Lesson 14 Selecting Paint Applicators and Applying Finishes.

Lesson 14Lesson 14

Selecting Paint Selecting Paint Applicators and Applying Applicators and Applying

FinishesFinishes

Next Generation Science/Common Core Standards Addressed!Next Generation Science/Common Core Standards Addressed!

CCSS. ELA Literacy. RST.9‐10.7Translate quantitative or technical CCSS. ELA Literacy. RST.9‐10.7Translate quantitative or technical information expressed in words in a text into visual form (e.g., a table information expressed in words in a text into visual form (e.g., a table or chart) and translate information expressed visually or or chart) and translate information expressed visually or mathematically (e.g., in an equation) into words.mathematically (e.g., in an equation) into words.

CCSS.ELA Literacy.RST.11‐Synthesize information from a range of CCSS.ELA Literacy.RST.11‐Synthesize information from a range of sources (e.g., texts, experiments, simulations) into a coherent sources (e.g., texts, experiments, simulations) into a coherent understanding of a process, phenomenon, or concept, resolving understanding of a process, phenomenon, or concept, resolving conflicting information when possible12.9 conflicting information when possible12.9

Bell Work!Bell Work!

Are brushes used for applying Are brushes used for applying finishing different?finishing different?

What do they look like?What do they look like?What characteristics do you What characteristics do you

look for in applicators for look for in applicators for applying finishes?applying finishes?

TermsTerms Airless sprayersAirless sprayers Brush keeperBrush keeper Compressed air Compressed air

sprayerssprayers DustingDusting EdgersEdgers Flagged bristleFlagged bristle Foam brushFoam brush Natural bristle Natural bristle

brushbrush

OversprayOverspray Paint padsPaint pads Paint stirring bitPaint stirring bit Paint stirring Paint stirring

paddlepaddle Power rollersPower rollers Sash and trim Sash and trim

brushbrush Synthetic bristle Synthetic bristle

brushbrush

Gathering Painting SuppliesGathering Painting Supplies

Prior to the painting, gather Prior to the painting, gather together a paint can opener, together a paint can opener, stirring paddle, paint thinner, a stirring paddle, paint thinner, a paint bucket and paint hook, paint bucket and paint hook, ladders, plastic wrap or ladders, plastic wrap or aluminum foil, and a rubber aluminum foil, and a rubber mallet.mallet.

Gathering Painting SuppliesGathering Painting Supplies

Clean-up supplies including an Clean-up supplies including an empty can, a petroleum based empty can, a petroleum based solvent (turpentine, mineral solvent (turpentine, mineral spirits, denatured alcohol, or spirits, denatured alcohol, or commercial brush cleaner) for commercial brush cleaner) for oil based paint, soap and water oil based paint, soap and water for latex based paint, hair brush for latex based paint, hair brush or steel comb, paper towels, or steel comb, paper towels, and rags should be nearby. and rags should be nearby.

Check the weatherCheck the weather

The temperature should be between 50 The temperature should be between 50 & 95°F to get good bonding and drying & 95°F to get good bonding and drying of the paint. Extreme temp. affects of the paint. Extreme temp. affects AdhesionAdhesion

Keep in mind that if the humidity is Keep in mind that if the humidity is high, drying time will be extended. high, drying time will be extended.

In hot weather, paint in shaded areas.In hot weather, paint in shaded areas. Painting in direct sunlight may dry the Painting in direct sunlight may dry the

paint too fast to get good uniform paint too fast to get good uniform coverage.coverage.

Opening the PaintOpening the Paint

Open the paint can with a paint Open the paint can with a paint opener, not a screwdriver. opener, not a screwdriver.

A properly opened can of paint A properly opened can of paint is much easier to reseal when is much easier to reseal when the job is done. the job is done.

Opening the PaintOpening the Paint

To prevent paint from filling the rim To prevent paint from filling the rim and running down the outside of and running down the outside of the can, use a drill or nail to punch the can, use a drill or nail to punch 3 or 4 holes in the lid groove of the 3 or 4 holes in the lid groove of the paint can to allow the paint to drain paint can to allow the paint to drain back into the can making resealing back into the can making resealing the can much easier. the can much easier.

Reseal the paint lid by tapping it Reseal the paint lid by tapping it into place with a rubber mallet into place with a rubber mallet instead of a hammer. instead of a hammer.

Checking the paintChecking the paint

Lumps and curdling are signs of Lumps and curdling are signs of old spoiled paint. old spoiled paint.

Paint that has been previously Paint that has been previously opened may have a “skin” on opened may have a “skin” on the surface.the surface.

Remove this hardened film. Remove this hardened film.


If pieces of the film fall in the If pieces of the film fall in the paint, filter them out.paint, filter them out.

