Screen Panel (2010.6.26): This glass rod panel is made up of two rectangular sheets of assembled thin glass rods with painted paper cutouts sandwiched between them and held together at the edges with paper tape. Years of gathering dirt left the panel filthy. Most of the 28½-hour treatment was spent on cleaning the glass surfaces with cotton balls dampened with saliva and a water/ethanol mixture. Saliva is often used in conservation because it has enzymes which help dissolve and pick up dirt. Because of its viscosity, saliva also wets the object less than more fluid solvents like water. Read more about this object in a previous blog post. Transfer from The Rakow Library.