A printing plate making attachment for a graphic art camera taking the place of the ordinary silver halide film cartridge back. The attachment includes an endless belt of flexible electrophotograhic film that is charged by a source of corona, exposed and then rotated to a location where an ink-receptive toner in liquid form is applied to the resulting latent image under bias conditions. A supply of plate material such as paper, aluminum, plastic or other flexible substrate material is included and a single sheet of the plate material is fed into the nip of a pressure roller engaging against the endless belt, causing the toned image to be transferred from the belt to the plate material. The plate material containing the toned image is then fed past a fixing station and thereafter dispensed as a completed plate. The plate is suitable for us in an offset printing press.