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
9. bichromate processes
10. carbon process

Anotations

Scope note:

A variant of the carbon process to produce contact prints; the image is formed from a pigment, usually carbon black, in a colloid suspension that has been made light-sensitive with bichromates. Marketed under the name Charbon Velours.