CM: "One of the personal friends and art collector of my father [Michael Berke] was Hans Kemper. He was the owner of a company making all kind of colors and fillers mainly for the automotive industry here in Cologne (the company still exists and is now led by his son). Since the 1950s this company started to develop acrylic and other plastic colors and filler paste, and Kemper quite often visited Berke and gave him these new colors for trials and evaluation. Berke liked these new materials very much, because – unlike oil color – this material dried very quickly without shrinkage like tempera. Since this new color was manufactrured by his friend, Kemper, Berke called it "Kempera". At about 1950 he started to use kempera, mainly on wood panels or on thick carton. All these paintings are characterised by kempera’s very thick plastic color paste like relief. The present piece in the ACG Art Collection, dated 1952, is a typical artwork, which must have been sold or donated after the death of my father (1979), because it contains the heritage stamp which my mother used to identify the all paintings of our father. It is entitled "Tanz" which means dance, and if viewers look closely they may identify at least two abstract figures. I still have a series of these mostly abstract reliefs, all made with kempera."