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. copying
7. reprographic processes

Anotations

Scope note:

Process used especially for copying letters, invented in the 19th century, in which writing or drawing made with aniline dye is transferred to a prepared gelatin surface from which a number of copies can be made; eventually replaced by spirit duplicating.