| Abrading |
Abrading
The use of materials such as glasspaper, wet or dry paper, sinding discs, etc., to smooth down a surface prior to painting, or to matt down existing coatings to provide a 'key' for subsequent coats of paint.
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| Abrasion Resistance |
Abrasion Resistance
The ability of a material to withstand mechanical action such as rubbing, scraping, or erosion that tends to progressively remove material from the surface.
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| Abrasive |
Abrasive
Any material used to wear away, smooth or polish a surface; for example, sandpaper that is used to smooth wood.
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| Absorbency |
Absorbency
The degree to which a surface can soak up a liquid. Some surfaces have varying absorbency. For instance, softwood vary in grain pattern. One of the requirements of a primer is to produce a non-absorbent surface.
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| Accelerated Weathering |
size="3">Accelerated Weathering
Laboratory or field tests intended to stimulate natural outdoor weathering in an intensified situation.
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| Acetone |
Acetone
A solvent used in fast dry, film building coatings. Good solvent, with a low flash point.
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| Achromatic |
Achromatic
Lacking color, black, grey or white.
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| Acid Cleaners |
Acid Cleaners
The acidity dissolves the lime scale and inorganic deposits and denatures many proteins. Works best on lime scale, soap scum, and some proteinaceous soils.
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| Acrylic |
Acrylic
A water borne latex used in emulsion paint. A synthethic polymer used in high performance latex or water based paint as a binder. Acrylic resins enable the coating to last longer and retain its colour.
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| Acrylic Emulsions |
Acrylic Emulsions
Emulsions prepared from acrylic derivatives. Such emulsions noramlly show very good toughness and adhesion even under wet conditions. They also have very good alkali resistance.
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| Activator |
Activator
The material added in two pack coatings -(e.g. epoxies and polyurethanes)- to initiate 'curing'.
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| Adhesion |
Adhesion
The degree of attachment of paint to a surface. Weak adhesion to a surface is a common cause of paint failure. The quality or degree of attachment between a paint coating and the surface beneath it. The ability of dry paint to remain on the surface without blistering, flaking or cracking. Adhesion is probably the single most important property of paint.
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| Adhesion Aeration |
Adhesion Aeration
A condition where the adhesive is filled with miniature air bubbles. Mixing or whipping the adhesive in too vigorous a manner is usually the cause. These bubbles can cause small blisters to form beneath the wallpaper, especially when installing nonbreathable types.
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| Adhesive Mastic |
Adhesive Mastic
A pastel like cement used for applying floor and wall tiles; a waterproof caulking compound used in roofing.
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| Adhesive Penetration |
Adhesive Penetration
The process where the adhesive soaks into the wallpaper substrate during the relaxing or booking period.
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| Adhesive Viscosity |
Adhesive Viscosity
The internal friction of an adhesive that restricts its tendency to flow or spread. The viscosity controls the amount of adhesive you can spread at a given thickness. Adhesive viscosity also affects drying time.
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| Adhesive Volatility |
Adhesive Volatility
The evaporation time associated with a particular adhesive. Volatility increases during the hot summer months, especially if when working on new construction and there is no air conditioning.
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| Adhesive Wrinkles |
Adhesive Wrinkles
Wrinkles or ridges that occur immediately following the hanging of wallpaper, caused by further expansion of the paper. Inadequate soaking time is often a cause. Adhesive wrinkles normally dry out within 24 to 48 hours. Wrinkled wallpaper should generally be removed and reinstalled rather than fixed.
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| Adulteration |
Adulteration
Any admixture of less value than the accepted standard, or the partial substitution of one substance for another without acknowledgment.
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| After Tack |
After Tack
A film defect in which the painted surface, having once reached a tack-free stage, subsequently develops a sticky condition.
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