Fig. 9

µ-XRF imaging of ÆIN 1059. Optical image of the yellow area outlined in red and the white background (a). Below are shown the elemental distribution plots for Ca (b), Sr (c), Fe (d), and Pb (e). It should be noted that image (e) for Pb is mapping the X-ray intensity at 10.50 keV, which is formed by an almost complete overlap of the As K-alpha and Pb L-alpha lines. Image (e) is therefore a mix of As and Pb. According to our assessment, the pigment contains more Pb than As, wherefore image (e) has been given the designator “Pb”