With traditional 600 dpi imaging, the original is scanned and printed at a resolution of 600 x 600 dpi (dpi refers to the actual number of perforations in the master that the Printer-Duplicator produces from a scan). The RZ390 features new RISO 600e dpi digitally enhanced technology that emulates 600 dpi output. Digitally enhancing the scan raises the actual scan resolution and changes the position of the projected perforations. The perforations are paired, providing an appearance of a smoother line, similar to the curved line produced by a higher resolution scan. RISO’s emulated 600 dpi provides much-improved imaging over standard 300 x 600 dpi imaging while still remaining affordable. The Risograph RZ 390's amazing imaging is helped partly by Genuine Risograph RZ 390 Inks and Risograph RZ 390 Masters.