If the paint is thickened, follow If the paint is thickened, follow the directions of the can to thin the directions of the can to thin the paint. the paint.

New paint can be machine New paint can be machine stirred at the paint store or stirred at the paint store or stirred by the painter. stirred by the painter.

Checking the paintChecking the paint A paint stirring paddle is a piece of A paint stirring paddle is a piece of

wood, approximately the size of a wood, approximately the size of a wooden ruler, used to stir the paint. wooden ruler, used to stir the paint.

A paint stirring bit can be used in a drill A paint stirring bit can be used in a drill to rapidly stir a gallon or 5 gallon to rapidly stir a gallon or 5 gallon container of paint.container of paint.


Proper paint viscosity or Proper paint viscosity or thickness and proper stirring of thickness and proper stirring of paint are essential to achieve a paint are essential to achieve a uniform paint job.uniform paint job.

Selecting brushesSelecting brushes It is impossible to do a quality It is impossible to do a quality

paint job with a cheap, inferior paint job with a cheap, inferior quality paint brush. quality paint brush.

Shoddy brushes can leave paint Shoddy brushes can leave paint streaked brush marks showing, streaked brush marks showing, and loose bristles stuck in the and loose bristles stuck in the paint surface. paint surface. – In addition, poor-quality brushes In addition, poor-quality brushes

will not last as long as good ones.will not last as long as good ones.

Paint BrushesPaint Brushes Good-quality brushes Good-quality brushes

have “flagged” bristle have “flagged” bristle tips. tips.

A flagged bristle is a A flagged bristle is a bristle that is split bristle that is split into three to five into three to five strands. strands. – This flagging helps This flagging helps

bristles retain paint bristles retain paint and spread it more and spread it more uniformly.uniformly.

Bristles should be set Bristles should be set solidly in rubber.solidly in rubber.

Paint BrushesPaint Brushes

The type of paint you select will The type of paint you select will help determine the best type of help determine the best type of bristle to buy. bristle to buy.

Natural bristle brushes, commonly Natural bristle brushes, commonly hog or horse hair, are tough, hog or horse hair, are tough, strong, long wearing, spread strong, long wearing, spread smoothly, and are used for old smoothly, and are used for old base paint. base paint.


Never clean natural bristle Never clean natural bristle brushes with water or use them brushes with water or use them with latex paints. with latex paints.

The water will curl and weaken The water will curl and weaken the bristles. the bristles.


Synthetic bristle brushes, either Synthetic bristle brushes, either polyester or nylon, are man-polyester or nylon, are man-made brushes that offer the made brushes that offer the advantage of being suitable for advantage of being suitable for use with oil base or latex use with oil base or latex paints. paints.


Foam brushes, are a relatively Foam brushes, are a relatively new brush type that can be new brush type that can be purchased usually for less than purchased usually for less than a dollar, used for small jobs, a dollar, used for small jobs, and then thrown away. and then thrown away.

They do not leave brush marks They do not leave brush marks and work especially well for and work especially well for painting metal.painting metal.


After picking the type of bristle, After picking the type of bristle, select a brush that is the right select a brush that is the right size and shape for the job.size and shape for the job.

Large areas should be painted Large areas should be painted with a square-edged 3 to 6 with a square-edged 3 to 6 inches wide wall brush.inches wide wall brush.

Paint BrushesPaint Brushes A varnish brush is a 2 A varnish brush is a 2

to 4inch wide brush to 4inch wide brush with a chisel/tapered with a chisel/tapered shaped end.shaped end.

This shape gives a This shape gives a smooth application smooth application with no lap marks. with no lap marks.

Sash and trim Sash and trim brushes,1 to 2 inches brushes,1 to 2 inches wide, may have a flat wide, may have a flat or beveled edge with or beveled edge with an angular or oval end.an angular or oval end.


Brushes may be kept soft for Brushes may be kept soft for short periods of time by wrapping short periods of time by wrapping them with aluminum foil or them with aluminum foil or plastic wrap.plastic wrap.

Brushes that are to be used the Brushes that are to be used the next day can be kept overnight in next day can be kept overnight in a brush keeper or a zip lock bag. a brush keeper or a zip lock bag.


A brush keeper is a can containing a A brush keeper is a can containing a brush cleaning solution that will brush cleaning solution that will cover the bristles when a brush can cover the bristles when a brush can be suspended into it. be suspended into it.

If the paint job is finished, unload If the paint job is finished, unload your brush on scrap lumber or pieces your brush on scrap lumber or pieces of cardboard. of cardboard.

Soak the brush in the appropriate Soak the brush in the appropriate cleaner for the type of paint you cleaner for the type of paint you used.used.

