http://www.kunsthaus.ch/en/the-collection/conservation/examples-from-the-world-of-art-conservation/max-ernst/hidden-damage/hidden-damage-under-uv-light/?redirect_url=title%3DPhases

Kunsthaus Zürich

Hidden damage

Under UV light further sections could be localized and clearly distinguished from the original sections, especially the yellow ones.  Those sections with added coats of paint are clearly visible particularly within the purplish-blue and brownish-blue surfaces.  Only the light green and light blue fluorescent sections have not been painted over.
Under UV light further sections could be localized and clearly distinguished from the original sections, especially the yellow ones. Those sections with added coats of paint are clearly visible particularly within the purplish-blue and brownish-blue surfaces. Only the light green and light blue fluorescent sections have not been painted over.