Risograph is a brand of digital duplicators manufactured by the Riso Kagaku Corporation, and was released in Japan in 1986. It was originally designed for high-volume photocopying and printing, although it has gained popularity as an alternative graphic printing method. Riso printing is an environmentally friendly and effective printing technique with a unique result, and the process can be described as a hybrid between traditional silk screen printing and modern day photo copying.
Screen printing, sometimes referred to as silk screen printing or serigraphy, is the process of pressing ink through a mesh screen, that has been coated with light sensitive paint and exposed to UV-light to create a stencil. It was popularized as an artistic method by Andy Warhol in the 1960s but is commonly used in a whole range of different industries and fits well for various foundations such as textiles, wood, plastic and of course paper.
Lithography is a planographic printing process that makes use of the immiscibility of grease and water. The process was discovered in the late 18th century and became a popular medium among artists during the mid-1800s.
In offset lithography the image is printed on a rubber cylinder that offsets (transfers) the image onto the paper.
What comes out of your everyday printer. Comes in different qualities.