Museum of Fine Arts, Boston
Andy Warhol — still, 27 years after his death, the reigning genius of the zeitgeist — perfected the art of insult as homage — or homage as insult, whichever you please. This work, which hangs in the Art of the Americas Wing at the Museum of Fine Arts, is a dramatic example.
It’s called “Oxidation Painting,” and it’s from a series Warhol made in the late 1970s colloquially referred to as the “Piss Paintings.” Basically, Warhol invited friends and acquaintances to urinate on canvases he had prepared with metallic and acrylic paints. The uric acid in the splashing urine reacted with the copper in the painted grounds, forming deposits of mineral salts that evolved at different rates,
Article source: http://www.bostonglobe.com/arts/theater-art/2015/01/13/frame/4OpbN6KtkEMxFAoFgwd1zM/story.html