Title : OCT Scans Reveal Painting Layers
link : OCT Scans Reveal Painting Layers
OCT Scans Reveal Painting Layers
OCT scanning is a non-invasive technique used by conservators for analyzing the surface layers of a painting.
OCT stands for optical coherence tomography, and it reveals a cross section of the top layers so they can distinguish yellowing varnish layers from pigment layers.
The National Gallery's Kristina Mandy demonstrates the technique in this YouTube video.
Wikipedia on optical coherence tomography
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