| http://www.w3.org/ns/prov#value | - When possible, the conservator uses all methods available, including polarized-light microscopy (PLM), X-ray fluorescence (XRF), Scanning Electron Microscope (SEM), Raman spectroscopy, gas chromatography/mass spectroscopy (GC/MS) and X-ray diffraction (XRD) to look at a work of art from multiple viewpoints.
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