Although there are not many examples of reverse glass painting in the large collections of the Pinakotheken, the Doerner Institut has for many years been participating in the research of reverse glass painting under the aspects of art technology and painting technique. The main focus was to analyze pigments and binding media. While medieval or early modern works used to be in the center of attention before, now the view widens to Classic Modernism. The related project is financed by VolkswagenStiftung.

Not only the rare and unusual technique of reverse glass painting is worth an art-technological examination, above all the serious conservation problems make action imperative. An open-minded approach to the problems of reverse glass painting, expert knowledge, source documents, accessible inventories, excellence in chemical analysis and the practical conservation work are here in an interdisciplinary research project.

Since 2015, the project is a cooperation between Museum Penzberg, Bundesanstalt für Materialforschung und -prüfung (Berlin), the free-lance conservator Simone Bretz (Garmisch-Partenkirchen) and the Doerner Institut.