초록 ▼

A light-sensitive silver halide photographic material of internal latent image type for use in the formation of a direct positive image containing a compound of the following general formula (I) or (II): General formula (I) [Figure] General formula (II) [Figure] The photographic material can be deve

A light-sensitive silver halide photographic material of internal latent image type for use in the formation of a direct positive image containing a compound of the following general formula (I) or (II): General formula (I) [Figure] General formula (II) [Figure] The photographic material can be developed after a shortened induction period, can yield good positive images that are free from stain when undergoing fogging development, and can yield good direct positive images with a high maximum density and a low minimum density. The photographic material forms a direct positive image when subjected, after imagewise exposure, to an overall light exposure or development in the presence of a fogging agent and can be developed by surface development.

대표청구항 ▼

A direct positive photographic material comprising a layer containing an internal latent image type light-sensitive silver halide emulsion that has not been fogged coated on a support, said material containing a compound represented by the general formula (I) or (II): General formula (I) [Figure] Ge

A direct positive photographic material comprising a layer containing an internal latent image type light-sensitive silver halide emulsion that has not been fogged coated on a support, said material containing a compound represented by the general formula (I) or (II): General formula (I) [Figure] General Formula (II) [Figure] wherein R1 represents a hydrogen atom, a hydroxyl group or an alkyl, alkenyl, alkoxy, acyloxy, aralkyl or aryl group which is substituted or unsubstituted; R2, R3 and R4 each represent a hydrogen atom, a halogen atom, －SO2R7, －COR8, or an alkyl, alkenyl, alkoxy, aralkyl or aryl group which is substituted or unsubstituted; R5 represents a hydrogen atom, －COR7 or －SO2R7 and when n is 2 or 3, R5 may be same or different; R6 represents a hydrogen atom, a halogen atom or an alkyl, alkoxy, aryl or alkenyl group which may be substituted, and when m is 2, R6 may be same or different; Z represents an atomic group necessary to complete a 5 to 7-membered alkylene ring, or a chroman or coumaran ring by fusing together with benzene ring, and Z may have a spyro carbon atom; R7 represents a hydroxyl group, or an alkyl, alkoxy, aryloxy or amino group which is substituted or unsubstituted; n is 2 or 3; m is a number obtained by subtracting n from 4; and R8 represents hydrogen atom, hydroxyl group, or an alkyl, alkoxy, aryloxy or amino group which is substituted or unsubstituted, with the proviso that at least one of R1, R2, R3 and R4 is not hydrogen atoms at the same time.