Fig. 3From: 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-titanium white paint-outs (Set 2). a Pseudo-absorbance spectra showing the range of mass % smalt as labeled and b peak height of cobalt K-alpha line from XRF spectra (Rh excitation). Inset shows a photograph of selected paint-outsBack to article page