ferrogallic process
Identification code: 300133379
Hierarchy classification:
Additional parents:
Alternative term/s
- black-line process
- blackline process
- ferro-gallic process
- ferro-tannic
- ferrogallic
- ink process
Anotations
Scope note:
An iron process largely used for reproducing technical drawings; produces an image in black. The image is developed out with gallic acid and is fixed by washing in water.
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