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Fig. 7 | Heritage Science

Fig. 7

From: A transparent dialogue between iconography and chemical characterisation: a set of foreign stained glasses in Portugal

Fig. 7

EDXRF spectra of the two types of grisailles (representative spectra were chosen from Saint Gregory—SG—panel) compared with the spectrum of a Nuremberg Schwarzlot painting on hollow glass signed with the monogram of Johann Schapper, also in Ferdinand II’s collection. Values normalised between lighter and darker grisaille by the Ca peak, whilst the whole spectra is normalised to the maximum peak, in the present case being the Cu peak

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