Patent ID: 7303864

Claim:
A black and white photothermographic material comprising an image forming layer on at least one side of a support comprising at least a photosensitive silver halide, a non-photosensitive organic silver salt, a reducing agent for silver ions, and a binder, wherein: the non-photosensitive organic silver salt comprises at least one compound selected from a silver salt of an azole compound or a silver salt of a mercapto compound; an average silver iodide content of the photosensitive silver halide is 40 mol % or higher; and the photothermographic material further comprises a silver iodide complex-forming agent which substantially reduces visible light absorption by photosensitive silver halide after thermal development; and the photothermographic material further comprises at least one selected from a compound that can be one-electron-oxidized to provide a one-electron oxidation product which releases one or more electrons or an adsorptive redox compound having a group adsorbable to the silver halide and a reducing group in a molecule, wherein the compound that can be one-electron-oxidized to provide a one-electron oxidation product which releases one or more electrons, is at least one compound selected from the following Group 1 or Group 2: (Group 1) a compound that can be one-electron-oxidized to provide a one-electron oxidation product which further releases one or more electrons, due to being subjected to a subsequent bond cleavage reaction; (Group 2) a compound that can be one-electron-oxidized to provide a one-electron oxidation product, which further releases one or more electrons after being subjected to a subsequent bond formation reaction, and the adsorptive redox compound is represented by the following formula (I): A-(W) n —B Formula (I) wherein: A represents a group adsorbable to a silver halide; W represents a divalent linking group; n represents 0 or 1; and B represents a reducing group.