EP 0446457 B1 19961030 - Alkaline black-and-white photographic developer
Title (en)
Alkaline black-and-white photographic developer
Title (de)
Alkalischer photographischer Schwarzweissentwickler
Title (fr)
Révélateur photographique alcalin pour noir et blanc
Publication
Application
Priority
IT 1964590 A 19900312
Abstract (en)
[origin: EP0446457A2] Alkaline aqueous black-and-white photographic developer for processing of silver halide radiographic materials comprising (1) a hydroquinone, (2) a 3-pyrazolidone developing agent, (3) a dialdehyde hardener, (4) antifoggants, (5) a sequestering agent, (6) a sulfite antioxidant, and (7) a buffering agent wherein said sequestering agent is a cyclicaminomethane diphosphonic acid compound. Preferably, the antifoggants comprise a combination of a benzotriazole-type antifoggant, an indazole-type antifoggant and a mercaptotetrazole-type antifoggant.
IPC 1-7
IPC 8 full level
G03C 5/16 (2006.01); G03C 5/30 (2006.01); G03C 1/00 (2006.01); G03C 5/305 (2006.01); G03D 3/08 (2006.01)
CPC (source: EP)
G03C 5/3053 (2013.01)
Citation (examination)
EP 0307867 A2 19890322 - KONISHIROKU PHOTO IND [JP]
Designated contracting state (EPC)
BE CH DE FR GB LI
DOCDB simple family (publication)
EP 0446457 A2 19910918; EP 0446457 A3 19920226; EP 0446457 B1 19961030; DE 69029032 D1 19961205; DE 69029032 T2 19970306; IT 1240596 B 19931217; IT 9019645 A0 19900312; IT 9019645 A1 19910912; JP 2989289 B2 19991213; JP H04219753 A 19920810
DOCDB simple family (application)
EP 90124427 A 19901217; DE 69029032 T 19901217; IT 1964590 A 19900312; JP 4347491 A 19910308