Galvanic Corrosion – Corrosion of dissimilar metals in electrical conduct.
Galvanized – A thin coating of zinc that covers iron or steel to prevent rusts.
Gelling – Conversion from liquid to gel state.
Generic – Belonging to a particular family.
Glazing – A term used to describe several types of finishing materials. (1) Glazing putty is of a creamy consistency and is applied to fill imperfections in the surface. (2) A glazing stain is a pigmented stain applied over a stained, filled or painted surface to soften or blend the original color without obscuring it. (3) A glaze coat is a clear finish applied over previously coated surfaces to create a gloss finish.
Glazing Compound – Putty used to set glass in window frames and to fill nail holes and cracks.
Gloss – Luster or sheen of paints and coatings; ability to reflect light; brightness.
Gloss Meter – A standard scale for measuring the sheen or light reflectance of paint. Different brands with the same description such as semi-gloss or flat may have quite different ratings on the gloss meter.
Grain Raising – Swelling and standing up of the wood grain caused by absorbed water and solvents.
Graining – Simulating the grain of wood by means of specially prepared colors or stains and the use of graining tools or special brushing techniques.
Gray Blast – Commercial blast.
Grit – Abrasive blasting medium
Guide Coat – A coat similar to the finish coat but of different color to ensure good coverage.
Hardboard – Reconstituted natural wood, fabricated by reducing natural wood to fibers and then pressing the fibers together into panels of various thickness.
Hardener – Curing agent; catalyst
Hardness – The degree a material will stand pressure with deformation or scratching.
Hazing – Clouding.
Hiding Power – The ability of a paint to hide the previous surface or color.
High Build – Producing thick dry films per coat.
Holdout – The ability of a paint film to dry to its normal finish on a somewhat absorptive surface.
Holidays – Voids, pinholes, skips, discontinuities in the dried paint film.
Honeycombing – Lack of vertical film integrity, formation of cell structure
Hot Spots – Lime spots, which are not completely cured and bleed through the coating on a plastered wall.
Humidity – Measure of moisture content; relative humidity is the ratio of the quantity of water vapor in the air at a given temperature.
Hydrophilic – Having an affinity for water.
Hydrophobic – Having an antagonism for water.
Hydroscopic – Having a tendency to absorb water.
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