Materials
Wood panel. Although the
back of the panel has been thinned in a previous restoration
to correct a warp in the poplar planks, the original intent
of the panel maker is still obvious. The whole panel is
made up of a number of fairly rough planks, vertically oriented,
held together by (replacement) battens nailed and glued
around the perimeter and across the back of the planks.
Gaps between planks contain a heavy putty, a replacement
for a previous fill material that has mostly fallen away.
Panel preparation: The
panel was prepared by first gluing a mat of hemp fibres
to the wood and then covering these with multiple layers
of ground. Above the ground layers, the artist applied
an oil priming layer and then the paint, both oil and
egg tempera.
Pigments: Pigment, medium
analyses, and cross sections were carried out by the Analytical
Research Laboratory of CCI. The pigments and ground identified
were all known and used by 16th-century artists.
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