Global Patent Index - EP 0943956 A1

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

EP 0943956 A1 19990922 (EN)

Application

EP 98104883 A 19980318

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

G03C 1/33; G03C 5/16

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)

Designated contracting state (EPC)

DE FR GB IT

DOCDB simple family (publication)

EP 0943956 A1 19990922; JP 2000066329 A 20000303

DOCDB simple family (application)

EP 98104883 A 19980318; JP 7206499 A 19990317