Salt has always been a precious resource for all communities, it has been an esteemed commodity, a method for food preservation and an accompaniment for food preparation.

But how is sodium chloride (table salt) manufactured? Salt is abundant in some natural resources such as seawater.

The most ancient method for extraction of this element is solar evaporation of the seawater collected in special ponds called Salinas (seawater salt mines). This is typical of sunny Mediterranean countries but salt can also be extracted in its solid form from regular salt mines on dry land: salt deposits in the form of large blocks are dug out and ground for commercial use.