Organic yellows
Nigeria
20th Century
Source: Journal of Islamic Manuscripts 2 (2011) 1-35
Recipe Details
Ingredients
turmeric root (BL63), karaya gum (BL59), egg yolk, egg white
Preparation Steps
Replication used a boiled aqueous turmeric (BL63) extract of shredded root and karaya gum (BL59) which made bright yellow-brown mucilage that on drying shone (p. 19). Indigenous organic yellow dyes were also produced from an aqueous extract of macerated roots of Cochlospermum tinctorium (BL7) (p. 20).
Original Recipe Text
Replication used a boiled aqueous turmeric (BL63) extract of shredded root and karaya gum (BL59) which made bright yellow-brown mucilage that on drying shone (p. 19). Indigenous organic yellow dyes were also produced from an aqueous extract of macerated roots of Cochlospermum tinctorium (BL7) (p. 20).
Evidence
"Organic yellows were identified by the stain-like appearance characteristic of a dye. Biuret tests on glossy yellow ink flakes yield one positive for protein, indicating the possible use of egg yolk or egg white as a pigment binder."
Remarks
In Yola, manuscripts showed yellow ink that became tacky and stuck to adjacent paper when exposed to moisture (p. 19).
Scientific Analysis
Analytical Techniques
Microscopic examination
Biuret tests
Certainty Level
Probable
Instrumentally Verified
Verified
Metadata
Material Type
ink
BinderAlbumen
ColorYellow
RegionNigeria
Approx. Year1950
Source Information
TitleInks in the Islamic Manuscripts of Northern Nigeria - Old Recipes, Modern Analysis and Medicine
AuthorJournal of Islamic Manuscripts 2
CollectionNorthern Nigeria
Language
N/A
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