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

Anotations

Scope note:

The action of making a substance more physically soft or pliable; to lessen hardness or rigidity. This may refer to applications of softening agents or processes in treatment of materials such as leather or parchment to increase softness, smoothness, or plasticity.