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1. (WO1991018320) SILVER HALIDE GRAINS HAVING SMALL TWIN-PLANE SEPARATIONS
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1991/018320 International Application No.: PCT/US1991/003180
Publication Date: 28.11.1991 International Filing Date: 08.05.1991
IPC:
G03C 1/005 (2006.01) ,G03C 1/18 (2006.01)
(Deprecated)
G PHYSICS
03
PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
C
PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR OR STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
1
Photosensitive materials
02
with silver salts as the only photosensitive material
05
the emulsion being prepared by flocculation
G PHYSICS
03
PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
C
PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR OR STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
1
Photosensitive materials
005
Silver halide emulsions; Preparation thereof; Physical treatment thereof; Incorporation of additives therein
06
with non-macromolecular additives
08
Sensitivity-increasing substances
10
Organic substances
12
Methine or polymethine dyes
14
with an odd number of CH groups
18
with three CH groups
Applicants:
EASTMAN KODAK COMPANY [US/US]; 343 State Street Rochester, NY 14650-2201, US
Inventors:
BLACK, Donald, Lee; US
WILSON, Robert, Don; US
Agent:
LEIPOLD, Paul, A.; 343 State Street Rochester, NY 14650-2201, US
Priority Data:
522,71814.05.1990US
Title (EN) SILVER HALIDE GRAINS HAVING SMALL TWIN-PLANE SEPARATIONS
(FR) GRANULES D'HALOGENURE D'ARGENT AYANT DE PETITES SEPARATIONS DE PLANS DOUBLES
Abstract:
(EN) The invention is generally accomplished by providing a tabular-grain silver halide emulsion in which at least 50 percent of the total grain projected area is accounted for by tabular grains having a mean diameter of at least 0.6 micrometer and a spacing between at least two parallel twin planes of less than about 0.011 micrometer. In a preferred form, at least 90 percent of the total grain projected area is accounted for by the tabular grains of the invention having a mean diameter of at least 0.6 micrometer and a spacing between at least two parallel twin planes of less than 0.012 micrometer.
(FR) Procédé généralement basé sur la production d'une émulsion de granules tabulaires d'halogénure d'argent dans laquelle au moins 50 % de la surface de projection de granules totale est constituée par des granules tabulaires ayant un diamètre moyen d'au moins 0,6 microns et un espacement entre au moins deux plans doubles parallèles inférieur à environ 0,011 microns. Dans une variante préférée, au moins 90 % de la surface de projection de granules totale est constituée par des granules tabulaires de la présente invention ayant un diamètre moyen d'au moins 0,6 microns et un espacement entre au moins deux plans doubles parallèles inférieur à 0,012 microns.
Designated States: JP
European Patent Office (AT, BE, CH, DE, DK, ES, FR, GB, GR, IT, LU, NL, SE)
Publication Language: English (EN)
Filing Language: English (EN)
Also published as:
EP0486629