Fig. 2

P.PalauRib. 460. Top left: the white frames highlight the two regions investigated (R1 and R2). Top right: visible and NIR micro-photographs (magnification: ×50) of R1. Bottom: XRF spectra of inked and non-inked spots from the two regions
P.PalauRib. 460. Top left: the white frames highlight the two regions investigated (R1 and R2). Top right: visible and NIR micro-photographs (magnification: ×50) of R1. Bottom: XRF spectra of inked and non-inked spots from the two regions