http://www.kunsthaus.ch/en/the-collection/conservation/examples-from-the-world-of-art-conservation/max-ernst/preliminary-research/preliminary-research-cross-section/

Kunsthaus Zürich

Preliminary research

Cross section of the layers of paint of Panel 16 The two lowest layers are probably part of the painting’s ground. Clearly visible above are the original coats of paint with two layers of yellow and blue. The top grayish-blue layers are not original. Above these, but not easily visible, is a coat of non-original varnish.
Cross section of the layers of paint of Panel 16
The two lowest layers are probably part of the painting’s ground. Clearly visible above are the original coats of paint with two layers of yellow and blue. The top grayish-blue layers are not original. Above these, but not easily visible, is a coat of non-original varnish.