Fig. 5
From: Silver paints in medieval manuscripts: a first molecular survey into their degradation
Molecular identification of the blue acanthus leaf. The blue colour is obtained layering lapis lazuli (a) over azurite (b). The pink outline (c) is made with chalk (filled circle), gypsum (filled triangle), protein (filled star) and polysaccharide binder (filled square). The emission and excitation spectra (d) (black line) matches those of recipes 9 and 27 for brazilwood lake pigment from The book how to make colours (gray and dashed lines) [53]