Seite - 342 - in The Vienna Genesis - Material analysis and conservation of a Late Antique illuminated manuscript on purple parchment

342 Authors and co-authors Christa Hofmann Christa Hofmann graduated from the conservation program of the Academy of Fine Arts in Vienna specialising in paper conservation. She received further training in conserva- tion of photographic materials during internships in the USA and France. She has been working as paper and photo conservator at the Austrian National Library. In 2003 she was appointed head of conservation. Topics of research have included bleaching methods of paper, transparent papers, matt albumen prints, iron gall inks and green copper pigments. Contact: Christa Hofmann, Institute of Conservation, Austrian National Library, Josef- splatz 1, 1015 Vienna, Austria T: +43 1 53 410-322. E: christa.hofmann@onb.ac.at Klaudia Hradil Dr. Klaudia Hradil received her PhD in crystallography from LMU Universität München, Germany. She then worked at different large-scale neutron facilities (Helmholtz Zentrum Berlin, Heinz Maier-Leibnitz Zentrum Garching) in instrument development to investi- gate time and space dependent structural properties of materials and, subsequently, served as the head of the central laboratory for investigation of structural properties at the X-ray center of the TU Wien. Her main scientific interests are within the investigation of struc- tural properties of materials. Contact: Dr. Klaudia Hradil, Head X-ray center, Vienna University of Technology, Get- reidemarkt 9, 1060 Vienna, Austria T: +43 1 58801 406620 E: klaudia.hradil@tuwien.ac.at Inge Boesken Kanold Inge Boesken Kanold is an artist with a special interest in ancient and forgotten colours. She began research on colours during her 14-year stay in Asia during the seventies. Since 1982, she has lived and worked in Lacoste, Provence. The local fish markets provide her with the sea-snails from the Mediterranean which are necessary for her art-work with purple. In January 2001, together with John Edmonds, she succeeded in reconstructing a fermentation vat using fresh H. (Murex) trunculus. She continued with research on a related subject: the purple parchment. In 2005, twenty-six years after the first attempt, she obtained the purple pigment she was looking for. Using oil or egg yolk modifies the purple hue to a greyish blue. As an artist, she always wanted to show what the real purple colour looks like by choosing it as the main theme of her work. Contact: Inge Boesken Kanold, Chemin du Château, 84480 Lacoste, France T: +33 652564386, E: ingebkanold@free.fr website:http://pourpre.inge.free.fr Open-Access-Publikation im Sinne der CC-Lizenz BY 4.0