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Cab 4 Test 5 > Wood Finishing Applications > Flashcards

Wood Finishing Applications Flashcards

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1
Q

Oil stains are divided into Two types what are they

A

Penetrating Oil

Pigment Oil

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2
Q

How do you apply Oil stains

A

Manually by brushing or wiping.

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3
Q

How does Penetrating Oil and Pigment Oil get there colour

A

Pen Oil-Soluble aniline dyes
Pig Oil- Non soluble pigments (Earths)

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4
Q

When might you consider using a NGR Stain

A

If you want to top coat right away they dry immediately

If you need to stain over other finishes to even out colour or reduce contrast.

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5
Q

What happens to NGR Stains in sunlight

A

They may fade

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6
Q

If there is solvent present in a top coat it may cause a NGR stain to?

A

May cause NGR Stains to bleed

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7
Q

What do NGR stains use as a vehicle

A

Alcohol and other solvents

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8
Q

Basic Description of natural varnish?

A

Transparent, Hard, protective finish

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9
Q

When would you choose a varnish

A

When a Durable finish is required

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10
Q

What is a Natural Varnish a combination of ?

A

Drying Oil (Typically Linseed Oil)
Resin (Natural Resin or Gum such as Shellac)
Solvent (Turpentine or paint thinner)

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11
Q

What’s the drying like for varnish

A

Some are slow some are faster drying and some are completely waterproof

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12
Q

Types of synthetic topcoats?

A

Varnish

Polyester

Polyurethane

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13
Q

Most durable top coat?

A

Varnish

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14
Q

Describe what a polyester finish on wood is like?

A

Exceptionally hard and Durable clear finish.

Very high gloss and look wet

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15
Q

What do polyester finishes consist of?

A

Liquid finish mixed with a catalyst and many types are meant to be warmed before spraying.

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16
Q

Polyester Pot life

A

15 - 20 minutes

17
Q

Types of spraying equipment

A

Conventional

Airless

Air assisted airless

High Vol Low Pressure HVLP

18
Q

How is fluid delivered in an airless spray gun

A

They a piston or pump to deliver fluid to the spray gun tip

Atomized by forcing it through a small tip at high-pressure

19
Q

What are airless guns more commonly used for

A

Painting rather than for applying clear finishes

20
Q

Would you use an airless for a clear finish?

A

Not ideal

21
Q

Airless guns are suited for fine finishing?

A

No
To much product is delivered and particles are to large

22
Q

What do Air-Assisted airless systems combine

A

Features of conventional and airless systems

23
Q

Transfer efficiency higher in air-assisted airless then conventional?

A

Yes

24
Q

First step in surface prep

A

Surface evaluation
Use light to identify deficiencies
Incandescent light is superior to fluorescent light for inspection.

25
Q

How do you identify invisible contaminates such as glue and scratches?

A

Mineral spirits
brush on

26
Q

Types of Stains

A

Water
Oil
Alcohol (NGR)

27
Q

Pros and Cons of water stains

A

Pros:
Brilliantly colored
Non fading
Deep penetrating
Clear tone

Cons:
Raise Grain
Difficult to apply evenly

28
Q

Before staining what should be done with end grain

A

Wipe a coat of clear stain base or stain conditioner

Minimizes absorption of the stain into the porous area.

29
Q

What is bleach in wood used for?

A

Remove stain defects
Lighten wood

30
Q

Types of bleach Available?

A

Oxalic Acid
Chlorine (Calcium Hypochlorite and Sodium Hypochlorite)
Sodium Hydroxide and Hydrogen Peroxide

31
Q

Commercial wood bleach kits are a combination of?

A

Sodium Hydroxide and Hydrogen peroxide

32
Q

Application procedure for bleach?

A

Fiber bristled brush working bottom to top to minimize potential for streaks.

33
Q

Name the spray guns label top to bottom left to right p

A

Air Spray
Airless
HVLP
Air-Assited airless

34
Q

What defect is being shown in this photo

A

Fish eye

Cab 4 Test 5 (4 decks)

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