Galvanized - A ferrous metal that is covered with zinc to protect it from rusting.

Glare – Light brightness greater than the human eye can adjust to. Glare causes discomfort, annoyance, and lowered visibility.

Glass Prism – a piece of glass with a triangular cross section, used in color science to produce spectrum colors.

Glazing – Setting glass.

Glazing Compound - A caulk, sealant, or putty that is used to seal a glass pane into its frame.

Gloss – The sheen or luster of a surface, ability to reflect light; based on degree of smoothness of a surface.

Gloss Meter – An instrument for measuring gloss.

Gloss Oil – An oil designed to increase the gloss of a paint.

Gloss Retention – Ability to retain original gloss.

Grain – Surface appearance, usually of wood.

Grain Cracking - Cracking of a coating, parallel to the grain of the wood substance.

Grain Raising - The swelling and standing up of short, broken fibers of wood caused by absorption of a liquid. Water is particularly inclined to cause this.

Grass Cloth – Handmade paper, usually imported from Japan, made by gluing woven native grasses onto a handmade paper backing. Also, machine-made wall coverings that simulate grass cloth.

Gray Blast Cleaning – Commercial blast.

Grit – An abrasive obtained from slag and various other materials.

Ground Coat – Coating of pigment applied to raw stock before the top or design colors are put on. Acts as background for a design.

Guild – A union of workers in the same craft or trade.

Gypsum - Natural crystalline calcium sulfate used as an extender pigment in paint, and in the manufacture of gypsum wallboard and plaster of Paris.

Gypsum Board – See Drywall