EP 0943956 A1 19990922 - Radiographic material having antispot protection and improved speed to Dmin ratio
Title (en)
Radiographic material having antispot protection and improved speed to Dmin ratio
Title (de)
Photographisches Silberhalogenidemlement mit Schutz gegen Flecken und verbessertem Empfindlichkeit/Dmin-Verhältnis
Title (fr)
Elément photographique à l'halogénure d'argent ayant une protection contre les taches et un rapport de sensibilité/Dmin amelioré
Publication
Application
Priority
EP 98104883 A 19980318
Abstract (en)
The present invention relates to a process for manufacturing a silver halide photographic material comprising the step of adding to a silver halide emulsion a polyamine-polycarboxyl derivative and an aryl compound having at least two hydroxyl groups and at least one additional substituent represented by a sulfonic group, an hydroxyl group, a carboxy group or a hydroxymethyl group. The use of such a combination as antispotting agent to prevent metal contamination and to increase the speed to Dmin ratio of a silver halide photographic emulsion and a silver halide element comprising such an aryl compound is also claimed.
IPC 1-7
IPC 8 full level
G03C 1/00 (2006.01); G03C 1/33 (2006.01); G03C 5/16 (2006.01)
CPC (source: EP)
G03C 1/33 (2013.01); G03C 5/16 (2013.01); G03C 2200/42 (2013.01); G03C 2200/45 (2013.01)
Citation (search report)
- [A] US 3236652 A 19660222 - KENNARD KENNETH C, et al
- [A] GB 1221138 A 19710203 - ILFORD LTD
- [A] GB 1221137 A 19710203 - ILFORD LTD
- [A] US 3778268 A 19731211 - HAGA T, et al
- [A] WO 9014615 A1 19901129 - EASTMAN KODAK CO [US]
- [A] US 4618574 A 19861021 - CAVALLARO ANTHONY [US]
- [A] EP 0449563 A1 19911002 - KONISHIROKU PHOTO IND [JP]
- [A] CHEMICAL ABSTRACTS, vol. 79, no. 20, 19 November 1973, Columbus, Ohio, US; abstract no. 120446c, IK, CHON DU: "Photographic spot defect production by metallic impurities. IV." page 353; column l; XP002075208 & HWAHAK KWA HWAHAK KONGOP., no. 5, 1972, S. Korea, pages 258 - 261
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
DOCDB simple family (application)
EP 98104883 A 19980318; JP 7206499 A 19990317