Fig. 7From: Charcoal or black stone? Reconstructions as a tool to study the behaviour of dry underdrawing materials within the paint structure of sixteenth century panel paintings©HPM, HERCULES Lab—U. Évora, PortugalDetails of drawing made with the modern dry media under study over an untreated gesso ground, viewed under the binocular microscope with × 1.25 (left) and × 6.3 (right) magnifications. All images Back to article page