Fig. 6From: Assessing the decorative techniques of two Art Nouveau glass windows by optical coherence tomography (OCT)a Detail of the decorative frame in the right panel in the Dining Room window (Spot 18). OCT tomograms: b Tomogram 48, in horizontal analysis, showing the morphology of the altered thick grisaille; c Tomogram 75, in vertical analysis, showing the difference between the area in which the grisaille has been detached and the thick cracked grisaille. Solid line: thick altered grisaille; Dotted line: thin grisaille. The tomograms have the same scaleBack to article page