Title (en)

HIGH CONTRAST PHOTOGRAPHIC MATERIALS CONTAINING MICROCRYSTAL DISPERSIONS OF HYDRAZINES

Publication

EP 0326433 A3 19910116 (EN)

Application

EP 89300866 A 19890130

Priority

GB 8802024 A 19880129

Abstract (en)

[origin: EP0326433A2] A negative acting photographic material capable of producing a high contrast image comprising a photographic silver halide emulsion in association with a water-insoluble hydrazine in the form of microcystals having a mean particle size of not more than 10 microns, preferably 0.05 to 5 microns. The microcrystals may be in the photographic silver halide emulsion or in a layer adjacent thereto.

IPC 1-7

G03C 1/10

IPC 8 full level

G03C 1/005 (2006.01); G03C 1/06 (2006.01)

CPC (source: EP)

G03C 1/005 (2013.01); G03C 1/061 (2013.01)

Citation (search report)

• [X] EP 0253665 B1 19920102
• [YD] DE 3246826 A1 19830630 - FUJI PHOTO FILM CO LTD [JP]
• [Y] DE 2803196 A1 19780803 - KONISHIROKU PHOTO IND

Designated contracting state (EPC)

BE DE FR GB IT NL

DOCDB simple family (publication)

EP 0326433 A2 19890802; EP 0326433 A3 19910116; EP 0326433 B1 19960403; DE 68926127 D1 19960509; DE 68926127 T2 19960829; GB 8802024 D0 19880224; JP H023033 A 19900108

DOCDB simple family (application)

EP 89300866 A 19890130; DE 68926127 T 19890130; GB 8802024 A 19880129; JP 1936389 A 19890127