Seite - 191 - in The Vienna Genesis - Material analysis and conservation of a Late Antique illuminated manuscript on purple parchment
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Sophie Rabitsch, Antonia Malissa, Katharina Uhlir, Martina Griesser, Christa Hofmann 191
Table 4: Mean values for the temperatures of the first observed shrinkage activity (Tfirst), the shrinkage
temperatures (TS), the temperature at the end of the main shrinkage interval (TS, end), the length
of the main shrinkage interval (ΔT), the temperature of the last observed shrinkage activity
(Tlast) and the length of the entire shrinkage interval (ΔTcomplete) of polished and unpolished
reference samples of the first part of the ageing study after five days of artificial ageing.
Sample Tfirst [°C] TS [°C] TS, end [°C] ΔT [°C] Tlast [°C] ΔTcomplete [°C]
ST1B/NP/up/5d 37,8 ± 0,3 40,2 ± 0,8 43,4 ± 0,0 3,2 47,0 ± 0,9 9,2
ST1B/NP/p/5d 37,7 ± 0,6 39,2 ± 0,9 42,8 ± 1,2 3,6 47,1 ± 1,0 9,4
ST2B/NP/up/5d 37,9 ± 0,7 41,1 ± 0,5 43,7 ± 0,6 2,6 46,8 ± 0,4 8,9
ST2B/NP/p/5d 35,8 ± 0,7 40,5 ± 0,7 43,5 ± 3,0 3,0 46,6 ± 0,6 10,8
ST3B/NP/up/5d 37,2 ± 1,7 40,0 ± 0,9 42,5 ± 1,3 2,5 49,1 ± 2,0 11,9
ST3B/NP/p/5d 35,3 ± 0,7 40,0 ± 0,1 42,7 ± 0,5 2,7 53,7 ± 2,5 18,4
ST4B/NP/up/5d 35,6 ± 0,6 38,5 ± 1,1 42,9 ± 3,6 4,4 47,2 ± 2,1 11,6
ST4B/NP/p/5d 34,4 ± 1,6 39,2 ± 1,6 42,4 ± 0,5 3,2 49,8 ± 1,7 15,4
ST1B/LP/up/5d 41,9 ± 0,1 43,9 ± 0,1 47,3 ± 0,4 3,4 50,9 ± 1,8 9,0
ST1B/LP/p/5d 42,0 ± 0,6 44,0 ± 0,1 46,7 ± 0,2 2,7 49,0 ± 1,2 7,0
ST2B/LP/up/5d 43,1 ± 0,7 44,4 ± 0,4 46,9 ± 0,4 2,5 51,3 ± 1,8 8,2
ST2B/LP/p/5d 39,0 ± 0,3 42,5 ± 0,4 46,9 ± 0,6 4,4 51,2 ± 1,6 12,2
ST3B/LP/up/5d 42,8 ± 0,5 44,7 ± 0,2 47,9 ± 0,8 3,2 55,3 ± 3,6 12,5
ST3B/LP/p/5d 41,8 ± 0,4 44,2 ± 0,5 47,5 ± 0,3 3,3 56,1 ± 3,4 14,3
ST4B/LP/up/5d 43,7 ± 2,0 45,4 ± 1,4 47,2 ± 0,8 1,8 53,0 ± 1,3 9,7
ST4B/LP/p/5d 43,0 ± 1,7 44,9 ± 0,3 47,2 ± 0,6 2,3 52,0 ± 1,2 9,0
Along with the discussed decrease of the shrinkage temperatures of the artificially aged
samples, a reduction of the possible five shrinkage intervals – A1, B1, C, B2 and A2 – could
be observed. The reference samples, which were made of the parchment types NP and LP
and aged during the first series of the ageing study, only showed three shrinkage intervals
– A1, C and A2 – after 13 days of artificial ageing. In contrast, the reference samples, which
were made of the parchment type MP and aged during the second part of the ageing study,
still showed all five shrinkage intervals.
As it was described above, one half of each reference sample was burnished with an
agate polishing stone prior to the application of the silver inks in the course of sub study
1 with the purpose of checking if this mechanical preparation step had an impact on the
condition of the parchment after ageing. As it can be seen in Table 4, the shrinkage tem-
peratures of unburnished and burnished samples only vary between 38.5 °C and 41.1 °C
for samples of the reference parchments NP and between 42.5 °C and 44.9 °C for samples
of the reference parchments LP. Since these minor variations are in accordance with the
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
- Titel
- The Vienna Genesis
- Untertitel
- Material analysis and conservation of a Late Antique illuminated manuscript on purple parchment
- Herausgeber
- Christa Hofmann
- Verlag
- Böhlau Verlag
- Ort
- Wien
- Datum
- 2020
- Sprache
- englisch
- Lizenz
- CC BY 4.0
- ISBN
- 978-3-205-21058-0
- Abmessungen
- 17.3 x 24.5 cm
- Seiten
- 348