opal glass

Definition: Type of glass which is opaque and white, used to diffuse light e.g. as in envelope of domestic light bulb. * Some types (flash opal) use a layer of diffusing material e.g. white powder, coated onto ordinary glass; others (pot opal) use beads embedded through the depth of the glass.

Previous Term: opacity  Next Term: opaque

Type a photography term below to find its definition: