... linseed oil or varnish, turns grey very fast in sunlight and white again in the dark[citation needed].] References^ Gerhard Auer ... Dieter Griebler and Marcel Liedekerke "Pigments, Inorganic, 2. White Pigments" in Ullmann's Encyclopedia of Industrial Chemistry 2009, Wiley-VCH, ... Pigments and Chemical Company produced lithopone, a widely used white paint pigment also manufactured by DuPont. But Krebs' ...