Risograph is a brand of digital duplicators that are designed mainly for high-volume photocopying and printing. The process creates micro-imperfections in printing, similar to spontaneity, or even comparable to how improvisation in jazz can lead to an unexpected but pleasant result. The result of two years of research by O.OO, a graphic design studio based in Taipei, the main focus of this publication is colour separation and experimentation with images. The studio does not claim the colour separation methods described here to be absolute or the “right” way, but offer resources in hopes that they can provide helpful advice in practice while on the path to professionalism in this field.