indigo and copper compounds
Ottoman
Recipe Details
Ingredients
indigo, lead white, copper compounds
Preparation Steps
The text notes that for Ottoman calligraphy, indigo was specifically blended with lead white to achieve a particular azure hue (p. 7). Copper compounds were also utilized in the production of blue inks (p. 7).
Original Recipe Text
The text notes that for Ottoman calligraphy, indigo was specifically blended with lead white to achieve a particular azure hue (p. 7). Copper compounds were also utilized in the production of blue inks (p. 7).
Evidence
"In making blue inks, indigo and copper compounds had been used. In Ottoman calligraphy, indigo was used with lead white to obtain azure color (Nefeszade, 1938)."
Remarks
The discussion distinguishes between natural indigo (extracted from Indigofera tinctoria) and synthetic variants, noting that the presence of indirubin is a primary differentiator (p. 7). Natural indigo particles are described as fine and opaque under microscopic examination (p. 7).
Scientific Analysis
Certainty Level
Inferred
Instrumentally Verified
Not Verified
Metadata
Material Type
ink
ColorBlue
RegionOttoman
Source Information
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