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a) Describe with the aid of sketches the difference between laminboard and blackboard.
b) State the available board sizes and a range of thicknesses for the boards above.
a) Describe with the aid of sketches the difference between laminboard and blackboard.
Blockboard
Traditionally blockboard had birch faced veneers with softwood core. the core strips were 25mm wide. this made a very usable board. Although if the core strips distorted with shrinkage then these pulled the face veneers and made a slight rippling effect on the face that showed if the board was veneered and polished.
Eastern blockboard
A modern - less expensive - replacement for traditional blockboard made from far eastern timbers with laminated cores up to 75mm wide.
Lamin Board
Similar to traditional blockboard but the core strips are smaller maximum 7mm wide (laminated strips). These strips shrink less and do not distort the face of the panel with ripples so are lamin board makes a better substrate for veneering work.
b) State the available board sizes and a range of thicknesses for the boards above.
The Wood Panel Industry Federation state that these timber based boards are to order in thicknesses ranging
from 1.5mm to 40mm or greater but the most commonly
available nominal thicknesses generally held in stock in
the UK will be:
3mm, 4mm, 6mm, 9mm, 12mm, 15mm, 18mm, 22mm,
25mm, 32mm.
Common panel sizes are:
2440mm × 1220mm
2440mm × 610mm (normally T&G)
2500mm × 1220mm
3050mm × 1525mm
3050mm × 1220mm
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