Seite - 279 - in The Vienna Genesis - Material analysis and conservation of a Late Antique illuminated manuscript on purple parchment

Sophie Rabitsch, Christa Hofmann, Junko Sonderegger 279 were adjusted to the size and depth of each folio. A small space was left on the lower inner corner of the frames to facilitate the opening of the tissue folders. A click system of mat- board was applied to keep the folders closed (Fig. 34). Straps of cotton ribbon (Stoffkeller) were recessed into the back side of the matboard folder, fixed with Japanese tissue and wheat starch paste. The matboard folder is then stored in a larger sink mat with a cover (Fig. 35). For this purpose, a case made of museum matboard (1.8 mm) and corrugated board (Klug, 6.4 mm) measuring 50 x 40 cm was created59. A window a bit larger than the small matboard folder was cut inside the corrugated board and the matboard. All open edges of the corru- 59 Helmut Molacek made the sink mat-cases, Institute for Conservation, Austrian National Library. Fig. 34: Matboard folder with frame and click system. Fig. 35: The passepar- tout with sink mat and cover, the matboard folder and the archival box. Open-Access-Publikation im Sinne der CC-Lizenz BY 4.0