Page - 194 - in The Vienna Genesis - Material analysis and conservation of a Late Antique illuminated manuscript on purple parchment

194 Alteration study of silver inks on parchment Like the samples of the parchment type LP, samples of the parchment type MP showed a large amount of undamaged fibres. Those fibres which indicated a damage of the collagen structure were present in form of “pearls on a string” and “bundles”. In particular the small amount of undamaged fibres that could be observed in the case of parchment LP and MP suggested a less progressed degradation of the collagen structure Fig. 38: HIROX images (taken at 150x magnification, scale bar 500 µm) of the most frequently observed fibre morphology of reference parchment LP after 13 days of artificially ageing. Fig. 39: HIROX images (taken at 150x magnification, scale bar 500 µm) of the most frequently ob- served fibre morphologies of folio 9 of the Vienna Genesis (Vienna Genesis_S2). Open-Access-Publikation im Sinne der CC-Lizenz BY 4.0