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. condition changing (processes)
6. surface or structural changes
7. weathering

Anotations

Scope note:

Refers to the creation of salts or esters of sulfuric acid that occurs when sulfate ions are incorporated into molecules. In a conservation science context sulfation most often refers to chemical weathering of stone by airborne pollution.