DT Revision

Metals

Stainless Steel

Brass

Tough

Resists wear

Corrosion resistant

Corrosion resistant

Good conductor

Polishes well

65% copper, 35% Zinc

Acrylic

Properties

Easily cleaned

Food safe

Easily finished

Tough

Easily scratched

Common uses

Shop signs

Rear car lights

Baths

Fish tanks

Menu holders

Advantages

Disadvantages

Widely available

Can be shaped using heat

Does not need painting

Breaks easily if dropped

Green designs

Carbon footprint

How to reduce

Using renewable energy

Maximising energy efficiency

Analysing their supply chain

Recycling

Identifying carbon offset methods

Considerations

Reducing waste or using less materials

Designing for energy efficiency in the use of the product

Using biodegradable materials

Using more non-toxic recyclable materials or reusable components

Using renewable energy sources or more efficient energy sources

Timbers

Sustainability

Forest Stewardship Council

Deforestation

Habitat destruction and loss

Processing

Transportation

Wastage

Pollution

If timber from sustainable sources is used, it does less damage to the environment.

Social footprint

Impact of logging on communities - can be good and bad

Recycling and diposal

Trend forecasting

Genetic engineering

Make tree grow faster

We do not know enough about the long-term effects of release genetically engineered plants into the environment.

Make tree resistant to diseases

Change DNA of a tree

Manufacturing Processes

Routing

Sawing

Mortiser

Rotating cutter

Makes a square hole for mortise and tenon joint

Circular saw

Bandsaw

Bag press

A mould and laminates are put inside

The air is then sucked out of it

The laminates are forced into the mould and held while the glue dries