Fig. 4From: Infrared chemical mapping of degradation products in cross-sections from paintings and painted objectsMicrographs of the cross-section prepared from L’Annonciation. a Incident light image. b Fluorescence image (blue excitation). The area analyzed by ATR-FTIR is shown within the red square in (a). Representative single-point spectra discussed in the text were taken from spots within the red circlesBack to article page