Hierarchy classification:

1. top of the aat hierarchies
2. Activities Facet
3. Processes and Techniques (hierarchy name)
4. [processes and techniques by specific type]
5. [image-making processes and techniques]
6. [photography and photographic processes and techniques]
7. photographic processes
8. pigment processes

Narrower term/s

• carbon process[+]
  • Artigue process
  • color carbon process
• gum bichromate process
• Fresson
• dusting-on process[+]
  • ceramic process
• oil processes[+]
  • bromoil process

Anotations

Scope note:

Processes for making photographic prints using a bichromate compound which, when exposed to light, causes its colloid binder to harden; unhardened areas are washed or abraded away. Pigments may be incorporated before exposure or during development. Though the expression dichromate is now preferred in chemistry, bichromate remains common usage in photography.