Despite its international influence on artists, the European art establishment did not discover the work of Allan Kaprow until the beginning of the 1970s. His art was opened up to a wider public through activities which could be experienced that were initiated and put on by gallerists René Block and especially Inge Baecker and implemented with the help of museums, universities and sponsors. The sediment brochure gives insights into the close cooperation, the organisational efforts between two continents and into unpublished projects, but also shows the initial difficulties of the institutions in integrating transitory forms of art. Units of warmth and coldness is therefore not only the title of a central action, but also characterises Kaprow’s intensive and in part difficult cooperation with the art world.