Fig. 6From: Painting with recycled materials: on the morphology of calcite pseudomorphs as evidence of the use of wood ash residues in Baroque paintingsBSE images showing calcite pseudomorph particles, most of them with skeletal structure, found in the ground layer of Velazquez’s Portrait of a man (a–c) and Juan de Pareja (d–f), and of Villalpando’s Adoration of the Magi (g–i)Back to article page