Fig. 4

High-resolution MA-XRF maps (0.1 mm/pixel) of a detail (240 × 24 mm) of the face of the Girl. a Visible light image, and corresponding MA-XRF maps: b copper, c iron, d lead, e mercury, and f overlay of copper (green) and mercury (pink). There is a gap between the paint layers of the background (Cu-containing) and the paint layers of her face (Hg-containing) that is rich in iron. g The 3D digital micrograph shows the brown, iron-rich sketch paint (region 2) showing through at the contour around her face. The area shown in g is represented by a white box in a