CLICK HERE FOR INDEX PAGE
 
REVISION CARDS - GENERAL PREPARATION OF NATURAL WOODS
V.Ryan © 2018
 
PDF FILE - CLICK HERE FOR PRINTABLE WORKSHEET
 

WHY IS A FINISH APPLIED TO WOOD?



1. A good quality finish such as varnish, offers a level protection to the surface of the wood.
2. A finish will enhance the natural grain, lifting the perceived value of the product.
3. Preservation of wood is another reason for applying a finish, lengthening the lifespan of the piece of furniture / product.
4. A dye applied as a finish, will change the ‘colour’ of the wood, giving the illusion that ‘cheap’ pine is actually more expensive mahogany.
5. A finish will provide a gloss, matt or silk finish, depending on preference of the customer.

  INITIAL PREPARATION

Filling cracks - PVA or cascamite mixed with wood dust producing a paste, which is then applied to cracks and gaps.

Premixed wood fillers are also available, as powders to be mixed with water or applied straight from a tube.

Shellac - Supplied in stick form, in various shades. It is melted into holes / cracks in the wood with a soldering iron and then levelled, usually with a chisel.

Wax sticks - useful when repairing scratches, nail holes or cracks. The stick is warmed up and when soft, pressed into the hole / crack. The surface is then levelled with glass paper.


 
 
 
GENERAL WOOD FILLERS



 

SHELLAC


HEAT UP SHELLAC STICK AND APPLY TO CRACK

 

LEVEL USING A CHISEL

 

 


GLASSPAPER TO A SMOOTH FINISH

 
 
 
QUESTIONS
 
1. Why is a finish applied to the surface of natural wood? 4 marks
 
 
 
 
2. How are shellac and wax sticks used? 4 marks
 
 
 
 
 
 
 
CLICK HERE FOR RESISTANT MATERIALS INDEX PAGE
 
 
Google
 
Web www.technologystudent.com