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. red pigment
10. synthetic organic red pigment

Anotations

Scope note:

A clear, bright red, transparent lake pigment prepared by precipitating the synthetic dyestuff alizarin on a neutral base of alumina trihydrate. This produces a brilliant, ruby red color that has fair to good permanency. Other base materials are used to give varying shades of red.