Patent ID: 8838004

Claim:
A gloss processing apparatus comprising: a gloss processing portion that performs gloss processing on a sheet of paper on which clear toner has been provisionally fixed; a gloss-level-measuring portion for a back surface of the sheet of paper which is an opposite surface of a top surface of the sheet of paper, on which the gloss processing portion performs the gloss processing, the gloss-level-measuring portion measuring a gloss level of the back surface of the sheet of paper, the gloss-level-measuring portion being positioned at an upstream side of the gloss processing portion along a sheet-transferring direction; and a control portion that is configured to select separate gloss processing modes according to a case where the gloss processing is performed on the back surface of the sheet of paper or a case where the gloss processing is not performed on the back surface of the sheet of paper, based on a measurement result of the gloss-level-measuring portion for the back surface of the sheet of paper, wherein the control portion changes its processing mode to the gloss processing mode selected on the base of the measurement result of the gloss-level-measuring portion for the back surface of the sheet of paper when the control portion determines that the gloss processing mode selected on the base of the measurement result of the gloss-level-measuring portion for the back surface of the sheet of paper is different from a previously set gloss processing mode.