EP 0617324 B1 19970514 - Use of pyrazolidinone compounds to reduce granularity of photographic silver halide materials
Title (en)
Use of pyrazolidinone compounds to reduce granularity of photographic silver halide materials
Title (de)
Verwendung von Pyrazolidinon-Verbindungen zur Verringerung der Granularität von photographischen Silberhalogenid-Materialien
Title (fr)
Utilisation de composés pyrazolidinone pour réduire la granularité de matériaux photographiques à l'halogénure d'argent
Publication
Application
Priority
GB 9306355 A 19930326
Abstract (en)
[origin: EP0617324A1] A method of reducing the granularity of an imagewise exposed photographic silver halide colour negative material comprising a support bearing at least one photosensitive silver halide emulsion layer having associated therewith a dye image-forming coupler which method includes processing the imagewise exposed colour negative material to form at least one silver image and corresponding dye image by treatment in a colour developer solution containing a primary amino colour developing agent wherein the colour negative material contains a pyrazolidinone compound of the formula: <CHEM> or a precursor thereof in such amount that the granularity is reduced without any substantial change in dye density at the same level of exposure.
IPC 1-7
IPC 8 full level
G03C 7/00 (2006.01); G03C 7/392 (2006.01); G03C 7/413 (2006.01)
CPC (source: EP)
G03C 7/39252 (2013.01); G03C 7/413 (2013.01)
Designated contracting state (EPC)
GB
DOCDB simple family (publication)
EP 0617324 A1 19940928; EP 0617324 B1 19970514; GB 9306355 D0 19930519; JP H06308690 A 19941104
DOCDB simple family (application)
EP 94200769 A 19940324; GB 9306355 A 19930326; JP 5715994 A 19940328