iron oxide yellow
Nigeria
Source: Journal of Islamic Manuscripts 2 (2011) 1-35
Recipe Details
Ingredients
yellow ochre, goethite, gum
Preparation Steps
Yellow ochre containing goethite was sourced from rocks and soils (p. 12). The process followed the same levigation and decantation methods as red ochre to produce pigments for Qurʔānic decoration (p. 11).
Original Recipe Text
Yellow ochre containing goethite was sourced from rocks and soils (p. 12). The process followed the same levigation and decantation methods as red ochre to produce pigments for Qurʔānic decoration (p. 11).
Evidence
"Microscopic examination of opaque yellow pigments revealed iron oxide yellow and tested positive for iron with potassium ferrocyanide. These pigments chemically tested negative for arsenic eliminating the possibility of realgar... or orpiment."
Remarks
Used for diacritical marks and decoration. Opaque yellow pigments were confirmed as iron-based ochres rather than orpiment (p. 11).
Scientific Analysis
Chemical CompositionFeO(OH)
Analytical Techniques
Microscopic examination
potassium ferrocyanide test
arsenic chemical test
Certainty Level
Probable
Instrumentally Verified
Verified
Metadata
Material Type
pigment
Bindergum
ColorYellow
RegionNigeria
Source Information
TitleInks in the Islamic Manuscripts of Northern Nigeria - Old Recipes, Modern Analysis and Medicine
AuthorJournal of Islamic Manuscripts 2
CollectionNorthern Nigerian Qurʔāns
Language
N/A
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