In the 1960s, Reinier Lucassen, together with painters Roger Raveel and Alphons Freymuth, was one of the most important representatives of the so-called Nieuwe Figuratie. In his work he seeks a synthesis between figuration and abstraction, between reason and an emotional expressionist way of painting. Thereby the emotional content of a work is of vital importance to him. From the 1980s, Lucassen developed a completely abstract design language. The sizes of his paintings are getting smaller, the colors sober. Typical for the painter is that he integrates characters and numbers into his paintings and sometimes gives them poetic or enigmatic titles.