Fig. 2From: Silver paints in medieval manuscripts: a first molecular survey into their degradationSchematic reconstruction of a stratigraphy of a silver sky background: over the parchment, a ground is applied that is the base for silver; on top of it, lapis lazuli is used to draw the clouds; indigo is used to shade the metal leaf. This proposal is based on the analysis of Ms Cofre no24 [4, 11]Back to article page