ALA Lighting Specialist Practice Exam

The term for glass that has been treated to achieve a diffuse finish through an acid bath is known as etched glass. This process involves the application of a chemical solution that etches the surface of the glass, creating a frosted appearance. The result is translucent rather than transparent, allowing light to pass through while obscuring visibility. This type of glass is often used for decorative purposes, providing aesthetic appeal as well as privacy in various applications such as windows, doors, and light fixtures.

The other types of glass mentioned in the choices have distinct characteristics: triplex glass refers to a type of safety glass made up of three layers; bound glass typically is not a common term in glass finishing; and beveled glass features angled edges that reflect light to create a decorative effect. Each of these differs significantly from the frosted finish achieved with acid-etched glass.