Glossary of Terms
Adhesive Chips:
A free chip of glass that is fused or is adhering tightly to the surface of the glass.
Bevel: 1
A deviation from a right-angle break on a scored and severed glass edge.
Bow:
A condition in which a lite of glass departs from a true plane.
Bubble: 2
A round or elongated gaseous inclusion in the glass, sometimes breaking the surface.
Corner On/Off: 3
The angle formed by the intersection of the adjacent edge faces where either an excess or a lack of glass can occur.
Crush:
A small lightly pitted area in the glass surface having a dull grayish appearance.
Dig:
A very short deep scratch or puncture in the glass surface.
Flake Chip: 4
A shallow shell-like chip of glass surface at an edge. The width is the dimensional extent of the chip on the glass surface measured from the intersection of the edge faces and surface face planes.
Flare:
A sharp thin extension of glass at a cut edge where the fracture tends to approach a plane parallel to the surface.
Knot: 5
A small transparent body of incompletely melted glass having an irregular or tangled appearance.
Process Surface Flaw: 6
Gray of dull-like marking caused by contact of the glass surface with another material while being moved along a conveying system.
Ream:
Included cords, layers or striae which are non-homogeneous with the main body of the glass.
Repetitive Flaw:
One that occurs in a predictable frequency within a piece of glass in a constant pattern or location.
Rub:
An abrasion of the glass surface having appreciable width and a frosted appearance.
Scratch: 7
A cut or tear in the surface of the glass.
Stone: 8
An opaque solid inclusion in the glass.
String:
A short transparent tail appearing as if a thread of non-homogeneous glass were incorporated in the glass.
Square:
A condition of rectangularity which refers to the extent to which any corner of a rectangular lite approaches 90 degrees.
Thickness:
The surface-to-surface dimension of the glass.
 
Tin Deposit: 9
A small particle of metallic tin or oxide adhering to the surface of the glass.