Hierarchy classification:

1. top of the aat hierarchies
2. Physical Attributes Facet
3. Attributes and Properties (hierarchy name)
4. [attributes and properties by specific type]
5. [physicochemical attributes and properties]
6. photosensitivity

Anotations

Scope note:

Describes a phenomenon of photosensitivity in which a material undergoes a change of color when illuminated with light of the appropriate wavelength; and reverts to its original state either in the dark or upon treatment with irradiation of a different wavelength.