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 techniques
8. picture-taking techniques

Anotations

Scope note:

A process to record the surface conduction characteristics of an object or material by placing it on photographic film, which is then exposed by the blue and ultraviolet light of a corona generated by a high-voltage, high-frequency power.