Hierarchy classification:

1. top of the aat hierarchies
2. Activities Facet
3. Processes and Techniques (hierarchy name)
4. [processes and techniques by specific type]
5. analysis and testing techniques

Anotations

Scope note:

Evaluation tests used for museum storage materials in order to detect any emission of faint amounts of chemicals that can damage objects over time. Created in 1973 by conservation scientist Andrew Oddy.The test material is enclosed in an airtight reaction vessel with three small metal coupons: copper, silver and lead. The container is sealed with a small amount of water to maintain a high humidity, then heated at 60 degrees Celsius for 28 days. An identical container with three metal coupons acts as a control. At the end of the trial, the metal coupons are monitored for corrosion effects.