Cheap paint turns Van’s paintings white

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NEW YORK: The vivid reds in Vincent van Gogh’s paintings are slowly fading to white because of a pigment in his oils.
Chemical analysis of Van Gogh’s 1889 painting Wheat Stack Under a Cloudy Sky suggests that exposure to light is degrading the bright red paint that colours some of the leaves floating in a pond.
Unlike wealthier contemporaries such as Monet and Renoir, Van Gogh is thought to have used unstable pigments in his art for “reasons of cost”, as he wrote in a letter to his brother, Theo.
Koen Janssens and colleagues at the University of Antwerp in Belgium found.