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Coating defects and others details.

Coating defects and others details.

CHECKING-Checking coating defects of paint failure in which many shall cracks appear in the surface of paint.

Coating defects and others details.

COALESCING-The settling or drying of an emulsion paint as the water evaporates.

COHESION-coating defects of attraction of molecules within a coating ( how it holds together).

COLORANT-Concentrated colour that can be added to paints to make a specific colour.

CRACKING-Cracking coating defects a type of paints failure characterized by breaks in irregular lines wide enough to expose the underlying surface.

CRAWLING-Varnish coating defects in which poor adhesion of varnish to surface in some spots causes it to gather up in globs.

AIRLESS SPRAY-A spray that increases the fluids pressure of paint by means of a punp that causes atomization with air,resulting in higher film build and little or no over spray.

ANCHORING-Mechanical bonding of a coating to a rough surface as contrasted with adhesion ,which is chemical bonding.

ANTI-CORROSIVE PAINT-Metal paint designed to inhibit corrosion .Applied directly to metal.

BLEEDING-Coating defects Undercoat staining through the topcoat.

BLISTERING-The formation of bubbles or pimples on the painted surface caused by moisture in the wood by painting before the previous coat has dried thoroughly or by excessive heat or grease under the paint.

Coating defects and others details.

BLUSHING-Coating defects a gloss film turning flat or a clear lacquer turning white,usually caused by moisture condensation during the drying process.

BUBBLES-Coating defects air bubbles in drying paint film caused by excessive brushing during application

BUILD-Thickness or depth of paint film.

CRAZING-Small ,interlacing cracks on surface of finish.

CURING-Final conversion or drying or a coating materials.

DRY TO HANDLE-That stage of drying when a paint film has hardend sufficiently so the object or surface painted may be used without marring.

DURABILITY-The ability of paint to last or hold up well against the destructive agents such as weather,sunlight,detergents,air pollution,abrasion or marring.

EGGSHELL FINISH-The degree of gloss between a flat and gloss finish.

EMULSION PAINT-Paint in which particle are suspended in water or oil with the aid of an emulsifier as in latex paint.

ENAMEL PAINT-Broad classification paints that dry to a hard finish they may be flat gloss or semi gloss.

EPOXY-Clear finish having excellent adhesion qualities.Extremly abrasion and chemical resistant .Epoxies are alcohol proof and very water resistant.

ETCH-Surface preparation by chemical means to improve the adhesion of coating.

FILLER-A product used to fill the pores of wood before applying a prime of finish coat.

FILM-Layer or coat of paint or other finish.

FINISH COAT-Last coat of the paint or other finish coat.

FLAKING-Coating defects a form of paint failure characterized by the detachment of small pieces of the film from the surface of the previous coat of paint.Cracking or blistering usually precedes it.

Coating defects and others details.

FLASH POINT-The temperature at which a coating or solvent will ignite.

GALVANIZED-A thin coating of zinc that covers iron or steel to prevent rust.

GLOSS-The luster or shininess of paint and coating are generally classified as flat,semi gloss or gloss,the latter has the higher reflecting ability.

GLOSS METER.A standard scale for measuring the shininess 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.

HARDNESS-The ability of a paint film to resist denting scratching or marring.

HIDING POWER-The ability of a paint to hide the previous surface or color.

HOLIDAYS-Coating defects a voids in the dried paint film.

LACQUER-A fast drying clear pigmented coating that dries by solvent evaporation.

LATEX-A water thinned paint such as a polyvinyl acetate,styrene butadiene or acrylic.

LEVELING—Ability of a paint to flow out free from ripples,pockmarks and brush marks after application.

LIFTING-The softening and penetration of a previous film by solvents in the paint being applied over it,resulting in raising and wrinkling.

MASKING-Temporary covering of areas not to be painted.

METALLICS-A class of paint that include metal flakes in their composition.

OPACITY-The ability of a paint to hide the previous surface or color.

