High bromide (111) tabular grain emulsions precipitated in a novel dispersing medium
AssigneeEastman Kodak Company
InventorJoe E. Maskasky
Life of this patent
Estimating the term…
Abstract
A radiation-sensitive emulsion is disclosed comprised of a dispersing medium and a coprecipitated grain population having a coefficient of variation of less than 30 percent. The coprecipitated grain population consists essentially of tabular grains containing greater than 50 mole percent bromide, based on silver, and having {111} major faces. The dispersing medium is comprised of (a) a cationic starch peptizer and (b) a polyalkylene oxide block copolymer surfactant.
Claims17
A radiation-sensitive emulsion comprised of a dispersing medium and a coprecipitated grain population having a coefficient of variation of less than 30 percent and consisting essentially of tabular grains containing greater than 50 mole percent bromide, based on silver, and having {111} major faces,
- wherein said dispersing medium is comprised of
- (a) a cationic starch peptizer and
- (b) a polyalkylene oxide block copolymer surfactant.
Dependencies are inferred from the claim text.