Flat oud occurs on the outside of the trunk, which means the part near the bark.
The reason for this area's flat oud being present is that in nature, the bark of the sedimentary tree may have been peeled off by some physical agent, accidentally exposing the flesh of the plant to the agents and the oud in that area.
The shape of the flat oud is the thin layers that overlap near the outer layer of the tree.
Now, there are almost no natural flat oud and most of the flat are very thin, so they only make incense, agar wood incense, and cigarettes.
Flat oud chip is common because it can be cultivated and exploited by implantation methods
People will peel off the outer bark of the oud tree, then scan the oud-forming compound outside the tree.
Over the course of several years, the outer body of the tree will rot and be rough, and a thin layer of oud oil will be formed inside that layer.
Exploitation of that paste by grinding and removing layers of wood that are free of oil, you will get thin tiles.
The flat oud is good for the quality of oil, it is lightly plucked to black and submerged.