Figure 8 | Scientific Reports

Figure 8

From: Imaging and micro-invasive analyses of black stains on the passepartout of Codex Atlanticus Folio 843 by Leonardo da Vinci

Figure 8

(a) HR-XRD spectra patterns of the white (grey) and dark (black) regions (radiation wavelength 0.35430407 Å). Squares and diamonds highlight the peaks related to cellulose and β-HgS respectively. (b) Visible light photograph of the area of the dark sample where SR µXRD mapping was performed. (c) SR µXRD images calculated by integrating XRD intensity over ROIs of XRD pattern, shown as green and purple rectangles in (a) for cellulose and metacinnabar respectively.

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