condensed tannins pre-treated parchment
Morocco
9th Century
Source: Oubelkacem, Y., et al. (2020). 2020 6th IEEE Congress on Information Science and Technology (CiSt), 173-177.
Recipe Details
Ingredients
animal skin, lime, sodium chloride, condensed tannins
Preparation Steps
The parchment was prepared using animal skins treated with a lime bath (CaO, CaCO3, Ca(OH)2) and likely a sodium chloride bath. The surface was pre-treated with condensed tannins, as suggested by the weak shoulders at 1715 cm-1 and 1280 cm-1 in the ATR-FTIR spectra (p. 176).
Original Recipe Text
The parchment was prepared using animal skins treated with a lime bath (CaO, CaCO3, Ca(OH)2) and likely a sodium chloride bath. The surface was pre-treated with condensed tannins, as suggested by the weak shoulders at 1715 cm-1 and 1280 cm-1 in the ATR-FTIR spectra (p. 176).
Evidence
"the Islamic parchments seem to be condensed tannins pre-treated... Chlorine may be due to the use of sodium chloride bath and calcium relates to the use of lime (CaO, CaCO3, Ca(OH)2), while preparing skins and then parchments (p. 173, 176)."
Remarks
Parchment alterations such as collagen gelatinization and molecular helix disorder were observed. Manuscript MEK-MS-7LP showed a more acidic pH (4.75-5.75) compared to MEK-MS-6LP (pH > 6), possibly due to higher chlorine content (p. 176).
Scientific Analysis
Analytical Techniques
XRF
FTIR
pH measurement
Certainty Level
Confirmed
Instrumentally Verified
Verified
Metadata
Material Type
paper
Paper TypeParchment
RegionMorocco
Approx. Year850
Source Information
AuthorOubelkacem, Y., et al.
CollectionGreat mosque of the imperial city of Meknes
Language
N/A
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