Fig. 6 | Heritage Science

Fig. 6

From: 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

Fig. 6

©HPM, HERCULES Lab—U. Évora, Portugal

Cross sections of reconstructions with charcoal underdrawing viewed at different magnifications in the optical microscope under incident light (OM-Vis) and ultraviolet radiation (OM-UV). a Ground covered with a cold-pressed oil isolation layer: penetration of the oil is clearly visible. b Ground first sealed with animal glue and then covered with cold-pressed linseed oil isolation layer: no oil penetration into the gesso is evident. See Additional file 1 for information on the materials used. All images

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