Nick the PotterSgraffito earthenware

How a piece is made.

Stage 01

Throwing

the form on the wheel

I throw on a kick wheel from a single ball of red earthenware, usually between five and nine kilos for a jug. The form is closed at the shoulder and trimmed the next day once the clay is leather-hard. The handle is pulled separately and joined while both are at the same dryness.

Throwing stage of a piece in progress.
Throwing — a piece partway through the throwing stage.
Detail from the throwing stage.
A closer view.

Stage 02

Slipping

applying the white slip layer

White slip — liquid clay, no different in chemistry from the body — is brushed on in two or three thin coats. It needs to dry just enough to stop being wet but not so much that it can't take a clean cut. There's a window of about half a day in which the carving has to begin.

Slipping stage of a piece in progress.
Slipping — a piece partway through the slipping stage.

Stage 03

Carving

sgraffito; the slow part

This is most of the work. I draw with a fine pin tool, scratching back through the slip to expose the red body. Letters first, then the cartouche, then the foliage. A jug takes between six and nine full days at the bench. Once a line is cut it stays cut.

Carving stage of a piece in progress.
Carving — a piece partway through the carving stage.
Detail from the carving stage.
A closer view.

Stage 04

Drying and bisque firing

the first heat

The carved piece dries slowly under newspaper for a week or more — too quick and it cracks. It then goes into the kiln for the bisque firing at around 1000°C, which leaves the body hard but still porous, ready to take whatever finish I'm using.

Drying and bisque firing stage of a piece in progress.
Drying and bisque firing — a piece partway through the drying and bisque firing stage.

Stage 05

Glaze and final firing

the second heat

Most of my pieces are left unglazed externally — the contrast of red clay against white slip carries the work and a glaze tends to muddy it. I use a thin lead-free clear inside jugs that are intended to hold water. The final firing is at around 1100°C and takes a day to load and a day to fire.

Glaze and final firing stage of a piece in progress.
Glaze and final firing — a piece partway through the glaze and final firing stage.

Most pieces take between three and six weeks from clay to kiln.