The Ricoh Aficio 1035/2045/3035/3045 OPC Drum is the organic photoconductor (OPC) drum unit used in those Ricoh Aficio multifunction printers and copiers; it’s the key component that transfers toner onto paper during the laser printing process to produce clear, sharp text and images, and you typically replace it when print quality starts to fade or show defects to maintain consistent output.