[Opticon Chemical, CA] A brand name for a single-component UV curing adhesive. Opticon UV-57 is a quick setting adhesive with a refractive index close to glass so that it forms a clear glass-to-glass bond (Madsen 1972). It sets in approximately 5 minutes at room temperature when exposed to ultraviolet light.
Soluble in acetone.
H.Madsen, "A New Product for Mending Glass" Studies in Conservation, 17:131-132, 1972.