Fig. 9

a) Infrared spectra acquired from pink vestments in the illuminations on folios 59 and 21, and three folios from Évora, namely, folios 16, 17 and 40v; b) detail of the polysaccharide bands and additives’ characteristic signals in the 1300–650 cm⁻¹ region. The main bands detected are assigned to gypsum (●), calcium carbonate (▪), and lead white (▲). Matching polysaccharide bands among spectra shown in a) are marked in b) with yellow strips