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. synthetic inorganic blue pigment

Anotations

Scope note:

Chinese purple (also called Han purple) is a synthetic barium copper silicate pigment developed in China at least 2,000 years ago. Chinese purple fades and decomposes over time, particularly in contact with acids or heat.