Emily Kristin Müller. Darkened lead white conversion: effect of hydrogen peroxide on the substrate. Lead white is known to discolor under the influence of environmental sulfuric gases. The discolored, often greyish, brownish, pinkish or orange product of this process is lead sulfide. Side effects of treatment of early treatments can be observed on drawings. The study examines historic methods and modern treatment options of converting lead sulfide into lead sulfate to compare their effectiveness and their side effects also long-term. Methods investigated include such as gaseous application in ether or aqueous solution and methylcellulose as carrier.
In collaboration with the Museum of Prints and Drawings, National Museums at Berlin; University of Natural Resources and Life Sciences, Vienna; the Indianapolis Museum of Art Conservation Science facility.