Page - 250 - in The Vienna Genesis - Material analysis and conservation of a Late Antique illuminated manuscript on purple parchment

250 Conservation of the Vienna Genesis and the new storage system The parchment of the folios shows planar distor- tions (Fig. 4), while mechanical deformation can be observed especially in the text area. On some folios additional small, parallel, horizontal undulations are noticeable. Due to the mounting between acrylic sheets these distortions were not very pronounced and they remained so after opening the mounts. An- other phenomenon is the presence of dark, parallel, horizontal stripes on many folios (Fig. 5). They only occur in the areas above, below or within the text area. The parchment does not seem to be thicker in these areas and the stripes are not visible in trans- mitted light. They can be felt as shallow grooves and might originate from burnishing the parchment be- fore writing. Fig. 3: Brownish discolouration on the edge of folio 11, page 21. Fig. 4: Planar distortions on folio 24. Open-Access-Publikation im Sinne der CC-Lizenz BY 4.0