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April 1, 2011

Laboratory replicas of watercolor brushstrokes before (below) and after (above) fading in sunlight.

Laboratory replicas of watercolor brushstrokes containing cochineal (Carmine Naccarat) and madder lakes before (below) and after (above) fading for 20 months in a sun-exposed window.

Credit: Kristi Dahm, The Art Institute of Chicago


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