W

Weathering - Changes on the surface of glass caused by chemical reaction with the environment. Weathering usually involves the leaching of alkali form glass by water, leaving behind siliceous weathering products that are often laminar.

Wetting Off - The separation line for the glasswork from the blowpipe or pipe uses cold water to fracture control the break and separation.

Wheel Engraver - Wheel engraving process of decorating the surface of glass by the grinding action of a wheel, using disks or various size and materials (usually copper but sometimes stone). An abrasive in a grease or slurry is applied to a wheel, as the engraver holds the object against the underside of the rotating wheel.

Wrap - A strand of glass applied hot to a vessel. A term used for the heavy outside bead of glass that is used generally for creative style sometimes used as a contrasting color from a vessel.