http://www.kunsthaus.ch/en/the-collection/conservation/examples-from-the-world-of-art-conservation/egon-schiele/fig4/?redirect_url=title%3DMethodologie

Kunsthaus Zürich

Egon Schiele

Detail of the rear of the canvas: owing to the thick wax compound, the structure of the canvas can no longer be discerned.
Detail of the rear of the canvas: owing to the thick wax compound, the structure of the canvas can no longer be discerned.