Method for preparing a silver halide emulsion and a silver halide color photographic light-sensitive material containing the emulsion

A method for preparing a silver halide emulsion, said method comprising supplying bromine and/or bromine ion at a plurality of processing stages to silver halide host grains to form a phase rich in silver bromide in the vicinity of the apexes of the grains, said host grains being substantially of a cube or tetradecahedron and having a silver chloride content of about 95 mole % or more and a silver bromide content of about 0 to about 5 mole %;

• wherein the bromine and/or bromine ion is supplied at the plurality of stages by adding and mixing in a reaction vessel at least one of (i) a water soluble bromine compound, (ii) silver halide grains having a smaller average grain size and a larger silver bromide content than the silver halide host grains, and (iii) a bromine or bromine ion precursor represented by formula (S):
• ##STR11## wherein Y represents an organic group having a Hammett's .sigma..sub.p value of 0 or more;
• R.sub.1 and R.sub.2, which may be the same or different, are selected from hydrogen, alkyl groups, alkenyl groups, aralkyl groups, aryl groups, or an organic group as defined by Y, with the proviso that R.sub.1 and Y may combine to form a heterocyclic ring;
• and n is an integer of 1 to 3;
• and where in at least one stage of said plurality of processing stages the bromine and/or bromine ion is supplied when the formation of the silver bromide-rich phase is at least 80% complete in the previous stage.