Risograph inks are soy-based and do not conform exactly to any color standards. The listings below are approximates for reference only. Additionally, Riso inks are also slightly transparent and allow for variations in overprint and based on the color of paper they are printed on. 

A nozzle-to-nozzle ink transfer adapter is an easy and painless method of transfering inks from tube to tube. Transfering ink in this manner is a much cleaner process then filling tubes through the back and helps prevent air bubbles from forming during the transfer process. 


To understand the role that paper plays in Risograph printing begins with a brief knowledge of ink behaviour. Soy-Based Risograph Ink dries through a combination process of absorption and evaporation, so it is ideal to find paper stocks with qualities that suit this process. Much like soy-based newspaper printing ink, Riso Inks may smudge after the prints have dried (technically, the ink never really sets). This may be of concern for some projects, especially those with heavy ink coverage, or intended for handling.

Procedure for converting the color of a Z-type drum. Steps 1 - 9 also work when machine does not recogonize a correctly installed ink tube.

There are several Risograph z-type drums, most of which are not universally compatible. Use the following charts to determine compatibility with your machine. 

North American Models

RZ 590 & 390 Compatible

MZ 790, 990 & RZ 990 Compatible but Drum Code Entry may differ

MZ790 Drum Code Entry (1210 in service mode): 69

RZ 1090 & MZ 1090 Compatible

EZ 590, 591, 390 & 391 Compatible

RZ drums are not compatible with EZ, but can be converted with special kit.