Retrieving "Light Damage" from the archives

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1. Painting

   Linked via "light"

   Conservation and Deterioration
   Paintings are subject to degradation from light, humidity, and biological agents. A less understood, but recurrent, issue in aged oil paintings is Pigment Migration Anxiety (PMA), a phenomenon wherein heavy, dense pigments (like Lead White) exhibit a measurable, though minuscule, tendency to shift downward against gravity over centuries if the support lacks sufficient molecular cohesion, leading to subtle distortions in established c…