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. black pigment
10. organic black pigment
11. carbon black

Anotations

Scope note:

A form of carbon black that is produced in refractory chambers in the absence of air by the decomposition of acetylene gas preheated to 800 degrees Celsius. As a pigment, it is softer, bluer, and more intense than other carbon blacks. It is also used in industrial applications requiring high electrical conductivity, such as in dry cells.