What is cork?

Cork is a 100% natural plant tissue, from the bark of the cork tree (Quercus Suber L). The tree can live up to 200 years, during which time it may be harvested 15 to 18 times.

The process of natural cork extraction is called harvesting, a highly specialized process that does not harm the tree. The cork tree is the only oak species whose bark regenerates itself after each harvest.

The bark consists of a honeycomb of microscopic cells filled with an air-like gas and coated mainly with suberin and lignin.

Other compounds are identified in its chemical composition, although in less quantity, such as polysaccharides, ceroids and tannins.
A single cubic centimetre of cork contains almost 40 million cells – around 800 million in a single natural cork stopper.