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IGCSE AQA Design and Technology
Unit 3
Surface Treatments and Finishes
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Eleanor Rumpf
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Surface treatments help protect against:
Weather
,
Scratches
,
Moisture
,
Insects
,
Fungus
and
UV
(WSMIFU)
Surface treatments also help with
aesthetics
Wood stains
enhance
colours
Painting in different
colours
to customers
tastes
Tanalising:
preservatives
added to
timber
Preservative is pumped under
pressure
, forcing the preservative liquid to
penetrate
the
outer cells
of the timber
Tanalising can help extend wood life for
decades
→
Delay
rotting process
→ Protect against
insect
and
fungal
attack