What You Need to Know
During dry salting, NaCl draws out moisture by osmosis, lowering water activity to ~0.85–0.90 and inhibiting spoilage organisms. In the subsequent low‑temperature fermentation, lactic acid bacteria convert sugars to lactic acid, dropping the pH to 3.5–4.5 and producing characteristic tangy flavors.
The Science
Primary Reaction
Osmotic dehydration followed by lactic acid fermentation