Han Purple and Han Blue - Comparison

Comparison

Han purple Han blue
Chemical formula BaCuSi2O6 BaCuSi4O10
Minimum temperature for production 900–1000 °C c. 1000 °C
Manufacture time 10–24 hours 20–48 hours
Decomposition temperature 1050–1100 °C >1200 °C
Thermally stable? No Yes
Stable in acid? No Yes
Color increase when ground? Yes Yes

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