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

Narrower term/s

• blueprint process
• kallitype
• platinum process[+]
  • sepia platinotype
• palladium process
• ferrogallic process [NP]

Anotations

Scope note:

Photographic processes based on the photosensitivity of certain iron compounds. Usually require intense light and thus employ contact printing. Do not use when iron sulfate is used to develop a silver image.