Patent EP0282302A2 successfully refreshed from Google Patents.
EP0282302A2
Expired / Lapsed
EP
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High-speed processing of silver halide photographic light- sensitive materials
Assignee: Konica Minolta Inc
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Filing: 1988-03-10
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Granted: —
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Expires: 2008-03-10
Abstract
Abstract A silver halide photographic material which is capable of super-rapid processing with the total time of 20 to 60 minutes while processing high sensitivity, low fog and excellent pressure resistance and lack of graininess is described. The photographic material comprises a support bearing a hydrophilic colloidal layer including at least one light sensitive silver halide emulsion layer thereon, wherein at least some of the silver halide grains present in the said silver halide emulsion layer are tabular grains which have an aspect ratio of the grain size to the grain thickness of at least 5, such that the projective areas of said tabular grains represent not less than 50% of the projective areas of all the silver halide grains in said emulsion layer, the melting time taken for at least one silver halide emulsion layer of a 1 cm x 2 cm position of said silver halide photographic light-sensitive material in a 1.5% by weight aqueous solution of sodium hydroxide at 50°C to commence to dissolve is at least 45 minutes, and on the side bearing the hydrophilic colloidal layer containing said silver halide emulsion layer, gelatin is present in an amount from 2.00 to 3.20 g/m².
Inventors
- 👤 Akio Suzuki
- 👤 Satoru Nagasaki
- 👤 Nobuaki Tsuki
- 👤 Eiji Yoshida
- 👤 Masumi Arai
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 02:05
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; Y; Y10; Y10S; Y10S430/00; Y10S430/167; Y10S430/168
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
163 words
A silver halide photographic light-sensitive material comprising a support bearing a hydrophilic colloidal layer including at least one light sensitive silver halide emulsion layer thereon, wherein at least some of the silver halide grains present in the said silver halide emulsion layer are tabular grains which have an aspect ratio of the grain size to the grain thickness of at least 5, such that the projective areas of said tabular grains represent not less than 50% of the projective areas of all the silver halide grains in said emulsion layer, the time taken for at least one silver halide emulsion layer of a 1 cm x 2 cm portion of said silver halide photographic light-sensitive material in a 1.5% by weight aqueous solution of sodium hydroxide at 50°C to commence to dissolve is at least 45 minutes, and on the side bearing the hydrophilic colloidal layer containing said silver halide emulsion layer, gelatin is present in an amount from 2.00 to 3.20 g/m².
Claim 2
Dependent Claim
163 words
A silver halide photographic light-sensitive material comprising a support bearing a hydrophilic colloidal layer including at least one light sensitive silver halide emulsion layer thereon, wherein at least some of the silver halide grains present in the said silver halide emulsion layer are tabular grains which have an aspect ratio of the grain size to the grain thickness of at least 5, such that the projective areas of said tabular grains represent not less than 50% of the projective areas of all the silver halide grains in said emulsion layer, the time taken for at least one silver halide emulsion layer of a 1 cm x 2 cm portion of said silver halide photographic light-sensitive material in a 1.5% by weight aqueous solution of sodium hydroxide at 50°C to commence to dissolve is at least 45 minutes, and on the side bearing the hydrophilic colloidal layer containing said silver halide emulsion layer, gelatin is present in an amount from 2.00 to 3.20 g/m².
Claim 3
Dependent Claim
29 words
A silver halide photographic light-sensitive material according to claim 1, wherein at least said emulsion layer has been hardened with at least one vinylsulfone or halogen substituted-s-triazine type hardener.
Claim 4
Dependent Claim
25 words
A silver halide photographic light-sensitive material according to claim 1 or 2, wherein said aspect ratio of the tabular grains is from 5 to 40.
Claim 5
Dependent Claim
23 words
A silver halide photographic light-sensitive material according to claim 3, wherein said aspect ratio of the tabular grains is from 8 to 30.
Claim 6
Dependent Claim
25 words
A silver halide photographic light-sensitive material according to any one of the preceding claims wherein the thickness of said tabular grains does not exceed 0.5µm.
Claim 7
Dependent Claim
22 words
A silver halide photographic light-sensitive material according to claim 5, wherein the thickness of said tabular grain does not exceed 0.3 µm.
Claim 8
Dependent Claim
26 words
A silver halide photographic light-sensitive material according to any one of the preceding claims, wherein the size of said tabular grains does not exceed 0.6 µm.
Claim 9
Dependent Claim
22 words
A silver halide photographic light-sensitive material according to claim 7, wherein the size of said tabular grains does not exceed 0.8 µm.
Claim 10
Dependent Claim
26 words
A silver halide photographic light-sensitive material according to any one of the preceding claims, wherein gelatin is present in an amount from 2.40 to 2.90 g/m².
Claim 11
Dependent Claim
23 words
A silver halide photographic light-sensitive material according to claim 9, wherein the gelatin is present in an amount from 2.50 to 2.80 g/m².
Claim 12
Dependent Claim
22 words
A silver halide photographic light-sensitive material according to any one of the preceding claims, wherein said tabular grains are of silver iodobromide.
Claim 13
Dependent Claim
26 words
A silver halide photographic light-sensitive material according to claim 11, wherein said tabular grains are of silver iodobromide and 0 to 10 mol% of silver iodide.
Claim 14
Dependent Claim
26 words
A silver halide photographic light-sensitive material according to claim 12, wherein said tabular grains are of silver iodobromide and 0.1 to 6 mol% of silver iodide.
Claim 15
Independent Claim
40 words
A method for processing a silver halide photographic light-sensitive material as defined in any one of the preceding claims which comprises processing the material in an automatic processor of which the whole processing time is from 20 to 60 seconds.
References Cited (Backward Citations)
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