Diagnosing `art acne` in Georgia O`Keeffe`s paintings
(PHYSorg.com Chemistry)

Even Georgia O`Keeffe noticed the pin-sized blisters bubbling on the surface of her paintings. For decades, conservationists and scholars assumed these tiny protrusions were grains of sand, kicked up from the New Mexico desert where O`Keeffe lived and worked. But as the protrusions began to grow, spread and eventually flake off, people shifted from curious to concerned.