Surface treatments and finishes (AQA GCSE Design and Technology): Flashcards
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Two main purposes of surface treatments
Two main purposes of surface treatments
Enhance visual appeal & provide protection
Three main types of modern paint
Three main types of modern paint
Water-based, solvent-based, oil-based
Reason to move away from solvent/oil paints
Reason to move away from solvent/oil paints
Environmental regulations & health concerns
Polyurethane paint applications
Polyurethane paint applications
Children's toys & frequently used furniture
Why treat knots before painting timber?
Why treat knots before painting timber?
To prevent resin seepage through paint layer
Type of finish varnish provides
Type of finish varnish provides
Transparent finish
Three properties of varnish surface
Three properties of varnish surface
Hard, durable, waterproof
Definition of tanalising
Definition of tanalising
Specialized preservative treatment for external timber
How much longer tanalised wood lasts
How much longer tanalised wood lasts
Up to 15 years longer than untreated
Tanalising solution components
Tanalising solution components
Copper sulphate & mineral salts
What preservatives protect against
What preservatives protect against
Insect damage & decay
How oil treatments work on timber
How oil treatments work on timber
Penetrate deep into grain, create waterproof barrier
Primary purpose of stain treatments
Primary purpose of stain treatments
Change wood colour before other finishes