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80 Purple dyeing of parchment
Three batches were prepared from Lasallia pustulata. Two of them resulted in a vibrant
purple colour, while the third did not turn purple but stayed brownish. The batches were
prepared on 19 July 2016, 03 November 2016 and 12 May 2017. Lasallia pustulata de-
veloped the dye in about three weeks. The pH value of the undiluted dye was between 9.77
and 11.26. The pH value of the diluted dye was at 10.31.
Application
As there is not much surviving knowledge about the historical methods of dyeing parch-
ment, two different methods of application were tried:
1. application with a tool like a brush and a cotton swab
2. immersion of the parchment into a dye bath
A further method is the application with a cloth, soaked in dyestuff. Parchment is
placed between two of those cloths and pressed82. This procedure seems to leave marks on
82 Denoël et al., 2018, p. 9. Fig. 3: The application of the
dye with a brush gave
uneven results: a) flesh
side, b) hair side, c) flesh
side, d) hair side.
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