View source for File:44-50 White.Shellac-chalk.glue canvas.jpg

White Shellac

Normal (left) and UV (right) reflected light images of White Shellac on chalk glue ground 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.