A process of forming super high contrast negative photographic materials in a developer having a pH of from 9.6 to 11.0 wherein the photographic material contains a hydrazine compound and a nucleation accelerator. The nucleation accelerator is represented by formula (Ia):Y[(A.sub.1).sub.p A.sub.2 --B].sub.m (Ia)wherein Y represents a group adsorbing onto silver halide; A.sub.1 represents a divalent linkage group composed of an atom or an atomic group selected from hydrogen, carbon, nitrogen, oxygen, and sulfur and selected from ##STR1## with a straight chain or branched alkylene group wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6, R.sub.7, R.sub.8, R.sub.9 and R.sub.10 each represents hydrogen, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted alkenyl group or a substituted or unsubstituted aralkyl group; A.sub.2 represents a divalent linkage group selected from a straight chain or branched alkylene group, a straight chain or branched alkenylene group, a straight chain or branched aralkylene group or a straight chain or branched arylene group; B represents a substituted or unsubstituted amino group, an ammonium group, or a nitrogen-containing heterocyclic ring; m represents the integer 1, 2, or 3; and p represents 0 or the integer 1.