Figure 11From: A multidisciplinary approach to the investigation of “La Caverna dell’Antimateria” (1958–1959) by Pinot GallizioFORS spectra of an ochre red area (A) and of a brilliant red area (B). The former shows the absorption bands of an iron oxides based pigment, the latter an “S”-shape absorption band due to the presence of PR3 pigment.Back to article page