Patent EP0302528A2 successfully refreshed from Google Patents.
EP0302528A2
Expired / Lapsed
EP
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Process for producing a silver halide photographic material
Assignee: Fujifilm Holdings Corp
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Filing: 1988-08-08
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Granted: —
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Expires: 2008-08-08
Abstract
Abstract A silver halide photographic material composed of a support having thereon at least one silver halide emulsion layer containing substantially normal silver halide grains having a (111) plane and a (100) plane and capable of preferentially forming a latent image on the (100) plane; the (111) plane occupying at least about 40% of the surface of the grains or the (100) plane occupying more than about 60% of the surface of the grains; provided that when the (111) plane occupies at least about 40% of the surface of the grains, the grains are spectrally sensitized with (a) at least one spectral sensitizing dye selectively. adsorbed more on the (100) plane than on the (111) plane, or (b) at least one spectral sensitizing dye selectively adsorbed more on the (111) plane than on the (100) plane. Since most of a sensitizing dye and the site where a latent image is formed can be separated on the surface of silver halide grains, the photographic material exhibits high sensitivity even when developed with a developing solution having low solubility.
Inventors
- 👤 Hiroyuki Mifune
- 👤 Shunji Takada
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 22:37
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/035; G03C1/06; G03C1/08; G03C1/10; G03C1/12
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
134 words
A silver halide photographic material comprising a support having thereon at least one silver halide emulsion layer comprising substantially normal silver halide grains comprising a (111) plane and a (100) plane and capable of preferentially forming a latent image on said (100) plane; said (111) plane occupying at least about 40% of the surface of said grains or said (100) plane occupying more than about 60% of the surface of said grains; provided that when said (111) plane occupies at least about 40% of the surface of said grains, said grains are spectral sensitized with (a) at least one spectral sensitizing dye selectively adsorbed more on said (100) plane than on said (111) plane, or (b) at least one spectral sensitizing dye selectively absorbed more on said (111) plane than on said (100) plane.
Claim 2
Dependent Claim
134 words
A silver halide photographic material comprising a support having thereon at least one silver halide emulsion layer comprising substantially normal silver halide grains comprising a (111) plane and a (100) plane and capable of preferentially forming a latent image on said (100) plane; said (111) plane occupying at least about 40% of the surface of said grains or said (100) plane occupying more than about 60% of the surface of said grains; provided that when said (111) plane occupies at least about 40% of the surface of said grains, said grains are spectral sensitized with (a) at least one spectral sensitizing dye selectively adsorbed more on said (100) plane than on said (111) plane, or (b) at least one spectral sensitizing dye selectively absorbed more on said (111) plane than on said (100) plane.
Claim 3
Dependent Claim
82 words
The silver halide photographic material as claimed in Claim 1, wherein said silver halide emulsion layer comprises said substantially normal silver halide grains comprising a (111) plane and a (100) plane, and capable of preferentially forming a latent image on said (100) plane; said (111) plane occupying at least about 40% of the surface of said grains; and said grains being spectrally sensitized with at least one spectral sensitizing dye selectively adsorbed more on said (111) plane than on said (100) plane.
Claim 4
Dependent Claim
82 words
The silver halide photographic material as claimed in Claim 1, wherein said silver halide emulsion layer comprises said substantially normal silver halide grains comprising a (111) plane and a (100) plane, and capable of preferentially forming a latent image on said (100) plane; said (111) plane occupying at least about 40% of the surface of said grains; and said grains being spectrally sensitized with at least one spectral sensitizing dye selectively adsorbed more on said (100) plane than on said (111) plane.
Claim 5
Dependent Claim
57 words
The silver, halide photographic material as claimed in Claim 1, wherein said silver halide emulsion layer comprises said substantially normal silver halide grains comprising a (111) plane and a (100) plane, and capable of preferentially forming a latent image on said (100) plane; said (100) plane occupying more than about 60% of the surface of said grains.
Claim 6
Dependent Claim
104 words
The silver halide photographic material as claimed in Claim 1, wherein said silver halide emulsion layer comprises at least 50%, based on the total projected area of silver halide grains, of said substantially normal silver halide grains mainly comprising a (111) plane and a (100) plane; said (111) plane occupying at least about 40% of the surface of said grains; at least 60% of the number of said normal grains being spectrally sensitized with at least one sensitizing dye selectively adsorbed more on said (111) plane than on said (100) plane and being capable of preferentially forming a latent image on said (100) plane.
