Hierarchy classification:

1. top of the aat hierarchies
2. Physical Attributes Facet
3. Conditions and Effects (hierarchy name)
4. [conditions and effects by specific type]
5. [conditions and effects for photography]

Anotations

Scope note:

A deterioration of photographs, occurring when silver is attacked by any of a wide variety of oxidants that convert metallic silver atoms to highly reactive and mobile silver ions. It is the most common cause of fading of silver images.