Glass with a diffuse finish created by an acid bath is known as:

Glass with a diffuse finish created by an acid bath is known as etched glass. The etching process involves applying an acid to the surface of the glass, which frosts or roughens it, creating a translucent finish. This technique not only alters the surface appearance by diffusing light but also enhances privacy while allowing light to pass through.

Etched glass is often used in various applications, such as decorative windows, shower doors, and office partitions, where a balance between light transmission and privacy is desired. The finish is not as clear as polished glass, giving it a distinct aesthetic quality that can be visually appealing in architectural design.

In contrast, triplex glass refers to laminated glass consisting of multiple layers for enhanced safety, bound glass relates to glass that has been integrated or connected with other materials, and beveled glass features edges that are cut at an angle to create a reflective surface along the edges. None of these processes involve the creation of a diffuse finish through acid treatment, which is specific to etched glass.