RISO Printer-Duplicator, a.k.a. Risograph.With a print speed from 90 to130 pages per minute you can make short work of the largest job: a 500 sheets print run takes less than four minutes to finish, so you can print Exam/Test Question Papersfor a whole school or fliers for an announcement campaign in an incredibly short time.RISO presents five powerful machines engineered to print high volumes at ultra high speed, year after year. Specifically designed to give you the ultimate in ease of use, these advanced printers require virtually no operator training. What\'s more, they are also extremely economical - factor in the costs of labor and time, as well as consumables such as master, ink and paper, and you have unbeatable cost-performance. This low-cost operation is further enhanced by the printers\' minimal consumption of electricity: unlike a copier that constantly heats a thermal print drum, the Risograph series use very little energy when not actually printing. It all adds up to the ideal solution for high-speed, high-volume, on-demand two color printing with the ultimate in versatility, cost-efficiency and ease of use.