SILVER-HALIDE PHOTOGRAPH MATERIAL FOR DIRECT POSITIVE WHICH UNDERGOES SPECTROSCOPIC SENSITIZATION AND PREPARATORY FOGGING

摘要

PURPOSE: To provide a photographic material which has high sensitivity, is developable in the conventional surface developing agent without additional processing and is capable of forming an image having good properties and more particularly a high contrast. CONSTITUTION: This photographic material includes at least one layers contg. direct position silver halide emulsions subjected to spectral sensitization with at one or more kinds of electron receptive sensitizing dyes and subjected to prefogging processing in a total amt. of at least 0.15millimol/mol silver halide on a base. The direct position silver halide crystals subjected to the prefogging processing contain silver chloride in at least a range of 60mol%, silver bromide 0.5 to 39.98mol% and silver iodide 0.02 to 2mol%. The material has pH of max. 7 at 25 deg.C. The silver halide crystals contain silver iodide in an amt. of 0.20millimol/mol AgX in outer 10wt.% of the crystals and the layer thereof contains Ca<2+> -contg. gelatin species in an amt. of a range of 0.2 to 1wt.%.