Risograph

The Risographie is a project carried out in the cylinder printing stencil printing method on the type of screen printing technology. The procedure was developed by the Japanese company Riso, where the method gets its name. Risographie is characterized in that the color is made on the paper without the use of chemicals and heat. The environmental advantage is accompanied by favorable consumption costs.

From an original one master slide is created, which is fully automated stretched from the device to a rotatable drum. In exposure operation, similar to the case of a copier, the master sheet is thermally perforated at the points where it is to be color pass. The paper to be printed passes in a relatively straight path, the rotating drum is brought from which the ink passed through a sieve and the matrix to the paper. This provides the Risographie for runs from 25 copies of a high speed with about 180 pages per minute.

Usually printed in black or color monochrome, with special colors are also possible. Image grids for generation of fine gray values ​​can be made directly from the original via button setting. The newer generation Risograph can be controlled directly by a computer as a network printer; newer devices also allow the two-color printing in a printing operation. Riso latest devices that enable full-color high-speed printing in a printing operation, based on the ink-jet method, and therefore do not work on the principle described herein.