Fig. 4
From: Artificial orpiment, a new pigment in Rembrandt’s palette
Paint cross-section from the black belt of Isaac that is painted over the yellow sleeve. First row sample location (X) and light microscopic images, bright field (BF) and ultraviolet (UV), photographed at ×500 magnification. Second row SEM backscattered-electron (BSE) and bright field (BF) images, zooms corresponding to rectangle in ×500 BF image of first row, yellow arrows point to ball-shaped, bright yellow particles. Third row BSE and corresponding EDX maps of As, S, Fe, Sn, Pb, same region as LM images of first row, and EDX spectrum of ball-shaped, bright yellow particle showing As and S