Hierarchy classification:

1. top of the aat hierarchies
2. Materials Facet
3. Materials (hierarchy name)
4. materials (substances)
5. [materials by composition]
6. inorganic material
7. glass (material)
8. [glass by technique]

Anotations

Scope note:

General term for any glass used as a material that is not "blown glass," that is not shaped by blowing air through a blowpipe into a glob of molten glass. The term is used in situations where it may be assumed that the glass normally would be blown, but is not; also used to refer to glass as a raw material prior to being blown.