Mirrorglass

Mirrorglass is glass that carries a reflective coating to form a mirror surface. Most commonly, a metal layer of aluminum or silver is deposited on the back of clear float glass and protected with a lacquer or paint. This back-silvered mirror is the standard form used in homes, bathrooms, and architecture. A front-surface mirror places the reflective coating on the outer surface, offering reduced distortion for near viewing but greater susceptibility to scratching and weathering; it is common in optics and stage applications.

Manufacturing and properties: Modern mirrorglass is produced by vacuum-depositing a metal film onto the back of the glass, then sealing it with a protective layer. Some products use tempered or laminated safety glass to reduce injury if broken. Typical visible-light reflectance is around 80–90 percent, with a faint greenish tint from the glass.

Applications: Domestic mirrors, vanity and architectural panels, furniture, and automotive rearview mirrors are typical uses. Two-way mirrors, which are partially reflective and partially transparent, are a specialized form used in security and surveillance contexts.

Care and limitations: Clean with non-abrasive cleaners and soft cloths. Avoid harsh acids or ammonia-based cleaners that can deteriorate coatings. Edge sealing and proper mounting improve durability in humid environments.

See also: Mirror glass, safety glass, decorative mirrors.