Lumber is not always a perfect and straight piece. There are defects and those defects are natural. These defects are not really bad. Most woodworkers are fine with defects on the chosen Koa wood for sale because they contribute a unique character to your final product. It will make the final product better-looking.
However, you have to remember that the defects should be kept at a minimum. If there are too many defects on one piece, that defies the purpose of bringing a unique characteristic to your final product. It will also affect the appearance of the product. Here are those defects that you have to pay attention to when checking the lumber.
Bow. It is easy to identify whether a piece of lumber has a bow or not. This is a defect that takes on an appearance similar to a bow, after all. To determine a bow on the piece of lumber, you will need to find those warps on the board’s face. Usually, it will span from one end to another.
Cup. It is only normal for woodworkers to pay attention to the cup on the face of the board. This is usually characterized as a hollow element on the board. If a woodworker can take note of the hollow element on the face of the board, this will certainly be helpful in putting a good appearance on your final product.
Crook. Having a crook on the face of the board will give the final product you are making a good shape. You just need to find those crooks. The crooks are basically a warp along the edges, the complete opposite of the bow which warps from edge to edge. The said defect is commonly known as a crown.
Knot and knothole. Another defect that you have to pay attention to is the knot and knothole. If the knot is tight, then that is not a problem at all. What you have to be wary about is the dead or loose knot that is surrounded by dark rings. They may fall out. In the worst case, it might have already left the hole.
Split. This defect is commonly described as an obvious crack that basically goes all the way through the inspected piece of lumber. You can commonly find these obvious cracks at the ends of the lumber. Make sure that the splits you find on your inspected piece of lumber does not cause any bad effects or does not make the piece of lumber useless.
Cracks. When you talk about splits, you should also take note of the actual cracks. The difference between the actual cracks from the split is that the former can be found along the lumber’s annual growth rings. The actual cracks does not pass through the lumber’s entire thickness. You will find it useful in some woodwork.
Shake. The shake is one of those defects that can actually be found in growth rings area. Generally, you can find the shake as a separation of the grain between the growth rings. It often extends along the face of the board. Sometimes, it goes beyond the surface as well.