Difference between revisions of "Barium copper silicate"
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== Additional Information == | == Additional Information == | ||
| − | ° E.West FitzHugh, L.Zycherman "A Purple Barium Copper Silicate Pigment from Early China" ''Studies in Conservation'' 37:145-154, 1992. ° E.West FitzHugh, L.Zycherman "An Early Man-made Blue Pigment from China - Barium Copper Silicate" ''Studies in Conservation'' 28:15-23, 1983. | + | ° E.West FitzHugh, L.Zycherman "A Purple Barium Copper Silicate Pigment from Early China" ''Studies in Conservation'' 37:145-154, 1992. |
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| + | ° E.West FitzHugh, L.Zycherman "An Early Man-made Blue Pigment from China - Barium Copper Silicate" ''Studies in Conservation'' 28:15-23, 1983. | ||
== Authority == | == Authority == | ||
Revision as of 10:31, 8 January 2014
Description
A general name for either a blue (BaCuSi4O10) or purple (BaCuC2O6) pigment found in paints and ceramic glazes on Chinese artifacts from the Han dynasty, 208 BCE - 220 CE.
Synonyms and Related Terms
Han blue; Han purple; Chinese blue; Chinese purple; silicato de bario y cobre (Esp.); silicato di rame e bario (It.)
Other Properties
The purple is destroyed by dilute acids with some effervescence. The blue is acid-resistant.
Both colors are strongly birefringent under crossed polars.
| Refractive Index | 1.72-1.74 (purple); 1.593-1.633 (blue) |
|---|
Additional Information
° E.West FitzHugh, L.Zycherman "A Purple Barium Copper Silicate Pigment from Early China" Studies in Conservation 37:145-154, 1992.
° E.West FitzHugh, L.Zycherman "An Early Man-made Blue Pigment from China - Barium Copper Silicate" Studies in Conservation 28:15-23, 1983.
Authority
- Nicholas Eastaugh, Valentine Walsh, Tracey Chaplin, Ruth Siddall, Pigment Compendium, Elsevier Butterworth-Heinemann, Oxford, 2004