SILVER HALIDE PHOTOGRAPHIC SENSITIVE MATERIAL

PURPOSE:To dye only the desired layer to absorb light in a near IR region and to speed up the decoloration by a photographic processing by incorporating the solid fine particle dispersing element of a specific dye into the photosensitive material. CONSTITUTION:This photosensitive material is provided with the hydrophilic colloidal layer contg. the solid fine particle dispersing element of the dye expressed by formula I. In the formula, R1, R2 denote alkyl, alkenyl, etc.; R3, R4 denote H, monovalent group; Z1, Z2 denote the atom group necessary for forming a desired nitrogenous heterocycle; L is methyne, a combination group combined with a methyne group by conjugated double bonds; X denotes anion; l1, l2 denote 0, 1. This dye (e.g.: the compd. expressed by formula II) is ground to fine particles by a sand mill, etc. and can be dispersed into an aq. gelatin soln. The incorporation of these particles into a halation preventive layer, etc., is possible.