Hierarchy classification:

1. top of the aat hierarchies
2. Materials Facet
3. Materials (hierarchy name)
4. materials (substances)
5. [materials by function]
6. photographic materials
7. photographic media
8. photographic film (photographic materials)

Anotations

Scope note:

Negative photographic materials that are sensitive to violet, blue, green, and yellow, but not to red, light. Formerly used for general photography, but now employed mainly for photographing of phosphor screens, such as cathode-ray tubes, and for other purposes requiring green, but not red, sensitivity.