Patent ID: 6492101
Filing Date: 2002-12-10
Classification: G03C

Abstract:
A method of making a monodisperse regular grain silver halide high bromide emulsion comprising precipitating regular silver halide grains comprising greater than 50 mole percent bromide, based on total silver, in a reaction vessel, and adding to the reaction vessel before or during precipitation a disulfide compound represented by the following formula (I): whereY and Z are H atoms or substituents, which may be connected to form a carbocyclic or heterocyclic ring; X is â€”Oâ€”, â€”NHâ€” or â€”NRâ€”, where R is a substituent; M is â€”Hâ€” or a cationic species; and L is a linking group, where p is 0 or 1.