Board

The quality of the boards depends on the quality of the tree, the quality of your saw, and your carpentry skill level.

How to Acquire
Right click on a log while having either a saw or bone saw equipped and the option "Make Boards" appears. A bone saw makes only 4 boards, while a metal saw makes 6. However, it is often easier to get a high quality bonesaw than it is to get an equal quality metal saw, so sometimes a bone saw is still desirable when you want quality boards.

Your Carpentry skill acts as a softcap for board quality. The formula for board quality is as follows:

Qn = $$\sqrt{sawql * lumberql}$$

and

if (Carpentry > Qn) then BoardQuality = Qn

if (Carpentry < Qn) then BoardQuality = (Qn + Carpentry) / 2