Rah Flashcards
Name 4 hard woods
- beech
- Oak
- ASH
- Teak
Name 2 soft wood
Scots pine and Douglas fir
Name 4 types of man made boards
- chipboard
- MDF
- Plywood
- Flexi ply and Aero ply
What can be used to protect a wood used outdoors
Varnish
What makes beech useful and how can it be used
It’s strong, durable and non abrasive
Short grain meaning knot free
Kitchen products, flooring
What makes oak useful and how can it be used
Durable and strong.
Long grain so knots and is very abrasive so it used indoors as furniture
What makes ASH useful and how can it be used
Flexible and durable
Can be used outdoors
Used for hammers as it’s flexible
What makes teak useful and how can it be used
Can last a lifetime outside without treatment however not fsc
What can stick anything
Epoxy resin - glue also isn’t effected by heat and sticks hard materials
Properties of pva
18h dry time
Soaks into porous materials
What uses melted plastic poured into a ‘die’
Die casting
What is vacuum forming
Sheet of thermoplastic heated goes soft
Mould lifted close and air is sucked up making it shape
What is injection moulding
Similar to casting, but molten material is forced into a ‘closed mould’ under pressure. Often built in heaters and it is a industrial process which is automatic and continuous
What is extrusion
Melted and forced under pressure through a die
Produces long, continuous strips. Eg plastic covered wires and plastic edgings
Why are smart colours
Thermochromic pigments - react to change in temperature
Photochromic pigments - react to changes in light levels (sunglasses)
