Fig. 2: Portrait of a 39-Year-Old Woman.
From: Two Rembrandt portraits in focus: assessing a potential relationship

Elemental distribution maps obtained by XRF mapping: Pb Lα (b), Pb M (c), Ca K (d), P K (e), Cu K (f), Fe K (g), Mn K (h), K K (i), Hg L (j), Zn K (k), and Ti K (l). In b, the arrows indicate adjustments that resulted in the repositioning of the sitter’s right arm, the reduction of the collar size, and the reworking of the left arm. Note that the contrast of the Cu K distribution map (f) has been adjusted to enhance the visibility of details.