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Maurizio Aceto, Maria João Melo, Elisa Calà , Paula Nabais, Rita Araújo 105
the purple colour of the parchment. The following analysis enabled the production of a
fingerprint identification of the dye.
For the study, four techniques were selected. UV-visible diffuse reflectance spectropho-
tometry with optic fibres (FORS) was used for the preliminary identification of the dye.
Spectrofluorimetry yielded complementary information. Micro-spectrofluorimetry on
aged reference samples and on original parchment micro-samples enabled further insight
Table 1b: Possible sources for purple
dyeing in antiquity and
molecular structures for
the main chromophores:
Chrozophora tinctoria and
shellfish purple (Hexaplex
trunculus). Dyed parchment
samples were irradiated
with a Xenon lamp (lirr ≥
320 nm), photographs and
L*a*b* colour coordinates for
unaged and 310 h irradiation
are given.
Fig. 1: Structure of dibromoin-
digotine.
Open-Access-Publikation im Sinne der CC-Lizenz BY 4.0
The Vienna Genesis
Material analysis and conservation of a Late Antique illuminated manuscript on purple parchment
- Title
- The Vienna Genesis
- Subtitle
- Material analysis and conservation of a Late Antique illuminated manuscript on purple parchment
- Editor
- Christa Hofmann
- Publisher
- Böhlau Verlag
- Location
- Wien
- Date
- 2020
- Language
- English
- License
- CC BY 4.0
- ISBN
- 978-3-205-21058-0
- Size
- 17.3 x 24.5 cm
- Pages
- 348