Fig. 4From: A combination of invasive and non-invasive techniques for the study of the palette and painting structure of a copy of Raphael's Transfiguration of ChristIdentification of pigments in the RF-5 sample. Blue color. a Microphotograph of the cross section under visible light; b Elemental distribution EDX map; c SEM–EDX spectrum from the black box area; d Raman spectrum from the black particleBack to article page