Risograph

Risograph printing is a general term for stencil printing done with digital duplicator machines, where a digitally-produced stencil on waxy paper is wrapped around a print drum, creating ink impressions onto paper one color at a time.

The term risograph refers to the print method, as well as the machines used to do the printing. Risograph as a term comes from the machines made by the RISO Kagaku corporation, which makes many types of printers including the RISOGRAPH series of digital duplicators. Other companies like Ricoh and Gestetner also make machines which use similar process. Artists and artist publishers use "riso", "riso printing", and "risograph" printing to refer to the type of printmaking method and machine as a general process, similar to how kleenex became a generic name for all types of tissues.

Digital duplicators were developed from mimeograph machines and were originally used in office, school, and religious settings, before being adopted by artists and artist publishers for stencil printing as a printmaking and publishing method. Knust in the Netherlands were some of the early artists propagating the use of stencil printing.