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Heritage Science
Fig. 14 | Heritage Science

Fig. 14

From: Colour identification, degradation processes and findings in a fifteenth-century Book of Hours: the case study of Cofre n.º 31 from Mafra National Palace

Fig. 14

On top, flower constructed with silver, gold, lapis lazuli over a ground of calcium carbonate, f.91r: a image (16×); b µ-EDXRF spectrum of a spot of the flower showing peaks of Ag, Au, Ca, S and other elements (many from the parchment); on bottom: µ-Raman spectra of silver degradation in the windowpanes of the Annunciation (f.25r), c suggesting silver sulphide (Ag2S), d evidencing the presence of indigo (analysed points indicated by the white arrow)

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