from the squashed and broken microcapsule. Also, the first type of microcapsule is coated with a first radiation absorbent material absorbing electromagnetic radiation having a first specific wavelength, so as to be heated to the first predetermined temperature by irradiation with a first beam of radiation having the first specific wavelength, and the second type of microcapsule is coated with a second radiation absorbent material absorbing electromagnetic radiation having a second specific wavelength, so as to be heated to the second predetermined temperature by irradiation with a second beam of radiation having the second specific wavelength. Preferably, the first radiation absorbent material comprises a first infrared absorbent pigment that exhibits one of a transparent pigmentation and a milky white pigmentation, and the second radiation absorbent material comprises afilm irradiated by the first beam of radiation, is heated to the first predetermined temperature. The irradiating unit may comprise an optical scanning system that includes a first radiation beam emitter that emits the first beam of radiation, and an optical deflector that deflects the first beam of radiation so as to scan the sheet of transparent film with the deflected beam of radiation. Preferably, the first radiation beam emitter comprises a first infrared source that emits an infrared beam as the first beam of radiation.
In the image-forming system according to the second aspect of the present invention, when the layer of microcapsules of the image-forming substrate contains the first and second types of microcapsules, the image-forming apparatus further includes a second pressure application unit that exerts the