Fig. 6From: Reflectance imaging spectroscopy and synchrotron radiation X-ray fluorescence mapping used in a technical study of The Blue Room by Pablo Picasso a Red particles are visible scattered throughout layers 1 (light blue) and 2 (dark blue) of sample X7. Micro-Raman spectra for b the dark blue and c light blue paint layers of sample X7 identify these red particles as the red pigment vermilionBack to article page