Hierarchy classification:

1. top of the aat hierarchies
2. Materials Facet
3. Materials (hierarchy name)
4. materials (substances)
5. [materials by function]
6. colorant (material)
7. pigments
8. [pigment by color]
9. blue pigment
10. inorganic blue pigment

Anotations

Scope note:

General term for either a blue (BaCuSi4O10) or purple (BaCuC2O6) pigment found in paints and ceramic glazes on Chinese artifacts; made by melting silica with copper and barium at very high temperatures. Developed in China and used to create Chinese blue and Chinese purple.