Cork is made from the bark of a tree, Quercus suber, or the cork oak. These trees can grow pretty big, and they have really thick, rugged bark.
12 Compound agglomerated, or composition, cork is made by uniformly coating the cork granules with a thin layer of an additional adhesive agent. The coated granules are pressed into a mold and slowly heated (the temperature varies, depending on the adhesive used).
Is cork a natural product?
If you ever wondered how cork came into being, let us put you at ease. It most definitely is a 100% natural, organic material composed of the bark of the cork oak tree.