Such contact was vital while Werkman was building up his business and could not leave Groningen. In 1929 he was able to visit Cologne and Paris, after which he developed a new printing method, applying the ink roller directly to the paper and then stamping to achieve unique effects on a simple handpress. The more complex of these required some fifty handlings in and out of the press and could take a whole day to complete. Another of his experimental techniques was the painstaking production of abstract designs using the typewriter, which he called "tiksels". After 1929 he also began writing rhythmic sound poems.