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. salted paper processes

Anotations

Scope note:

William Henry Fox Talbot's process to make negatives on paper; the image is formed from silver iodide coated on the base without a binder and is developed. The calotype process produced a translucent original negative image from which multiple positives could be made by simple contact printing. This gave it an important advantage over the daguerreotype process, which produced an opaque original positive that could only be duplicated by copying it with a camera. In the mid-20th century, the term was sometimes used incorrectly for any salted paper or paper negative process.