EP 0763771 A1 19970319 - Silver halide photographic elements containing aryl hydrazines
Title (en)
Silver halide photographic elements containing aryl hydrazines
Title (de)
Arylhydrazine enthaltende photographische Silberhalogenidelemente
Title (fr)
Eléments photographiques à l'halogénure d'argent comprenant des arylhydrazines
Publication
Application
Priority
EP 95114618 A 19950918
Abstract (en)
The present invention relates to a silver halide photographic element comprising a support bearing at least one silver halide emulsion layer including negative acting surface latent image-type silver halide grains in reactive association (prior to image-wise exposure) with a hydrazine compound represented by the following formula (I) : <CHEM> wherein Ar is an aryl group, G is CO, SO, SO2, PO2, PO3 or C=NR2; R, R1, R2, which can be the same or different, are hydrogen, alkyl of 1 to 6 carbon atoms, an alkyl sulfinyl of 1 to 6 carbon atoms or a trifluoroacetyl group; n is an integer from 1 to 3; Z1 and Z2, being the same or different, are electron-withdrawing groups. This silver halide photographic element can be developed with a conventional aqueous alkaline Rapid Access type developer solution, at a pH value lower than 11.0, containing a developing agent and an auxiliary developing agent, to give high contrasts.
IPC 1-7
IPC 8 full level
G03C 1/06 (2006.01)
CPC (source: EP)
G03C 1/061 (2013.01)
Citation (search report)
- [A] EP 0444506 A1 19910904 - DU PONT DEUTSCHLAND [DE] & US 5190847 A 19930302 - CHAN DOMINIC M [US], et al
- [A] EP 0622670 A1 19941102 - MINNESOTA MINING & MFG [US]
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
DOCDB simple family (application)
EP 95114618 A 19950918