A selected area whose glass, damage, exposure, and proposed treatment reasonably represent the larger work scope.
GlassRenu · Educational illustration
Meaning and boundaries
An easy, hidden, or unusually mild location may be useful for safety testing but may not represent final appearance or production conditions.
Why it matters in glass restoration
It tests process effectiveness and adverse effects before committing an entire lite or project.
Related terms
References
- U.S. National Park Service — Preservation Matters: Stained Glass
Publisher’s original source - U.S. General Services Administration — Cleaning Historic Masonry
Publisher’s original source - Getty Conservation Institute — Twentieth-Century Building Materials: History and Conservation
Publisher’s original source