hydrolysable tannins and lead white pre-treated parchment
Morocco
Source: Oubelkacem, Y., et al. (2020). 2020 6th IEEE Congress on Information Science and Technology (CiSt), 173-177.
Recipe Details
Ingredients
animal skin, lead white, hydrolysable tannins, zinc, sulfur
Preparation Steps
This Jewish parchment scroll fragment was prepared with hydrolysable tannins (indicated by bands at 1732 cm-1 and 760 cm-1) and lead white ((2PbCO3·Pb(OH)2)). Lead white was applied as a paste to fill pores and smooth the surface. XRF also detected zinc (Zn) and sulfur (S), suggesting an intentional addition or natural occurrence in the lead ore used (p. 176).
Original Recipe Text
This Jewish parchment scroll fragment was prepared with hydrolysable tannins (indicated by bands at 1732 cm-1 and 760 cm-1) and lead white ((2PbCO3·Pb(OH)2)). Lead white was applied as a paste to fill pores and smooth the surface. XRF also detected zinc (Zn) and sulfur (S), suggesting an intentional addition or natural occurrence in the lead ore used (p. 176).
Evidence
"hydrolysable tannins and lead white have been highlighted in the Jewish one (p. 173). Lead white had been probably used to fill the pores while smoothing the irregular structures of the parchment surface; this careful treatment was reserved for luxury manuscripts (p. 176)."
Remarks
The parchment features parallel ruling lines drawn with a lead white-based paste. The pH is nonacidic (above 6), and the material is well-preserved despite collagen gelatinization (p. 176).
Scientific Analysis
Analytical Techniques
XRF
FTIR
Certainty Level
Confirmed
Instrumentally Verified
Verified
Metadata
Material Type
paper
Paper TypeParchment
RegionMorocco
Source Information
AuthorOubelkacem, Y., et al.
CollectionImperial city of Fes
Language
N/A
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