Difference between revisions of "Barium copper silicate"
Revision as of 11:01, 13 June 2013
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.)
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)|
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.
- Nicholas Eastaugh, Valentine Walsh, Tracey Chaplin, Ruth Siddall, Nicholas Eastaugh, Valentine Walsh, Tracey Chaplin, Ruth Siddall, Pigment Compendium, Elsevier Butterworth-Heinemann, Oxford, 2004