Hierarchy classification:

1. top of the aat hierarchies
2. Materials Facet
3. Materials (hierarchy name)
4. materials (substances)
5. [materials by function]
6. coating (material)
7. [coating by composition or origin]

Anotations

Scope note:

Refers to a finish applied to bronze by using heat and a combination of copper nitrate, ammonium chloride, iron nitrate, or other chemicals. Depending upon the combination of chemicals used, the effects are dark brown, blackish, greenish, bluish, or reddish.