Silver halide photographic material and method of forming images using the same

A silver halide photographic material which comprises a support having provided thereon at least one light-sensitive emulsion layer containing silver halide grains having a silver chloride content of at least 95 mole %:

• wherein
• said silver halide grains each has a phase containing silver iodide in a proportion of at least 0.1 mole % for every 1 mole of total silver halides constituting the grains in the surface part situated outside the central part occupying at least 50% of the volume of each grain and, outside of this part, has no silver iodide-free layer or further has a silver iodide-free layer continuously or discontinuously the thickness of which is 0.002 .mu.m or below;
• and
• said emulsion layer further comprises a compound represented by the following formula (I):
• ##STR31## wherein Z.sub.1 and Z.sub.2 independently represent nonmetal atoms completing a benzothiazole ring which may have a substituent, excluding aromatic hydrocarbon groups and aromatic heterocyclic groups, or is fused together with --O--CH.sub.2 --O--;
• R.sub.1 and R.sub.2 independently represent an alkyl group;
• and M.sub.1 represents a counter ion for neutralizing the intramolecular charge, or it is absent when the compound forms an inner salt.