They are close to the basic current of constructivist art at the beginning of the 20th century, the advance into non-objectivity. These can be described with the keywords "emotional - sensual - rational", to which the expressive, the organic and the constructive correspond as pictorial-formal possibilities. The influence of the Bauhaus with Johannes Itten, Josef Albers and Moholy-Nagy as well as Max Bill in Zurich with the legendary exhibition of 1960 "Concrete Art. Fifty years of development." are also the inspiration here. Due to the situation in Germany in the post-war period, the constructive ideas experienced a revival. This was also the case in the theoretical writings of Max Bense in ...