TECHNICAL MATERIALS

TECHNICAL MATERIALS

1. RAW MATERIALS

   • WOOL
   • TREE TRUNKS
   • SAND

2. NARURAL MATERIALS

   • PLASTIC
   • GLASS
   • TEXTILES

3. PROCESSED MATERIALS

   • THEY CAN BE NATURAL AND PROCESSED
     • METALS
     • WOODS
     • CONSTRUCTION MATERIALS

4. CHOOSING MATERIALS

   • STRONG
   • LIGHTWEIGHT
   • NON-TOXIC
   • ATRACTIVE LOOKING
   • BASIC PROPERTIES
     • COLOUR
     • FEEL
     • TEXTURE
     • BRIGHTNESS
     • TRANSPARENCY
     • MECHANICAL PROPERTIES
       • HARD/SOFT
       • THOUGH/BRITTLE
       • ELASTIC/PLASTIC
       • MALLEABLE

5. WOOD

   • TYPES OF WOOOD
     • SOFTWOODS
       • UNIFORM QUALITY
     • HARDWOODS
       • BETTER QUALITI FINISH
   • WOOD PRODUCTS
     • PLYWOOD
     • CHIPBOARD
     • PAPER
     • CARDBOARD
     • CORK
   • HOW WE OBTAIN WOOD?
     • 1-FELLING
     • 2-DEBARKING
     • 3-TRANSPORT TO THE SAWMILL
     • 4-SAWING FOR END USE
     • 5-DRYING
     • 6-CLEANING, PLANING AND SANDING
     • 7-TREATMENTS AND FINISHES

6. METALS

   • CLASSIFYING METALS
     • NON-FERROUS METALS
       • COPPER
       • TIN
       • ALUMINIUM
       • ZINC
     • FERROUS METALS
       • IRON
       • STEEL
       • CAST IRON