an apparatus for glossing a developer sheet is provided . the developer sheet has a thermoplastic developer resin on the surface thereof wherein the thermoplastic developer resin is capable of forming a film which imparts gloss upon the application of heat thereto . in the process , an arched plate is heated to a temperature sufficient to cause the thermoplastic developer resin to coalesce . the arched plate has a heat transfer limiting blanket thereon to maintain the flatness of the developer sheet . the developer sheet is fed between the convex side of the heated arched plate and a belt held snugly against the plate . the belt is driven so as to move the developer sheet over the heated arched plate .