Hierarchy classification:

1. top of the aat hierarchies
2. Materials Facet
3. Materials (hierarchy name)
4. materials (substances)
5. [materials by origin]
6. biological material
7. animal material
8. processed animal material
9. leather
10. [leather by origin]
11. calf (leather)

Anotations

Scope note:

Chrome-tanned calf traditionally dyed brown and boarded in one direction head to tail to produce the characteristic long pattern termed 'willow.' Distinct from "box calf" which is usually dyed black and is boarded in two directions to produce a rectangularly crossed pattern.