EP 1014175 A1 20000628 - Method of preparing silver halide emulsion containing homogeneous and thin tabular crystals
Title (en)
Method of preparing silver halide emulsion containing homogeneous and thin tabular crystals
Title (de)
Verfahren zur Herstellung einer homogenen und dünne tafelförmige Körner enthaltenden Silberhalogenidemulsion
Title (fr)
Méthode de production d'émulsion à l'halogénure d'argent contenant des cristaux tabulaires homogènes et fins
Publication
Application
Priority
EP 98204367 A 19981221
Abstract (en)
Method of preparing a photosensitive element containing a silver halide emulsion with homogeneous and thin tabular crystals, comprising the steps of: (1) forming silver halide nuclei by simultaneously adding an aqueous silver salt and a halide salt solution to a reaction vessel (a), containing an aqueous solution of a protective colloid, (2) transfering the dispersion of silver halide nuclei formed in vessel (a) to a mixing chamber (b) and diluting said dispersion, (3) growing in a growth chamber (c) said nuclei of the diluted dispersion by adding and mixing an aqueous silver salt and a halide salt solution and collecting the grown crystals in reaction vessel (a) which is a part of a closed circuitry together with the mixing and growth chambers (b) and (c), (4) transfering said silver halide crystal dispersion to mixing chamber (b) and diluting the dispersion, (5) further growing the silver halide crystals in growth chamber (c) and collecting the silver halide crystals in reaction vessel a), (6) concentrating the emulsion of silver halide crystals simultaneously with the step of growing in order to keep the emulsion level in reaction vessel (a) controlled. <IMAGE>
IPC 1-7
IPC 8 full level
G03C 1/005 (2006.01); G03C 1/015 (2006.01); G03C 1/035 (2006.01); G03C 1/498 (2006.01)
CPC (source: EP)
G03C 1/0051 (2013.01); G03C 1/015 (2013.01); G03C 1/49818 (2013.01); G03C 2001/0156 (2013.01); G03C 2001/0157 (2013.01); G03C 2001/03529 (2013.01); G03C 2200/43 (2013.01)
Citation (search report)
- [XY] US 5145768 A 19920908 - ICHIKAWA YASUNORI [JP], et al
- [Y] EP 0816911 A1 19980107 - KONISHIROKU PHOTO IND [JP]
- [Y] US 5270159 A 19931214 - ICHIKAWA YASUNORI [JP], et al & JP H02172816 A 19900704 - FUJI PHOTO FILM CO LTD
- [Y] EP 0697618 A1 19960221 - FUJI PHOTO FILM CO LTD [JP]
- [A] EP 0102320 A2 19840307 - CIBA GEIGY AG [CH]
- [Y] "Low Silver Halide Concentration Process", RESEARCH DISCLOSURE., vol. 340, no. 37, August 1992 (1992-08-01), HAVANT GB, pages 612 - 615, XP000328072
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
DOCDB simple family (application)
EP 98204367 A 19981221; JP 36012399 A 19991220