Wood Moisture Content
Moisture content refers to the amount of water present within wood. It is expressed as a percentage of the dry weight of the wood. When wood is freshly cut or green, it typically has a high moisture content. As wood dries, it loses moisture and its moisture content decreases.
How Dry Should Wood Be Before Turning?
The ideal moisture content for turning wood depends on the type of wood and the desired result. In general, wood should be dried to a moisture content of 6%-10% before turning. This range ensures that the wood is stable and less likely to warp or crack during the turning process.
However, some experienced turners may prefer to turn wood at higher moisture contents, such as 12%-15%. This can result in a smoother finish and reduce the risk of tear-out, but the wood may be less stable and require additional drying time after turning.
Moisture Mapping
Moisture mapping is a technique used to determine the moisture content distribution within a piece of wood. It is typically done using a moisture meter, which measures the electrical resistance of the wood. The higher the electrical resistance, the drier the wood.
Moisture mapping can help identify areas of high moisture content that may need additional drying time. It can also help ensure that the wood has reached a uniform moisture content throughout, which is important for stability and reducing the risk of warping or cracking.
By understanding wood moisture content and following proper drying techniques, turners can improve the quality and longevity of their turned pieces.