Glass Information and Education

kick: A concavity in the base of a glass vessel ranging from a slight indentation to a deep conical hollow.

kiln: Any of various ovens for hardening, burning, or drying substances; a brick-lined or fiber-insulated "oven" used to fuse glass or to bake or fire ceramics. Kilns used for glass and ceramics will reach temperatures from 1200 to 2400 degrees F.

kiln sitter: A mechanical device that uses a small pyrometric cone to automatically shut off a kiln when the desired "heat work" has been accomplished. The kiln sitter is intended to assist in accurate firings and serve as a deterrent to over-firing. See Cone.

Kiln wash: See Shelf Primer.

knop: A decorative blob or bulge on the stem of a glass, either hollow or solid and of varying shape.