Hierarchy classification:

1. top of the aat hierarchies
2. Objects Facet
3. Components (hierarchy name)
4. components (objects parts)
5. [components by specific context]
6. [tool and equipment components]
7. printing press components

Anotations

Scope note:

Thin iron frames, hinged to the tympan of a hand press, securing the sheet and lowered with it to face the form before the carriage is rolled under the platen. The frisket was covered in paper with windows cut in it where, and only where, type meets paper.