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Heritage Science
Fig. 10 | Heritage Science

Fig. 10

From: In-situ multi-analytical characterization of original and decay materials from unique wall mirrors in the House of Gilded Cupids, Pompeii

Fig. 10

a LIBS spectra in the NIR wavelength region (600–1000 nm) collected from a white crust on Mirror 1, analysing 14 times on the same spot, showing the detail of the sulphur emission band. b, c Graphs (after excluding outliers) showing how the intensity of the two main nitrogen emission lines at 867.7 and 821.6 nm decreases as a function of the number of laser shots till a nearly constant value

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