Hierarchy classification:

1. top of the aat hierarchies
2. Materials Facet
3. Materials (hierarchy name)
4. materials (substances)
5. [materials by composition]
6. organic material
7. plastic (material)
8. [plastic by property]
9. thermoplastic
10. polyamide
11. nylon

Anotations

Scope note:

Modified nylon developed by DuPont in the 1940's; formerly used in conservation as an adhesive and sizing agent for fragile paper, and as a consolidant for stone and friable pigments. Its use was discontinued following the discovery that over time it becomes insoluble and opaque, and is unsafe to remove.