Process of preparing a silver halide emulsion

摘要

A process of preparing a silver halide emulsion comprising mixing a water-soluble silver salt solution with a water-soluble halide solution in the presence of a protective colloid. Silver halide grains are formed which are octahedral or tetra decahedral silver iodobromide containing at least 4 mol % silver iodide. A tetrazaindene compound is added to the mixture before the completion of the addition of the silver salt solution.