Process for improving image-sharpness of photographic silver halide material

A process for improving image-sharpness of a photosensitive material comprising a support having thereon at least one layer containing a negative working photographic emulsion containing randomly dispersed light-sensitive silver halide grains having an average grain size of from 0.3 to 3.0 microns in diameter, as the main silver halide image-yielding component thereof in a photographically compatible dispersing medium, which process comprises incorporating at random in said emulsion prior to adding any sensitizing dye to said emulsion super-fine grains of silver halide having an average grain size of less than 0.2 microns in diameter in said emulsion in an amount of from 10 g to 50 g per 100 g of said dispersing medium, said super-fine grains of silver halide co-existing with said light-sensitive silver halide grains and being substantially transparent to visible rays and contributing very little to the formation of an image directly, whereby said emulsion exhibits increased image sharpness without a significant decrease in speed and/or gradation.