Patent ID: 7262000

Claim:
An image forming method with a photothermographic sheet material, comprising imagewise exposing and thermally developing the photothermographic sheet material; wherein the photothermographic sheet material comprises at least a photosensitive silver halide having an average silver iodide content of 40% by mole or more, a non-photosensitive organic silver salt, a reducing agent and a binder, and a compound expressed by the following formula (H): Q-(Y) N —C(Z 1 )(Z 2 )X Formula (H): wherein Q represents an alkyl group, an aryl group or a hetero ring group; Y represents a divalent linkage group; N represents 0 or 1; Z 1 and Z 2 each independently represent a halogen atom; and X represents a hydrogen atom or an electron-withdrawing group; and the thermally developing being started within 60 sec after imagewise exposure of the photothermographic sheet material using an image recording apparatus having an exposure portion and a developing portion and wherein the imagewise exposing and thermal developing comprises imagewise exposing a part of the photothermographic sheet material and simultaneously developing a part of the photothermographic sheet material that has already been imagewise exposed.