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Behind the Scenes in Conservation: Our paintings conservator has been cleaning this self-portrait by Martin Quadal (1736-1808) under the watchful eye of the artist’s canine companion. Chalk marks around the artist’s face seem to have captured the dog’s attention. They’re used to mark areas of variable fluorescence that only show under ultraviolet light. They’re harmless and easily removed during varnish removal. Down boy!
Detail, Marting Quadal (b.1736, d. 1808); Self Protrait, 1788; oil on canvas; Bequest of Walter I. Farmer; 1997.118