Thirteen Years with Wild Clay: The Physics of Surrender at the Wheel

Most pottery students begin their education with fifty-pound bags of commercially bagged stoneware purchased from art supply distributors. That clay has been pulverized, filter-pressed, de-aired in an industrial vacuum pugmill, and chemically standardized with bentonite and feldspar until it behaves with predictable, obedient docility. It is clay stripped of geography.

Thirteen years ago, after walking along a cutbank of the Saône river after a spring flood, I spotted a vein of greasy, blue-grey mud exposed beneath the willow roots. I filled two five-gallon buckets with a spade, carried them back to my studio in Lyon, and began a messy, humbling apprenticeship that cured me of artistic vanity forever.

The Labor of Levigation

You cannot simply throw wild earth onto a potter's wheel. If you try, the sharp gravel will slice your palms to ribbons, and pockets of trapped organic humus will ferment and explode in the kiln. Preparing wild clay is an exercise in archaic geology.

First, the dug clay must be dried completely in the sun until it forms brittle biscuits. Then it is submerged in water—a process called slaking—where the dry lumps dissolve with a whispering hiss into a thick slurry. I pass this slurry through three graduated sieves: first a thirty-mesh screen to catch pebbles and rootlets, then an eighty-mesh screen to remove coarse river sand, and finally a hundred-mesh brass wire cloth.

“What settles in the settling troughs is not just silica and alumina; it is the sediment of an entire watershed: microscopic traces of decomposed limestone, iron oxide nodules, and mica flakes ground down by Alpine glaciers during the Pleistocene.”

Throwing on a Momentum Kick Wheel

I do not use an electric wheel. Electric wheels provide constant, unyielding torque at the touch of a foot pedal, encouraging the potter to treat clay as an inert medium to be bullied into shape. I work on an unmotorized wooden Leach kick wheel with a heavy concrete flywheel beneath the bench.

To keep the wheel spinning, you must rhythmically kick the flywheel with your left heel, accumulating rotational kinetic energy in the heavy stone disc. The torque is not infinite; if you press into the clay too aggressively or off-center, the flywheel immediately slows and stalls. The machine forces you into a bodily rhythm: kick, breathe, center, lift.

Wild clay has a very narrow moisture window. Because it lacks commercial plasticizers, it will collapse into slurry if you use too much water, and it will tear along grain lines if you work it dry. You cannot impose a predetermined blueprint on wild clay. You must feel where the iron nodules are, where the silt pockets resist compression, and adjust your wall thickness accordingly.

The Wood-Fired Kiln: Relinquishing Control

The ultimate test of wild clay takes place in our three-chamber wood-fired climbing kiln (an anagama) in the Beaujolais hills. For four days and three nights, my colleagues and I stoke the fireboxes with seasoned pine and oak offcuts in round-the-clock shifts.

Inside the kiln, temperatures reach 2,350 degrees Fahrenheit. The pine wood does not simply heat the pots; the airborne fly ash settles directly onto the unglazed raw clay shoulders, melts into a natural olive-green feldspathic glass, and runs down the belly of the vessels in tears. Every flame path leaves a scorch mark; every drop of melted ash records the draft of the wind over the chimney at three o'clock in the morning.

When we unbrick the kiln door a week later, half the pieces are often cracked or warped. But the pieces that survive possess a rugged, primeval beauty that no factory could ever manufacture. They do not look like objects designed by a human ego; they look like stones lifted from the riverbed that have passed through fire and remembered who they were.