Hierarchy classification:

1. top of the aat hierarchies
2. Objects Facet
3. Visual and Verbal Communication (hierarchy name)
4. Visual Works (hierarchy name)
5. visual works (works)
6. [visual works by material or technique]
7. photographs
8. [photographs by form]
9. positives (photographs)
10. photographic prints
11. [photographic prints by process]
12. pigment prints (analog process)
13. gum bichromate prints

Anotations

Scope note:

Gum prints combined with another process, typically platinum. The highlights and mid-tones are formed using a platinum print. A gum dichromate print is placed on top to enhance the shadow areas. Combination gum dichromate prints are rare.