indigo
Iran
18th Century
Source: Koochakzaei et al. Heritage Science (2022) 10:30
Recipe Details
Ingredients
indigo, white lead, calcite
Preparation Steps
Indigo was mixed with white lead and calcite. White lead was added to brighten and substantiate the indigo pigment (p. 7). Calcite (calcium carbonate) was used to correct blue color characteristics (p. 8).
Original Recipe Text
Indigo was mixed with white lead and calcite. White lead was added to brighten and substantiate the indigo pigment (p. 7). Calcite (calcium carbonate) was used to correct blue color characteristics (p. 8).
Evidence
"According to the results, the blue pigment used in this manuscript is indigo. According to the data obtained from FTIR spectroscopy, white lead and calcite were used as additives in this pigment."
Remarks
Microscopic examination shows a single layer mixture of blue and white pigments (p. 6). FTIR spectra in the 650 to 900 cm-1 range allowed for the separation of calcite and white lead signals (p. 7).
Scientific Analysis
Chemical CompositionC16H10N2O2
Analytical Techniques
Raman
FTIR
Polarized Light microscopy
SEM-EDS
Certainty Level
Confirmed
Instrumentally Verified
Verified
Metadata
Material Type
pigment
ColorBlue
RegionIran
Approx. Year1750
Source Information
AuthorKoochakzaei et al. Heritage Science
CollectionKashan, Iran
Language
N/A
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