Hierarchy classification:

1. top of the aat hierarchies
2. Materials Facet
3. Materials (hierarchy name)
4. materials (substances)
5. [materials by form]
6. [materials by physical form]
7. [fiber and fiber by product]
8. [fiber by product]
9. paper (fiber product)
10. [paper by form]
11. pasteboard (paper)
12. cardboard

Narrower term/s

• poster board

Anotations

Scope note:

A relatively thin cardboard made from recycled paper; it is clay-coated or surfaced with white paper. Railroad board is often made water resistant to prevent buckling when waterborne paint is used or because of handling with wet hands. Four and six-ply are common thicknesses and it is typically found in black, white, or one of several lackluster, dyed colors.