| 摘要 |
A novel silver halide photographic material is provided comprising at least one light-sensitive silver halide emulsion layer provided on a support and containing at least one hydrazine compound and at least one amine compound of the general formula (I) in said emulsion layer or at least one of other constituting layers, provided that said hydrazine compound and said amine compound can be present in the same or different layers: <IMAGE> (I) wherein R2 and R3, which can be the same or different, each represents a substituted or unsubstituted alkyl group or R2 and R3 may be linked to each other to form a ring; R4 represents a substituted or unsubstituted alkyl, aryl or heterocyclic group; A represents a divalent linkage group; X represents -CONR5-, -OCONR5-, -NR5CONR5-, -NR5COO-, -COO-, -OCO-, -CO-, -NR5CO-, -SO2NR5-, -NR5SO2-, -SO2-, -S- or -O- group (in which R5 represents a hydrogen atom or a lower alkyl group having 1 to 5 carbon atoms); and n represents an integer of 0 or 1, with the proviso that the total number of carbon atoms contained in R2, R3, R4 and A is 20 or more. Furthermore, a novel method for forming a superhigh contrast negative image is provided which comprises imagewise exposing a silver halide photographic material comprising at least one silver halide emulsion layer provided on a support and containing at least one hydrazine compound and at least one amine compound of the general formula (I) in said emulsion layer of at least one of other constituting layers to light provided that said hydrazine compound and said amine compound can be present in the same or different layers, and then developing the silver halide photographic material thus exposed with a developing solution having a pH value of 10.5 to 12.0 and containing 0.15 mol/liter or more of sulfite ions. |
