Photothermographic material and image forming method

An image forming method comprising:

• image-wise exposing to a blue semiconductor laser which has a light emission peak intensity within a wavelength range of 350 to 450 nm a photothermographic material comprising, on a same surface of a support, a photosensitive silver halide having a silver iodide content of 40 to 100 mol %, a non-photosensitive organic silver salt of an aliphatic carboxylic acid including a silver behenate, a reducing agent, a binder, and an adsorbable redox compound represented by Formula (I), wherein, in Formula (I), A represents a group that can be adsorbed by silver halide;
• W represents a divalent connecting group;
• n represents 0 or 1;
• B represents a reducing group that is capable of reducing silver ions and is a residue derived from a compound represented Formula B13;
• and
• thermally developing the image-wise exposed photothermographic material with a developing time of 1 to 12 seconds and with a developing temperature of 110° C. to 140° C.;
• wherein in Formula B13, Rb13, represents a hydrogen atom, an alkyl group, an aryl group or a heterocyclic group;
• RH13 represents a hydrogen atom, an alkyl group, an aryl group, an acyl group, an alkylsulfonyl group or an arylsulfonyl group;
• Rb130 to Rb133 each independently represent a hydrogen atom or a substituent;
• A-(W)n—B Formula (1)
• wherein the photothermographic material further includes a compound represented by the following formula (H):
• Q-(Y)n—C(Z1)(Z2)X Formula (H)
• wherein in formula (H), Q represents an alkyl group, an aryl group or a heterocyclic group;
• Y represents a divalent connecting group;
• n represents 0 or 1;
• Z1 and Z2 each independently represent a halogen atom;
• and X represents a hydrogen atom or an electron attracting group
• and wherein the reducing agent is a compound represented by the following formula (R-1):
• wherein in formula (R-1), R11 and R11′ each independently represent an alkyl group having 1 to 20 carbon atoms;
• R12 and R12′ each independently represent an alkyl group having 2 to 20 carbon atoms;
• L represents a —S—group or a —CHR13— group;
• R13 represents a hydrogen atom or an alkyl group having 1 to 20 carbon atoms;
• X1 and X1′ each independently represent a hydrogen atom or a group that can substitute a benzene ring.