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Two Coptic icons were studied, these date from the 18th century and were painted by IbrahimAl-Nasekh and are currently to be found in Saint Mercurius Church, Saint Mercurius Monastery in Old Cairo, Egypt. The analytical techniques used were Raman microscopy, optical microscopy and gas chromatography–mass spectrometry in order to determine the stratigraphy of the artworks, to identify the pigments...
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