Rollers, edgers, and paint padsRollers, edgers, and paint pads

Rollers are designed for Rollers are designed for painting large and relatively flat painting large and relatively flat surfaces quickly.surfaces quickly.

Selecting the fabric and nap Selecting the fabric and nap length are based on the type of length are based on the type of paint used and the roughness paint used and the roughness of the surface to be painted. of the surface to be painted.

Rollers, edgers, and paint padsRollers, edgers, and paint pads

Fabric choices are natural or Fabric choices are natural or synthetic. synthetic.

Natural fabric rollers, lamb’s Natural fabric rollers, lamb’s wool or mohair, are only wool or mohair, are only suitable for oil and oil-alkyd suitable for oil and oil-alkyd paints.paints.

Water causes them to come Water causes them to come apart. apart.

Rollers, edgers & paint padsRollers, edgers & paint pads

Synthetic fabric rollers, Dynel or Synthetic fabric rollers, Dynel or Dacron, are popular and Dacron, are popular and versatile because they are versatile because they are inexpensive and can be used inexpensive and can be used with all types of paint. with all types of paint. – Rollers can be purchased as short Rollers can be purchased as short

nap, medium nap, or long nap.nap, medium nap, or long nap.– The rougher the finish the longer The rougher the finish the longer

the nap should be.the nap should be.


Power rollers that use electric Power rollers that use electric power to pump the paint to the power to pump the paint to the roller can be purchased.roller can be purchased.

The amount of paint entering The amount of paint entering the roller from the inside is the roller from the inside is adjustable. adjustable.


Since the roller is not loaded by Since the roller is not loaded by dipping it into a paint pan, time dipping it into a paint pan, time is saved. is saved.

The continuous controlled flow The continuous controlled flow of paint results in a smoother of paint results in a smoother job with less thin spots and job with less thin spots and drips.drips.


Paint pads consist of fabric or Paint pads consist of fabric or filaments attached to a foam or filaments attached to a foam or plastic backing which is attached plastic backing which is attached to a plastic applicator handle in to a plastic applicator handle in various size rectangles. various size rectangles.

Painting with a roller is faster Painting with a roller is faster than painting with a paint pad than painting with a paint pad but pads are less messy. but pads are less messy.

Rollers, edgers & paint padsRollers, edgers & paint pads Small paint pad applicators, some with Small paint pad applicators, some with

adjustable guide wheels, are called adjustable guide wheels, are called edgers. edgers.

Edgers are commonly used when Edgers are commonly used when painting next to the door & window painting next to the door & window frames or where the walls meet the frames or where the walls meet the ceiling.ceiling.

Paint SprayersPaint Sprayers Spraying is a fast, efficient way of Spraying is a fast, efficient way of

applying paint. applying paint. The aerosol can is the simplest way The aerosol can is the simplest way

to spray paint. to spray paint. Spray cans work well for small jobs, Spray cans work well for small jobs,

but are a very expensive source of but are a very expensive source of paint for large jobs. paint for large jobs.

Large spraying jobs are done using Large spraying jobs are done using compressed air or hydraulic compressed air or hydraulic pressure.pressure.

Paint SprayersPaint Sprayers

Conventional compressed air Conventional compressed air sprayers use compressed air to sprayers use compressed air to spray thinned, strained paint. spray thinned, strained paint.

The operator should wear a The operator should wear a mask and work in a well-mask and work in a well-ventilated, well-lighted area.ventilated, well-lighted area.

Paint SprayersPaint Sprayers

If the gun is too far away, the If the gun is too far away, the results are more “overspray” results are more “overspray” (paint particles floating in (paint particles floating in surrounding air) and “dusting” surrounding air) and “dusting” (paint drying before it reaches (paint drying before it reaches the surface to be painted).the surface to be painted).

Paint SprayersPaint SprayersAirless sprayers use hydraulic Airless sprayers use hydraulic

pressure created by an electric pressure created by an electric pump, rather than air pressure, pump, rather than air pressure, to atomize the paint. to atomize the paint.

Instead of thinning the paint and Instead of thinning the paint and making various adjustments, making various adjustments, desired spray patterns and desired spray patterns and coverage rates are achieved by coverage rates are achieved by selecting the appropriate tip.selecting the appropriate tip.

Review/SummaryReview/Summary

What steps do you need to take What steps do you need to take before painting?before painting?

How do you select brushes?How do you select brushes?What are the types of rollers What are the types of rollers

that are made?that are made?What different types of paint What different types of paint

sprayers are there?sprayers are there?

The End!The End!

Lesson 14 Selecting Paint Applicators and Applying Finishes.

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Transcript of Lesson 14 Selecting Paint Applicators and Applying Finishes.