Klayon Jangseong · Jeollanam-do · Korea

Salt goes in.
Fire decides
the rest.

Korean sea salt, sealed inside a hwangto clay jar and fired for twelve hours. The jar is never opened again — not to sort it, not to bag it. You open it.

0 °F  peak  /  12 hrs

Born from the sea.
Shaped from Korean earth.
Roasted by fire.
Delivered in the very jar that made it.

01  How it's made

One jar, start to finish.

I

It starts in the sea.

On the tidal flats of Korea's southwest coast, the water withdraws twice a day and leaves shallow beds behind. Sun and wind finish the job over weeks, not minutes. What's left is raked by hand.

A hand letting coarse sea salt crystals fall into a woven basket at sunset, the sea behind.
A weathered hand gripping a fistful of raw iron-rich ochre clay.
II

The clay is the vessel, not an ingredient.

Hwangto is the iron-rich ochre earth Korean potters have thrown for a thousand years and built farmhouses from. It is never mixed into the salt.

The naturally porous earthenware creates a roasting environment you cannot get from steel or stone.

III

Every jar is thrown by hand.

Low, round, lidded. Not a container chosen off a shelf to hold a product — a vessel made for one firing, at the size the kiln and the salt require.

A potter's clay-covered hands shaping a round onggi jar on a spinning wheel.
Coarse white sea salt being poured from a wooden scoop into a terracotta onggi jar.
IV

Sea meets earth.

Raw salt goes into the jar. From this moment the salt and the jar are a single object, and nothing will separate them again.

V

Sealed, one at a time.

Paper over the mouth, clay lid on top, by hand, jar after jar. There is no line here and no machine — only the same task repeated until the kiln is full.

Dozens of identical terracotta jars covered with paper and clay lids, a maker sealing them one by one.
A maker standing in silhouette before a glowing kiln stacked with rows of sealed clay jars.
VI

Twelve hours. One climb. No shortcuts.

The sealed jars go into the kiln and stay there. The batch is called by the person who loaded it.

790°C / 1,454°F
  • 0 h sealed
  • 4 h climb
  • 8 h hold
  • 12 h cool
VII

The jar that fired it is the jar you open.

When the kiln cools, the jar isn't emptied. It isn't screened, re-dried, weighed out, or poured into a pouch. It goes into a box exactly as it came out of the fire.

The next person to open it is you.

Two hands lifting the clay lid from a fired onggi jar full of white salt.

02  Proof

Sent to an American lab. Here's everything it found.

A sample was shipped to Eurofins in Des Moines, Iowa — an ISO/IEC 17025:2017 laboratory, A2LA accredited — and tested for heavy metals and composition. Every line of that report is printed below, including the one that isn't a zero.

Eurofins Nutrition Analysis Center · Report AR-26-QD-240620-01
ParameterResultMethod
Heavy metals
Lead (Pb)0.210 mg/kgMwd-ICP-MS
Cadmium (Cd)< 0.1 mg/kgMwd-ICP-MS
Arsenic (As)< 0.1 mg/kgMwd-ICP-MS
Mercury (Hg)< 0.02 mg/kgMwd-ICP-MS
Copper (Cu)< 24 ppmICP
Composition
Sodium36.8 %ICP
Magnesium1.14 %ICP
Sulfur0.69 %ICP-OES
Potassium0.338 %ICP
Calcium0.128 %ICP
Molybdenum0.065 ppmMwd-ICP-MS
Manganese< 13 ppmICP
Selenium< 0.25 ppmMwd-ICP-MS
Iron< 0.005 %ICP
Phosphorus< 0.100 %ICP
pH9.96AOAC 981.12

Lead is the only line that returned a number rather than a limit. We print it, because a report you can only read half of isn't a report. “<” means the element was below what the instrument could measure.

Eurofins Nutrition Analysis Center — 2200 Rittenhouse Street, Des Moines, Iowa. Sample received 7 August 2026, reported 17 August 2026. ISO/IEC 17025:2017, A2LA certificate 2927.01.

After the salt

When the salt is gone, the jar isn't.

Most premium salt ends its life as an empty pouch in the bin. This ends as a fired clay vessel sitting on your counter. Refill it, keep something else in it, or leave it where it is.

Korean kitchens have stored food in onggi for a thousand years — soy, gochujang, grain, kimchi. Yours will hold whatever you decide.

The fired onggi jar open on a wooden table beside a dish, a hand scattering salt.
A maker sealing rows of clay jars by hand in the workshop.

The makers

Samson Food has been firing salt in Jangseong since 2009.

A small operation in Bukha-myeon, run by Yang Soon-ok. It is a certified women-owned business and, since 2026, a certified social enterprise — which in Korea means the state has verified that creating the jobs is the point, not a by-product of them.

If a jar cracks or the grain comes out wrong, it doesn't ship. That's the entire quality system.

Fired in the jar. Shipped in the jar.

One kiln load at a time. Batch size is limited by what the kiln holds.