Fig. 16From: Colour identification, degradation processes and findings in a fifteenth-century Book of Hours: the case study of Cofre n.º 31 from Mafra National PalaceExamples of minium and vermilion degradation: a flower, f.91r, b three-leaf flower, f.91r (×40), c strawberry, f.25r; d minium degradation of purple flower on the recto of f.45vBack to article page