Spanish mediaeval frescoes at Basconcillos del Tozo: a Fourier transform Raman spectroscopic study

摘要: The late mediaeval frescoes in the Church of SS Cosmo and Damian at Basconcillos del Tozo, Castille y Leon, Spain, were studied using Fourier transform Raman spectroscopy. paintings only discovered about 3 years ago afforded a rare opportunity for spectroscopic analysis pigments substrata which have not been subjected to cleaning or re-touching over last 600 years. Although polychrome palette, most common reds, followed by black, yellow blue; 20 samples taken analysis. red identified spectroscopically hierarchical application is evident, with pure cinnabar being used important biblical figures. There evidence two hydrated calcium oxalate, probably arising from lichen colonization, but it possible infer whether this pre- post-mural painting. substrate shows no presence gypsum plaster. difference between associated mixtures ochre figures also organic coloured resins background. some inclusion lead lower panels. Copyright © 1999 John Wiley & Sons, Ltd.