View source for File:19-32 Canada.Balsam2 glass.jpg

Canada Balsam

Normal (left) and UV (right) reflected light images of Canada Balsam on a glass slide over a black background to illustrate the color of the substance along with presence or absence of autofluorescence. Normal light = Halogen lamp (100 W, no filter); UV light=Mercury gas discharge lamp (100W, excitation filter=340-380nm, suppression filter=425 nm). Image credit: Scientific Research lab, Museum of Fine Arts, Boston



Sample from the [http://www.artmuseums.harvard.edu/straus/special.html Gettens Collection of Aged Pigments and Media], Straus Center for Conservation, Harvard University Art Museums.