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. [printing and printing processes and techniques]
7. printing processes
8. photomechanical processes
9. intaglio photomechanical processes

Additional parents:

1. top of the aat hierarchies
2. Activities Facet
3. Processes and Techniques
4. processes and techniques by specific type
5. image-making processes and techniques
6. printing and printing processes and techniques
7. printing processes
8. photomechanical processes
9. relief photomechanical processes
10. photoengraving

Anotations

Scope note:

Process for producing a photographic printing plate, using a particular method developed by William Henry Fox Talbot. This process for producing a printing plate from a photograph was patented in 1858. After coating a copper plate with bichromated gelatin, Talbot exposed the plate to light under a positive transparency. It was then dusted with powdered resin and heated evenly to distribute the resinous particles. The plate was then etched in an acid solution that dissolved the gelatin and etched those same areas. After cleaning, the plate was inked, wiped, and printed on paper. He coined the term photoglyph from the Greek for "carved light."