White seashell
Yemen
20th Century
Source: A. Regourd & K. Scheper, Shifting sands of writing inks in Yemen, CmY 7 (Juillet 2018)
Recipe Details
Ingredients
Ca, S, K, Fe, Cu, Zn, Sr, Cl
Preparation Steps
The blotting material consists of white powder derived from ground seashells. It was applied directly to fresh brown ink annotations. The process of blotting caused the ink to transfer into the powder layer (p. 183).
Original Recipe Text
The blotting material consists of white powder derived from ground seashells. It was applied directly to fresh brown ink annotations. The process of blotting caused the ink to transfer into the powder layer (p. 183).
Evidence
"White powder, directly applied to fresh ink. Ink transferred to powder when it was applied. Presence of chorine points to ground seashells. Purpose: blotting"
Remarks
The presence of Chlorine (Cl) and Strontium (Sr) detected via SEM-EDX provides the chemical fingerprint for identifying the white powder as ground seashells rather than mineral chalk (p. 183).
Scientific Analysis
Analytical Techniques
XRF
Certainty Level
Probable
Instrumentally Verified
Not Verified
Metadata
Material Type
pigment
ColorWhite
RegionYemen
Approx. Year1950
Source Information
AuthorA. Regourd & K. Scheper, Shifting sands of writing inks in Yemen, CmY 7
CollectionOr. 6353a
Language
N/A
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