Artisan salt production

Marisol gourmet sea salts are gathered by hand from saltpans in the protected nature reserves of the Ria Formosa and Sapal do Castro Marim on the Atlantic coast of Portugal’s East Algarve.

Natural salt crystallisation, the purity of local Atlantic waters, and a traditional hand harvesting process dating back to Roman times enable us to produce sea salt completely naturally.

Photo gallery

Pictures of our products and our partners’ salt works

Guided tours

Call +351 289 793 601 or email tours@marisol.biz if you would like a guided tour of the saltpans

How traditional saltpans work

Through gravity, sea brine gradually concentrates as it moves through a network of evaporators until salt crystals precipitate naturally in small crystalliser ponds, called saltpans.The system of saltpans used for concentrating Atlantic sea brine in small crystalliser ponds was introduced to the Algarve by the Phoenicians and then perfected by the Romans.

To produce Sal tradicional, the traditional sea salt, fresh Atlantic sea water flows into the evaporators, evaporating gradually in successive ponds, until it reaches a salt concentration of about 220 grams per litre. The sea water is then channelled into small, flat crystalliser ponds. At a concentration of 250-280 grams per litre the salt starts to crystallise, and precipitates over a period of several days, when it is harvested.

After each harvest, new brine is added and new salt crystallises. The process is repeated until the last harvest in the second half of September, before the autumn rains begin to fall.

Marisol traditional salt pans, unchanged sinece roman times

Annual cycle for salt harvesting

Delicate, flaky crystals of Flor de Sal are carefully skimmed from the brine’s surface on a daily basis, during the summer evenings, from June to September. The flower of sea salt is then left to dry naturally by the sun and the wind. We harvest our Flor de Sal and Sal tradicional according to the natural cycle of the year, in order to guarantee quality and taste.

Artisan salt gatherers use hand-crafted, butterfly-shaped sieves - ‘borboletas’ - to skim the flower of sea salt crystals from the water’s surface. The skilled artisans instinctively know when they have skimmed the very best flakes, by the sound the sieve makes.

Traditional sea salt (Sal tradicional) crystallises in the clay bottoms of the saltpans and is gathered by hand every 2-3 weeks using traditional wooden rakes, called ‘rodos’. The naturally white salt is then shaped into piles where it dries in the sun and the wind. This preserves the typical moisture and rich mineral composition of the unrefined sea salt.

Marisol traditional salt sieve - the Borbaleta

Production capacity limits

Marisol believes that the sustainable, natural production of sea salt guarantees its quality.

The production of our superior quality sea salt is limited by weather conditions, manual harvesting, and a desired 1:7 ratio of crystallisation to concentration areas in traditional salt works.

Marisol traditional salt sieve - the Borbaleta

Careful processing and packaging

After skimming, the delicate Flor de Sal crystals are carefully placed in specially designed storage boxes to dry in the sun, and to minimise disturbance to the flakes before final packing. Traditional sea salt is put into large bags before it is transported to our warehouse in Olhão.

At the warehouse, impurities are removed by hand from both the Flor de Sal and the traditional sea salt 'Sal Tradicional', after which the Flor de Sal is packaged. Sal tradicional is milled prior to packing.

Find out more about our processing and food safety innovations 

Our processing and packing complies with legal standards for food safety and preserves our salt's organoleptic qualities (taste, sight, smell, touch).

Marisol salt processing

Photo gallery

Pictures of our products and our partners’ salt works

Guided tours

Call +351 289 793 601 or email tours@marisol.biz if you would like a guided tour of the saltpans