Hierarchy classification:

1. top of the aat hierarchies
2. Objects Facet
3. Furnishings and Equipment (hierarchy name)
4. Tools and Equipment (hierarchy name)
5. equipment
6. [equipment by process]
7. [framing and mounting equipment]

Anotations

Scope note:

Designates given materials used to close off the reverse side of paintings on canvas. Such materials include but are not limited to simple cardboard, Perspex (acrylic), Melinex (polyester). Backboards are applied either on the stretcher or on the frame, using screws, nails, or tape.