Fig. 7From: Hidden library: visualizing fragments of medieval manuscripts in early-modern bookbindings with mobile macro-XRF scannerTentative color reconstruction of case study 3 (617 F 19). Signals of Hg (red), Fe (brown) and Cu (blue) are combined on a white background. Color values and ratios were attributed manually with image processing software. On the left is the far edge of the corresponding fragmentBack to article page