Fig. 6
From: Silver paints in medieval manuscripts: a first molecular survey into their degradation
SEM images of the microsamples (backgrounds were removed) from the red flower bud in folio 73: B1 and B2 and its schematic depiction: in black is silver and in gray is the ground composed by chalk and gypsum. Infrared spectra, bottom left, from the ground displaying chalk (filled circle), gypsum (filled triangle) and a polysaccharide binder (filled square) compared with a reference proteinaceous (filled star) paint: 90% chalk: 10% gypsum. Bottom right, egg white and gum arabic references