| abstract |
A silver halide photographic material composed of a support having thereon at least one silver halide photosensitive emulsion layer, at least one layer of the material containing a blocked photographic reagent precursor represented by formula (I): ##STR1## wherein X 1 represents a divalent linking group containing a hetero atom bonded to the carbon atom, provided that X 1 is linked to the carbon atom by a group other than ##STR2## PUG represents a photographically useful group containing a hetero atom bonded to X 1 ; W represents ═N-- or ##STR3## Y 1 represents hydrogen or a group capable of being substituted; Z represents an atomic group necessary for forming a heterocyclic ring, provided that when W represents a ##STR4## the group adjacent to W in the heterocyclic ring is a group other than ##STR5## wherein R 1 , R 2 , R 3 , R 4 and R 5 each represents hydrogen or or group capable of being substituted; and m is 0 or 1, with proviso that when m is 0, the photographically useful group represented by PUG is bonded to a carbon atom via heteroatom of PUG. The photographic materials have superior stability during storage, and are capable of releasing a photographic reagent with specifically required timing during processing, and in a wide pH range. |