It was developed in the Cognac region at the beginning of the 16th century.
Thanks to the slowness of its distillation process (about 24 hours to complete the double distillation), the Charentais still can produce a distillate of wine, without impurities, with a quality that other stills can only reach. after 3 or 4 distillations.
The boiler, the capital, the gooseneck and the coil are necessarily made of copper, the fittings / seals are sometimes soldered in brass to avoid the escape of vapors.
The choice of this metal is due to its physical properties (malleability, good conduction of heat) and its chemical reactivity with certain constituents of the wines which make it a catalyst essential to obtain quality eaux-de-vie.