Risograph printing originated in Japan as a fast and inexpensive image duplication technique. It has gained acclaim in the art world for its rich spot colors and an ink texture similar to screen printing.
The risograph creates a stencil that is automatically wrapped around an ink drum. When the drum rotates, ink is pressed through the stencil and transferred onto paper as sheets travel through the machine. The soy-based inks used in riso printing are low-VOC and require no solvents or chemicals for cleanup, making riso a uniquely environmentally friendly form of printing.