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Fig. 4 | Heritage Science

Fig. 4

From: Visualising iron gall ink underdrawings in sixteenth century paintings in-situ by micro-XRF scanning (MA-XRF) and LED-excited IRR (LEDE-IRR)

Fig. 4

H. Holbein the Elder “Tree of Jesse” (Inv. No. HM 6). Top row, left to right: Visible light image of King David’s harp in greyscale with a mapping of underdrawing lines either visible (blue) or invisible (green) at 1550 nm, LEDE-IRR at 1060 nm and 1550 nm. Second row, left to right: MA-XRF element maps of Fe-K, Cu-K and Zn-K. Bottom rows, left to right: Mapping and plots of the correlation of Fe-K/Mn-K, Fe-K/Cu-K and Fe-K/ Zn-K. ©Städel Museum, Frankfurt am Main, Department for Art-Technology and Conservation of Paintings and Modern Sculpture, M. Gerken

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