Silver halide emulsions with improved speed.

摘要

Photographic, silver halide emulsions can be additionally sensitized without a deleterious increase in fog, by the addition of an alkali metal salt of 1-napthol-4-sulfonic acid. These emulsions are stable, and have good contrast and top density. The 1-napthol-4-sulfonic acid can be added conveniently from an aqueous solution and is totally compatible with conventional silver halide elements.