Cork screwed report
Cork oak landscapes also contribute to store carbon, reducing greenhouse gases in
the atmosphere.

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The cork oak

The cork oak - Quercus Suber L - appeared more than 60 million years ago, in the Western Mediterranean .
Man quickly learned how to extract, work and use the renewable bark of this noble species.

The exploration of this resource is an excellent example of the relationship between Man and Earth, and the respect for the ecological model.

Cork , the bark of the cork oak, is a vegetative material, composed of micro cells, which are generally of polyhedric form. The intercellular spaces are filled with a gas composition, identical to that of air.

The special characteristics of cork and its multiple applications are due to the honeycomb structure and the nature of the cellular membranes.

Lightweight, resistant to wear, impermeable, elastic but of stable size, cork has a perfect capacity for heat insulation and vibration dampening.

It has been used in the manufacture of many products, for thousands of years.

The work of cork

The barking season lasts from July, through to September.
Boards of bark are detached with great care, ensuring that the phellogenic base is not affected.
This layer not only produces the cells, but also works on the reconstitution of the bark of the cork oak.
By law, the first stripping of cork of young trees can only be carried out when the perimeter of the trunk reaches 70 cm and it is at least 25 years old.
The cork obtained from the first stripping is called "male cork".
It is used for the making floor tiles, pin-boards, etc.
The barking of a cork oak can only be carried out every 9 years.
At the time of the second remo val ( secundeira), cork is still not yet ready to be made into stoppers. "female cork", i.e. ripe and perfect cork for the wine stopper , will not be detached for another 9 years.
Therefore, the cork oak must mature for at least 43 years before it can produce cork for wine stoppers.


The turning point for the cork industry took place in the second half of the XVIIe century.

The galleons of XVIe century, who ventured into unexplored seas, were known as "the cork galleons", so large was the quantity of bonds, benches, trunks, bowls, mess tins, shoes and other objects carved from cork bark.

It was D. Pierre Pérignon, head wine waiter at the abbey of Hautvillers, who first adopted cork as a stopper for the sparkling wine bottles of the Champagne area.

The cork stopper then flourished with its incomparable capacity to preserve the quality of wine.

Chemical composition

45% Suberin : a complex fatty acid, and the principal component of cork, responsible for its elasticity.

27% Lignin : An integral part of the cell walls of Cork .

12% Polysaccharides : The part contributing to the texture of cork.

6% Tanins : Determining its characteristic colour.

5% Céroïdes : The hydrophobic part which helps to ensure its impermeability.

5% Various : Minerals, water, glycerin and other



This chapter is intended to give you a better understanding of how to use SEACORK®