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Fig. 2 | Heritage Science

Fig. 2

From: Odilon Redon’s noir drawings: characterization of materials and methods using noninvasive imaging and spectroscopies

Fig. 2

MA-XRF distribution maps of Ca-K, Fe-K, P-K, Cu-K, and Zn-K in Apparition. Scan parameters: 330 μm spot size, 350 μm step size, 8 ms dwell time 52.0 × 37.8 cm area imaged. An image showing the Ca-K/Fe-K ratio is presented on a color scale to help visualize those areas containing differing proportions of calcium and iron. The horizontal line seen exclusively in the Fe-K map is highlighted (green arrow)

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