Quartersawing

Quartersawing is a method of cutting logs into lumber. In this process, a log is first cut in half lengthwise. Then, each half is cut in half again, creating four quarters. These quarters are then further cut into boards, typically at an angle of 90 degrees to the growth rings. This angle results in the rings appearing on the face of the board at an angle greater than 45 degrees, often around 60 to 90 degrees.

The primary advantage of quartersawing is the stability it imparts to the lumber. Boards cut this way are less prone to cupping, shrinking, and swelling compared to lumber cut by other methods, such as plainsawing. This increased stability makes quartersawn lumber desirable for applications where dimensional accuracy is important, such as flooring, cabinetry, and musical instruments.

However, quartersawing is a less efficient milling process. It yields less lumber from a given log compared to plainsawing. The process also requires more saw kerf, meaning more wood is lost as sawdust. Due to the increased yield and labor involved, quartersawn lumber is generally more expensive than plainsawn lumber. Visually, quartersawn lumber exhibits a distinct grain pattern, often referred to as "ray fleck" or "medullary rays," which can be aesthetically pleasing.