Global Patent Index - EP 0097720 A4

EP 0097720 A4 19840810 - PROCESS FOR PREPARING SILVER HALIDE EMULSION.

Title (en)

PROCESS FOR PREPARING SILVER HALIDE EMULSION.

Title (de)

VERFAHREN ZUR HERSTELLUNG EINER SILBERHALIDEMULSION.

Title (fr)

PROCEDE DE PREPARATION D'UNE EMULSION D'HALOGENURE D'ARGENT.

Publication

EP 0097720 A4 19840810 (EN)

Application

EP 83900062 A 19821220

Priority

JP 20552481 A 19811219

Abstract (en)

[origin: EP0097720A1] A process for preparing a silver halide emulsion containing core shell type silver halide grains, which comprises using silver halide grains of octahedral or tetradecahedral crystals having a (1 1 1) face substantially comprising silver bromoiodide and having a variation coefficient of particle size distribution of 0.18 or less, and subjecting them to gold-sulfur sensitization or gold-selenium sensitization in the presence of a nitrogen-containing heterocyclic compound capable of forming a complex with silver or its ion. This emulsion shows a remarkably high photographic sensitivity and less reciprocity law failure in high illuminance region, and undergoes less fogging, thus being suitable as a silver halide photographic light-sensitive material.

IPC 1-7

G03C 1/02

IPC 8 full level

G03C 1/005 (2006.01); G03C 1/015 (2006.01); G03C 1/035 (2006.01); G03C 1/08 (2006.01); G03C 1/09 (2006.01)

CPC (source: EP)

G03C 1/015 (2013.01); G03C 1/035 (2013.01); G03C 2001/03529 (2013.01); G03C 2001/03535 (2013.01); G03C 2001/03564 (2013.01); G03C 2200/06 (2013.01)

Citation (search report)

Designated contracting state (EPC)

BE DE FR NL

DOCDB simple family (publication)

EP 0097720 A1 19840111; EP 0097720 A4 19840810; EP 0097720 B1 19861126; DE 3274500 D1 19870115; GB 2125981 A 19840314; GB 2125981 B 19860212; GB 8322389 D0 19830921; JP H0353619 B2 19910815; JP S58126526 A 19830728; WO 8302174 A1 19830623

DOCDB simple family (application)

EP 83900062 A 19821220; DE 3274500 T 19821220; GB 8322389 A 19821220; JP 20552481 A 19811219; JP 8200471 W 19821220