Image forming device and method for transferring ink using a heated pneumatic drum

An image forming device having a rotating drum around which an image forming material is trained, an ink sheet conveying mechanism which conveys an ink sheet synchronously with rotation of the rotating drum, an ink transfer device which fits the image forming material and the ink sheet together and effects either heating or pressing such that ink is transferred onto the image forming material, and a fitting/conveying device which moves an image receiving material with respect to a peripheral surface of the rotating drum synchronously with the rotation of the rotating drum and which fits the image forming material and the image receiving material together and applies either a predetermined pressure or a predetermined temperature so that ink is transferred from the image forming material to the image receiving material; and an image forming method including above-described processes. Exposure need be effected only once for each color, and the image forming materials can be used repeatedly. Therefore, a plurality of color proofs can be prepared from a single original plate, and time involved in preparing the color proofs can be reduced.