Silver halide photosensitive material and process of producing black and white image using the same

A method of forming a black-and-white image, comprising:

• providing a silver halide photographic photosensitive material comprising a support and at least one silver halide photosensitive layer provided on the support,
• subjecting the silver halide photographic photosensitive material to imagewise exposure, and
• subjecting the silver halide photographic photosensitive material to a development and fixing treatment to form a black-and-white image thereon;
• wherein
• the at least one silver halide photosensitive layer comprises silver halide grains,
• the average equivalent sphere diameter of the silver halide grains contained in the at least one silver halide photosensitive layer is 0.30 μm or less,
• the silver halide photosensitive layer comprises four or more silver halide emulsions having mutually different average equivalent sphere diameters, and
• the thickness between a surface of the support at a side at which the silver halide photosensitive layer is provided and a surface of the silver halide photosensitive layer at a side opposite to the support is 10 μm or less.