Description
Historical Chinese salt production combined solar evaporation with controlled boiling to concentrate brine and precipitate NaCl crystals.
Technical
The process relied on the NaCl solubility curve, with saturation at ~35 % w/w at 30 °C and ~39 % w/w at 100 °C. By evaporating brine in shallow ponds and then boiling at 100 °C, salt makers reduced water content and promoted crystal growth. Ash addition lowered water activity, aiding purification and removing impurities.
Science
Primary Reaction
Evaporation and boiling of brine to precipitate NaCl crystals
Sensory Profile
Aroma ()
earthymineralsaltybrinysmokyoceanic
Origin & History
Civilization
Ancient Chinese
Era