EP 0735412 B1 20000816 - Process of preparing a monodispersed tabular silver halide grain emulsion
Title (en)
Process of preparing a monodispersed tabular silver halide grain emulsion
Title (de)
Verfahren zur Herstellung von Emulsionen mit monodispersen Silberhalogenidtafelkörnen
Title (fr)
Procédé de préparation d'un émulsion à grain tabulaire à l'halugénure d'argent monodisperse
Publication
Application
Priority
EP 95104628 A 19950329
Abstract (en)
[origin: EP0735412A1] The present invention relates to a process for preparing tabular silver halide grain emulsions, said process comprising the following steps: (a) forming a population of silver halide nuclei in a dispersing medium, (b) ripening said population of silver halide nuclei, and (c) growing said population of silver halide nuclei to form tabular silver halide grains, characterized in that a polyalkylene oxide-polyalkylsiloxane copolymer is added during at least one of said steps (a), (b), and (c). The presence of the polyalkylene oxide-polyalkylsiloxane copolymer during tabular silver halide grain formation enable the growth of tabular silver halide grain emulsions having a reduced amount of non-conforming grains and a lower coefficient of variation (COV).
IPC 1-7
IPC 8 full level
G03C 1/005 (2006.01); G03C 1/015 (2006.01); G03C 1/035 (2006.01); G03C 1/043 (2006.01); G03C 1/06 (2006.01); G03C 1/07 (2006.01)
CPC (source: EP)
G03C 1/0051 (2013.01); G03C 1/043 (2013.01); G03C 1/07 (2013.01); G03C 1/015 (2013.01); G03C 2001/0055 (2013.01); G03C 2001/0357 (2013.01)
Designated contracting state (EPC)
FR IT
DOCDB simple family (publication)
EP 0735412 A1 19961002; EP 0735412 B1 20000816; JP H08272016 A 19961018
DOCDB simple family (application)
EP 95104628 A 19950329; JP 7625896 A 19960329