Repeat: Dr Koen Janssens, a chemist at the University of Antwerp, said their findings may explain why other paintings by Van Gogh, such as the priceless Sunflowers and The Bedroom, have faded over time.
Dr Koen Janssens, a chemist at the University of Antwerp, said their findings may explain why other paintings by Van Gogh, such as the priceless Sunflowers and The Bedroom, have faded over time.