We are currently undergoing maintainence, please come back soon. We are currently undergoing maintainence, please come back soon. When the drying is done in a kiln, the product is known as kiln-dried timber or lumber, whereas air drying is the more traditional method.
Woodworking when wood is used as a construction material, whether as a structural support in a building or in woodworking objects, it will absorb or desorb moisture until it is in equilibrium with its surroundings. For some purposes, wood is not dried at all, and is used green. Often, wood must be in equilibrium with the air outside, as for construction wood, or the air indoors, as for wooden furniture. Usually the wood is sawn before drying, but sometimes the log is dried whole.
Case hardening describes lumber or timber that has been dried too rapidly. When this shell is at a low moisture content it will ‘set’ and resist shrinkage. The core of the wood is still at a higher moisture content. This core will then begin to dry and shrink. However, any shrinkage is resisted by the already ‘set’ shell.