Colour, transparency and layering, are important for Edgar Knoop (1936) as well. He was professor of applied colour theory at the academy of fine arts in Munich till 2000. At DRAW we show his ‘Horizontes’, collages of torn cardboard on paper in unexpectedly daring colours. The works arise from a combination of the accident of the tearing of crimped cardboard and the precision and control of the pasting of these clips to each other. In this work colour is used as a substance.