Antoine Pevsner,Portrait of Marcel Duchamp, 1926. Cellulose nitrate on copper with iron, 65.4 x 94.0 cm (25 3/4 x 37 in.) Yale University Art Gallery. Gift of Collection Société Anonyme. The works originally clear plastic components now show extreme signs of degradation, including warping, cracking, and discoloration, which exacerbated corrosion … [Read more...]