Cork is an impermeable buoyant material, a prime-subset of bark tissue that is harvested for commercial use primarily from Quercus suber (the Cork Oak), which is endemic to southwest Europe and north west Africa. Cork is composed of suberin, a hydrophobic substance, and because of its impermeable, buoyant, elastic,
and fire retardant properties, it is used in a variety of products, the most
common of which is for wine
stoppers. The montado landscape of Portugal produces approximately 50% of cork harvested annually
worldwide, with Corticeira Amorim being
the leading company in the industry. Cork
was examined microscopically by Robert
Hooke, which led to his discovery and
naming of the cell.
So, why does the cork oak have a thicker layer
of cork bark than other trees? The tree evolved to protect itself from the
harsh conditions of the forests near the Mediterranean. These forests
experience frequent droughts, brush fires and temperature fluctuations. Cork is
actually made of water-resistant cells that separate the outer bark from the delicate
interior bark. It has a unique set of properties not found in any other
naturally existing material. It is lightweight, rot resistant, fire resistant,
termite resistant, impermeable to gas and liquid, soft and buoyant. It's these
properties that make it ideal for stopping wine bottles and tile flooring.
Let's take a look at how cork gets stripped from the tree and processed into
consumer products
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