Image-forming method

An image-forming method which comprises exposing a photographic material comprising a support having thereon at least a photosensitive silver halide emulsion and a binder, the silver halide emulsion containing at least one compound selected from metal ions and metal complex ions which are electron traps of 0.2 eV or less in depth, with an exposing head having at least three exposure light sources having different specific light emitting wavelength regions corresponding to at least three different color sensitivities of the photographic material, each of the at least three exposure light sources having different center-of-gravity wavelengths in each of the specific light emitting wavelength regions,

• wherein each of the specific light emitting wavelength regions is from the shortest wavelength to the longest wavelength among the exposure light sources having different center-of-gravity wavelengths, and the photographic material has a sensitivity variation of 0.01 logE/nm or less in each of the specific wavelength light emitting wavelength regions, and
• wherein the exposing head performs reciprocating writing which is scanning exposure not only in one direction but on the way back.