Definition of seasoning:
Seasoning is process by which moisture content in freshly cut tree is reduced to a suitable level.
Artificial seasoning:
1.Boiling – In this method timber is immersed in water and then water is boiled for 3 to 4 hours. Then it is dried slowly. This process is process very quick but expensive.
2. Kiln seasoning: in this method the seasoned timber is placed inside the kiln. Then fully saturated air with a temperature 350 C to 380 C is forced in the kiln. This method is used for seasoning for larger scale.
3.Chemical : An aquaen solution of certain chemicals have lower vapor pressure than pure water. Timber is treated with such chemicals. Chemically treated timber will exhibit fewer defects. Common salt is generally used.
4. Electric: In this method high frequency alternate electric current is passed through timber. Resistance to electric current is low when the moisture content in timber is high.
This technique has been tried in some plywood industries but not in seasoning of timber on mass scale.