2 mol per mol of silver halide.
Claim 17
Dependent Claim
25 words
A method for forming an ultrahigh contrast negative image as in Claim 12, wherein the hydrazine derivative is incorporated in the silver halide emulsion layer.
Claim 18
Dependent Claim
27 words
A method for forming an ultrahigh contrast negative image as in Claim 12, wherein the photographic material has a film surface pH of from 4.0 to 5.6.
Claim 19
Dependent Claim
76 words
A method for forming an ultrahigh contrast negative image as in Claim 12, wherein the silver halide of the silver halide emulsion layer is prepared in the presence of from 10 -8 to 10 -5 mol of an iridium salt or an iridium complex salt per mol of silver and is a silver haloiodide whose silver iodide content in the surface layer of the grain is larger than the mean silver iodide content of the grain.
Claim 20
Dependent Claim
24 words
A method for forming an ultrahigh contrast negative image as in Claim 12, wherein the developer has a pH of from 11,0 to 12.3.
References Cited (Backward Citations)
No citation records indexed.
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