gypsum, natural bi-hydrated sulphate of calcium (CaSO4–2H2O)
Ethiopia
17th Century
Source: Wion, A. (2004). An Analysis of 17th-century Ethiopian Pigments. In: Christian Ethiopian Art.
Recipe Details
Ingredients
gypsum
Preparation Steps
Applied as the ground layer to receive colours. It does not lie directly on the primary support but is applied to a thin surface of yellow-white material that acts as an interlayer (p. 108).
Original Recipe Text
Applied as the ground layer to receive colours. It does not lie directly on the primary support but is applied to a thin surface of yellow-white material that acts as an interlayer (p. 108).
Evidence
"The ground layer, the layer that will receive the colours, was identified as gypsum, a natural bi-hydrated sulphate of calcium (CaSo4–2–H2O)."
Remarks
The study differentiated this ground layer from the overlying paint layer of anhydrite (p. 108).
Scientific Analysis
Chemical CompositionCaSO4–2H2O
Analytical Techniques
Raman microspectrometry
Certainty Level
Confirmed
Instrumentally Verified
Verified
Metadata
Material Type
pigment
ColorWhite
RegionEthiopia
Approx. Year1650
Source Information
AuthorWion, A.
CollectionAbbä Antonios mural paintings
Language
N/A
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