Claim 7
Dependent Claim
27 words
The silver halide photographic material as claimed in Claim 1, wherein said (111) plane occupies at least about 60% of the surface of said substantially normal grains.
Claim 8
Dependent Claim
46 words
The silver halide photographic material as claimed in Claim 6, wherein said (111) plane occupies at least about 80% of the surface of said substantially normal grains, and said (100) plane occupies from about 5 to about 20% of the surface of said substantially normal grains.
Claim 9
Dependent Claim
21 words
The silver halide photographic material as claimed in Claim 1, wherein said (100) plane is selectively sensitized with a chemical sensitizer.
Claim 10
Dependent Claim
23 words
The silver halide photographic material as claimed in Claim 8, wherein said chemical sensitizer is .a sulfur sensitizer or a noble metal sensitizer.
Claim 11
Dependent Claim
37 words
The silver halide photographic material as claimed in Claim 2, wherein said spectral sensitizing dye is a cyanine dye selected from a thiocyanine dye, a selenacyanine dye, a quinocyanine dye, a thiaquinocyanine dye and a selenaquinocyanine dye.
Claim 12
Dependent Claim
53 words
The silver halide photographic material as claimed in Claim 10, wherein said cyanine dye is selected from a benzothiacyanine, a benzoselenacyanine and a benzothiaselenacyanine, each substituted with a halogen at the 5-position; a thiaquinocyanine or selenaquinocyanine, each comprising a thiazole or selenazole ring substituted with a halogen at the 5-position; and a quinocyanine.
Claim 13
Dependent Claim
36 words
The silver halide photographic material as claimed in Claim 2, wherein said sensitizing dye is present in an amount sufficient to saturate said (111) plane and at most sufficient to saturate said (111) and (100) planes.
Claim 14
Dependent Claim
61 words
The silver halide photographic material as claimed in Claim 3, wherein said sensitizing dye is selected from benzoxacyanine, benzimidacyanine, benzoxaimidacyanine, benzoxathiacyanine, benzimidathiacyanine, benzoxaselenacyanine, benzimidaselenacyanine, benzothiacyanine having a substituent other than a halogen atom at the 5-position, benzoselenacyanine having a substituent other than a halogen atom at the 5-position, and benzothiaselenacyanine having a substituent other than a halogen atom at the 5-position.
Claim 15
Dependent Claim
36 words
The silver halide photographic material as claimed in Claim 1, wherein said spectral sensitizing dye is present in an amount from about 1 × 10⁻⁷ to 2 × 10⁻³ mol per mol of said silver halide.
Claim 16
Dependent Claim
36 words
The silver halide photographic material as claimed in Claim 14, wherein said spectral sensitizing dye is present in an amount from about 1 × 10⁻⁶ to 1 × 10⁻³ mol per mol of said silver halide.
Claim 17
Dependent Claim
34 words
The silver halide photographic material as claimed in Claim 3, wherein said silver halide comprises at least 50 mol% silver bromide, at most 38 mol% silver iodide and at most 50 mol% silver chloride.
Claim 18
Dependent Claim
34 words
The silver halide photographic material as claimed in Claim 16, wherein said silver halide comprises at least 70 mol% silver bromide, at most 20 mol% silver iodide and at most 30 mol% silver chloride.
Claim 19
Dependent Claim
40 words
The silver halide photographic material as claimed in Claim 2, wherein said silver halide is selected from silver bromide, silver iodobromide, silver iodochlorobromide containing at most 50 mol% silver chloride, and silver chlorobromide containing at most 50 mol% silver chloride.
Claim 20
Dependent Claim
26 words
The silver halide photographic material as claimed in Claim 4, wherein said (100) plane occupies at least about 65% of the surface of said normal grains.
Claim 21
Dependent Claim
26 words
The silver halide photographic material as claimed in Claim 19, wherein said (100) plane occupies at least about 70% of the surface of said normal grains.
References Cited (Backward Citations)
No citation records indexed.
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