OPAQUE COATING-A coating that hides the previous surface coating.

ORANGE PEEL-Film having the roughness og an orange due to poor roller or spray application.

Coating defects and others details.
Orange Peel

PAINT GAUGE-Instrument for measuring the thickness of paint film.

PEELING-Detachment of a dried paint film in relatively large pieces,usually caused by moisture or grease under the painted surface.

PIGMENTS-Paint ingredients mainly used to impart color and hiding power.

PINHOLE-Very small holes in paint film,usually not deep enough to show undercoat.

POLYURETHANE-Wide range of coatings,ranging from hard gloss enamels to soft flexible coatings.Good to very good adhesion,hardness,flexibility and resistance.Surface preparation critical.

POTLIFE-Amount of time after mixing a two part paint system during which it can be applied.

PRIME COAT-The first coat or undercoat that helps bind the topcoat to substrates.

RESIN-A natural or synthetic materials that is the main ingredient of paint and that binds ingredients together.It also aids adhesion to the surface.

RUNS-Blemished film caused by excessive flow of coating.

Coating defects and others details.

RUST PREVENTATIVE PAINT OR PRIMER-The first coat of paint applied directly to iron to steel structures to slow down or prevent rust.

SAGS-Excessive flow,causing runs or sagging in paint film during application.Usually caused by applying to heavy a coat of paint or thining to much.

Coating defects and others details.

SEALER-A thin liquid applied to seal a surface,to prevent previous paint from bleeding through from the surface or to prevent undue absorption of the topcoat into the substrate.

SEMI GLOSS-Having a luster between full and flat.

SEMI TRANSPARENT-A degree of hiding greater than transparent but less than opaque.

SETTLING-Paint separation in which pigments accumulate at the bottom of the container.

SHEEN-The degree of luster of a dried paint film.

SOLVENT-The volatile part of paint composition that evaporates during drying.

SPACKLING COMPOUND-A materials used as crack filler for preparing surfaces before painting.

SPRAYING-A method of application in which the coating materials is broken up into a fine mist that is directed onto the surface to be coated.

SPREADING RATE-The area to which paint can be spread,usually expressed as square feet per gallon.

TEXTURE-The roughness or irregularity of a surface.

TEXTURE PAINT-Paint that can be manipulated by brush,roller ,trowel or other tool to produce various effects.

THINNERS-Solvents used to thin coatings.

THIXOTROPY-The property of a material that causes it to change from a thick,pasty consistency to a fluid consistency upon agitation ,brushing or rolling.

TINT BASE-The basic paint in a custom color system to which colorants are added.

TOUCH UP-The ability of a coating film to be spot repaired  without showing.

TURPENTINE-A colorless liquid,which is used as a thinner for oil paints and varnishes,distilled from the products of the pine tree.

UNDERCOAT-A primer or intermediate coating before the finish coating.

VARNISH-Transparent liquid that dries on exposure to air to give a decorative and protective coating when applied as a thin film.

VEHICLE-T he liquid portion of paint composed mainly of solvents,resins or oils.

VINYL-A resin with poor adhesion but good hardness ,flexibility and resistance.Used for swimming pools,tanks lining and marine equipment.

VISCOSITY-The thickness of a coating as related to its ability to flow as a liquid.

WATER EMULSIONS-Mixture of pigment and synthetic resin in water with low solvent  emission ,low fire hazards and toxicity and good durability and chemical resistance.

WEATHERING-The effect of exposure to weather on paint films.

WRINKLING-Development of ridges and furrows in a paint film when the paint dries.

Coating defects and others details.

ZINC CHROMATE-Rust inhibiting pigment ,greenish yellow in color that is used with high a high hiding pigment,

ZINC OXIDE-Substance used as a white pigment for high hiding power hardness and gloss.Reduces yellowing,increases drying provides resistance to sulfer fumes and mildew.Used with linseed oil for self cleaning exterior paints.

About Jitendra Bhardwaj

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