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. inorganic red pigment
11. iron oxide red (pigment)

Anotations

Scope note:

Refers to red iron oxide or a similar pigment, particularly when it is a component of reddish-brown chalk or mixed with lime and water and applied with a brush to create underdrawings for frescoes. These underdrawings are called "sinopie."