Hierarchy classification:

1. top of the aat hierarchies
2. Materials Facet
3. Materials (hierarchy name)
4. materials (substances)
5. [materials by origin]
6. biological material
7. plant material
8. [wood and wood by product]
9. [wood by product]

Anotations

Scope note:

Wood that has undergone a process that uses vacuum and pressure to force chemical preservatives into the wood. The goal of process is to protect the wood from termites or other insects and fungal decay; the wood has been found to contribute to environmental pollution.