Fig. 2From: Use of standard analytical tools to detect small amounts of smalt in the presence of ultramarine as observed in 15th-century Venetian illuminated manuscriptsUltramarine-smalt paint-outs (Set 1). a Pseudo-absorbance spectra showing the range of mass % smalt as labeled, b XRF spectra from selected paint-outs (Rh excitation), and c peak height of cobalt K-alpha line from XRF spectra. Inset shows a photograph of selected paint-outsBack to article page