1. A process of improving a quality of a toner image fixed on a recording amterial, comprising the steps of: overlaying a processing sheet on a fixed image bearing side of the recording material to cover the fixed toner image with the processing sheet, and heating and pressing the recording material and said processing sheet to fuse the image adjacent to the processing sheet; and peeling the processing sheet off the recording material after the image is sufficiently cooled to provide a toner image which is condensed and which has been smoothed at the surface thereof.