Design and Technology- Graphics materials notes

Topics: Plastic / Pages: 11 (2600 words) / Published: Mar 22nd, 2014
Different types of materials

• Paper and Board
Anything over 200g/m2 is considered a board. Corrugated card has two or more layers of card with a fluted inner section. This adds thickness and strength with very little increase in weight. Used for packaging objects which need protection during transportation. Cartridge paper / Photocopy paper is used for design drawings, sketches and good quality marker pen presentations. The surface is good for pencils, pens and markers, and is soft enough to be used for crayons, pastels, colors and inks. Layout paper (Detail paper) is a thin, fairly transparent white paper which provides a cheap medium for designers to visualize an object or design. Use in preparation of final designs to trace images. Bleed Proof paper has similar qualities to cartridge paper but is good at isolating water based paints and pens so they don't run into areas where you don't want them. Used in high quality presentations. Cardboard is a cheap, recyclable and stiff board with a good surface to print onto. Used for packaging, boxes and cartons. White board is good for packaging and book covers. It is strong, and the surface has been bleached to allow for printing. Duplex Board is used mainly in food packaging, as recycled materials cannot be used for this purpose. It is also less expensive than white board, and provides a different texture for printing. Grey Board is used in schools for model making and for book making. The surface is stiff and reliable.

• Plastics
-Plastics are manufactured through a process known as polymerization.
Polymerization occurs when monomers join together and form long chains, known as polymers.
Thermoplastics and Thermosetting Plastics are the two different types of plastics.

Additives can be added to both thermoplastics and thermosetting plastics to change the qualities. Stabilizers prevent moisture or UV light from affecting the surface. Lubricants are sulfides and waxes that make the

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