Timbers, Papers and Boards - DT - OCR - GCSE
- Created by: Dav
- Created on: 01-12-20 23:00
Timbers
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Softwoods - shorter growing time from coniferous forests
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Cedar - Chemical makes it resistant to weather. For outdoor furniture
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Scots Pine - easy to work with, lots of knots. For furniture, construction
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Larch - tough, strong, easy to work with. Prone to split. For decking, cladding
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Spruce - good strength to weight ratio, small knots. For construction
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Hardwoods - longer time to grow from deciduous forests
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Beech - hard tough,warps easily, straight grain. For floors, furniture
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Oak - durable and hard, generally open grain. For floors barrels
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Mahogany - strong, resistant to ro, fine grain. For fine furniture, instruments
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Balsa - good strength to weight ratio. For surfboards, aircraft models
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Manufactured board - made from cuts of wood to get specialised properties/ price
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MDF - Denser, hazardous dust, smooth surface. For flat packed furniture
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Plywood - Strong in all directions, slightly flexible. For skateboards
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Chipboard - rough surface so veneers used. For low cost projects
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Finishes
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Painting - sanded first, long time to drive. Added protection
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Varnishing - instead of covering attractive grain
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Tanalising - preservative added to outside of the wood. Prevents decay
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Papers and boards
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Paper is classified based on their weight in grams per square meter. Anything under 200gsm is considered paper and anything above is considered a board
Name
Properties
Uses
Bleed-proof paper
Smooth and thick prevents ink from seeping
Quality presentational drawings
Cartridge
Creamy white paper, with lightly texture surface
Drawings and paintings
Grid paper
White paper with isometric lines or squares
Scale drawings, quick sketches
Layout paper
Thin, slightly transparent with smooth surface
General design work and tracing
Tracing paper
Thin transparent paper
Copying and tracing.
Name
Properties
Uses
Corrugated card
2+ layers of card with fluted layer to add strength
Boxes…
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