Hierarchy classification:

1. top of the aat hierarchies
2. Materials Facet
3. Materials (hierarchy name)
4. materials (substances)
5. [materials by function]
6. coating (material)
7. [coating by composition or origin]
8. varnish
9. [varnish by function]

Narrower term/s

• isolating varnish
• retouch varnish

Anotations

Scope note:

Any varnish or sizing applied between layers of paint. Variously used to describe retouch varnish, isolating varnish, and thin sizing varnishes used between tempera or casein underpainting and an oil glaze or overpainting to prevent the glaze from being absorbed.