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:

Refers to a type of glass characterized by two or more layers of color, usually a thin layer or "flash" of colored glass layered on a clear or light-colored glass. It is created by dipping a small blob of dark glass into a pot of light-colored glass, and then blowing the blob into a bubble in which the distinct layers are formed. It is used to make stained glass windows, valued over "pot-metal glass" for certain effects, because the thinner layer of color allows more light to pass through the window, while the saturated color of pot-metal glass results in a darker interior.