What is Riso?
Riso Kagaku is a Japanese corporation founded in 1946 by Noboru Hayama in Tokyo, Japan.
They are the inventor, manufacturer, and distributor of the Riso printer-duplicator, a.k.a. Risograph.
In Japanese, riso translates to “ideal” and kagaku to “science.”
The Risograph machines were developed in 1986, it merges the charm of traditional handcrafted prints with the speed, cost-effectiveness, and efficiency of modern printing technology.
Despite its appearance resembling a copy machine, it's important to note that the Risograph isn't a copier but rather a duplicator.
The Risograph generates a stencil, which is applied to a rapidly spinning ink-filled drum. This high-speed rotation propels the ink through the stencil onto the paper, resulting in absorption and giving rise to a distinctive visual appeal and texture.
Nowadays the Riso inks are made from rice bran oil, and take longer to dry than conventional printing techniques.
Our Riso MZ 1070E prints two colours in one pass on A3 paper. It uses ink drums as spot colours to create 1 or 2 colour(s) duplications at high speed. More than 2 colours will require more than one pass through the machine.
Keep in mind that Riso ink is transparent, two different colours creates a third one.