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Seaweed kilns

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Seaweed kilns are trenches dug in the ground, between 5 and 10 metres long and completely  lined with flat stones, fixed together with clay. The kilns were divided into compartments in which dried seaweed was burnt. After burning, each compartment held a 50kg block of soda which was sold to chemical factories.

1 tonne of seaweed was needed to produce a 50kg block of soda, which after processing yielded 1kg of iodine.

There are still plenty of seaweed kilns to be seen today along the coast of Pouldreuzic and Plozévet. More details.

More in this category: « Arts and crafts

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