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]

Anotations

Scope note:

Photographic prints made on a gelatin-silver chloride photographic paper introduced commercially in 1867 by the Munich-born chemist Johann Baptist Obernetter. This was considered the first industrial ready-to-use photographic paper print process. Aristotypes are composed of a paper layer, a layer of baryum sulphate in gelatin, and a layer of emulsion containing silver chloride suspended in a binder. The baryta layer made purer whites possible. As this was was a printing-out-paper, aristotypes are exclusively contact prints.