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. green pigment
10. synthetic inorganic green pigment

Anotations

Scope note:

Pale green pigment that is an intermediate product in the manufacture of synthetic ultramarine blue; sodium sulfate or carbonate, clay, silica, sulfur, and charcoal are heated in a reducing atmosphere to create a melted mass that is green in color, then ground, washed, and dried.