EP 0421426 A1 19910410 - Light-sensitive silver halide photographic material, silver halide emulsion, and process for preparing these.
Title (en)
Light-sensitive silver halide photographic material, silver halide emulsion, and process for preparing these.
Title (de)
Photographisches, lichtempfindliches Silberhalogenidmaterial, Silberhalogenidemulsion, und Verfahren zu ihrer Herstellung.
Title (fr)
Matériau photographique à l'halogénure d'argent sensible à la lumière, émulsion à l'halogénure d'argent, et procédé pour leur préparation.
Publication
Application
Priority
JP 25931089 A 19891003
Abstract (en)
A light sensitive silver halide phtographic material having at least one of the silver halide emulsion layers which comprises a silver halide emulsion mainly composed of twinned crystal grains and having a proportion of not more than 1/20 for a number of fogging grains to a number of total silver halide grains in the layer is disclosed. A method of preparing the silver halide emulsion is also disclosed. In the preparation process, a silver compound is added under conditions of a pH of from 1 to 5 in respect of not less than 50 mol % of residual silver compound added in a course of formation of silver halide grains, after at least 90 mol % of silver compound has been added.
IPC 1-7
IPC 8 full level
G03C 1/005 (2006.01); G03C 1/035 (2006.01); G03C 7/30 (2006.01)
CPC (source: EP)
G03C 1/0051 (2013.01); G03C 7/3022 (2013.01)
Citation (search report)
- EP 0273411 A2 19880706 - FUJI PHOTO FILM CO LTD [JP]
- US 2996382 A 19610815 - LUCKEY GEORGE W, et al
- JP S6114630 A 19860122 - KONISHIROKU PHOTO IND
- [Y] PATENT ABSTRACTS OF JAPAN vol. 10, no. 7 (P-419)(2064) 11 January 1986, & JP-A-60 164738 (KONISHIROKU) 27 August 1985,
- [Y] PHOTOGRAPHIC SCIENCE AND ENGINEERING. vol. 5, no. 6, November 1961, WASHINGTON US pages 332 - 336; C.R.Berry et al.: "Effects of environment on the Growth of Silver Bromide Microcrystals"
- [YD] RESEARCH DISCLOSURE. no. 299, March 1989, HAVANT GB pages 185 - 197; "Nucleation of Tabular Grain Emulsions at High pBr"
Designated contracting state (EPC)
DE GB IT NL
DOCDB simple family (publication)
DOCDB simple family (application)
EP 90119057 A 19901004; JP 25931089 A 19891003