Patent ID: 6376168
Filing Date: 2002-04-23
Classification: C07C,G03C

Abstract:
A method for producing non-photosensitive fatty acid silver salt comprising the steps of reacting a silver ion-containing solution, the solvent of which being a mixture of an organic solvent and water or water, with a solution of an alkali metal salt of a fatty acid, solvent of which being water, organic solvent or a mixture of an organic solvent and water, to obtain a fatty acid silver grain; adding a dispersing agent; and desalting the obtained fatty acid silver dispersion by ultra-filtration;characterized in that pH of the dispersion is kept at 6 or above during a period from a point of time immediately after the addition of the dispersing agent to a point of time an electric conductivity of the filtrate drops below 2000 &mgr;S/cm but not lower than 500 &mgr;S/cm by the desalting operation.