Fig. 3From: Salvator Mundi: an investigation of the painting’s materials and techniquesCross-section sample 1 from flesh highlight, proper right hand (left), showing: (1) ground (2) imprimitura (3) black background paint layer (4) flesh highlight paint layers; backscattered electron (SEM-BSE) image (right) corresponding to area with overlaid box, showing coarse glass particles in the lead white matrix of the ground and imprimitura, as well as the upper paint layers (3–4)Back to article page