Silver halide photographic material comprising two kinds of monodisperse emulsions differing in mean grain size

A silver halide photographic material comprising at least one negative type silver halide emulsion layer coated on a support, said emulsion comprising two kinds of monodisperse emulsions each having a means grain sizes of not more than 0.5 micron and, differing in mean grain size from each other at...

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Bibliographic Details
Main Author KUWABARA; KEN-ICHI
Format Patent
LanguageEnglish
Published 22.11.1988
Edition4
Subjects
AUXILIARY PROCESSES IN PHOTOGRAPHY
CINEMATOGRAPHY
ELECTROGRAPHY
GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC
GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS
HOLOGRAPHY
PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR,STEREO-PHOTOGRAPHIC PROCESSES
PHOTOGRAPHY
PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES
PHYSICS
TECHNICAL SUBJECTS COVERED BY FORMER USPC
TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ARTCOLLECTIONS [XRACs] AND DIGESTS
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Summary:A silver halide photographic material comprising at least one negative type silver halide emulsion layer coated on a support, said emulsion comprising two kinds of monodisperse emulsions each having a means grain sizes of not more than 0.5 micron and, differing in mean grain size from each other at least by 0.1 micron, and said photographic material further comprising a hydrazine derivative in at least one photographic layer, whereby negative images of high density and very high contrast can be obtained with a high photographic speed and without black spots.
Bibliography:Application Number: US19870115645