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|REVISION CARDS - ABRASIVES, WOOD DYE AND STAIN|
|V.Ryan © 2018|
|PDF FILE - CLICK HERE FOR PRINTABLE WORKSHEET|
|SANDING / GLASS PAPERING - NATURAL WOOD
Different grades of glass paper are used, to produce a blemish free and smooth finish.
Glass paper is often referred to as sand paper. There are other abrasive sheets including aluminium oxide, silicon carbide and garnet. Use a coarse abrasive, followed by medium and then fine, when preparing a surface
Varnish is supplied as water based or oil based. Water based varnish is an environmentally friendly version of the oil based varnish.
Polyurethane Varnish and Yacht Varnish, give a quality, protective finish.
Varnish is UV resistant, protects the surface of the wood and helps prevent cracking and shrinking. It can be purchased as a matt, silk or gloss finish.
Varnish is applied by brush or spray gun
|WOOD DYE AND STAIN
Varnish puts a layer on the surface of the wood. Dyes / stains, penetrate the surface fibres. Dyes/stains are water or solvent based. They need a further finish such as varnish (matt, silk, gloss) or wax, to protect the surface.
Dyes and stains are supplied in a range of vibrant colours or wood based tones. Most can be thinned and mixed, to achieve the required colour/shade.
They are applied with a paint brush, a soft cloth or even a paint pad.
|STAIN AS A FINISH
|1. How is glass paper / abrasive paper classified? 4 marks|
|2. How does varnish differ from wood dye? 4 marks|
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