Bone-china kiln ledger · cone 6

Watch the cone bend.

Saggar is a firing ledger for studio potters. One curve, climbing through quartz to a single coral soak — then a slow seafoam cool the glaze can settle into.

peak 1222°C soak 12 min atmosphere oxidation cool slow · crystal

The signature · one ridgeline

A firing reads as one curve, not a wall of widgets.

Saggar lays the whole firing along a single temperature ridge that climbs, soaks, and falls. The curve is the page; the phases are just where you stand on it.

Candle
110°C
Doors cracked; last water driven off.
Climb
880°C
A steady ramp through the quartz inversion.
Soak — the decision
1222°C
Cone 6 slumps. Hold twelve minutes. Once.
Cool — settled
160°C
A slow descent so crystals can grow.

The recipe book

Every batch, kept as a ledger of parts.

Glazes live as honest line-item recipes — feldspar, silica, whiting — with one decision wearing the colour and the rest staying clay-neutral until they matter.

One soak

The single coral moment

Coral is spent exactly once per firing — on the soak where the cone bends. No coloured rails, no confetti, no rainbow status.

Set in porcelain

Numbers fired in serif

Temperatures and parts are set in a display serif so a reading carries the weight of a fired mark, never a thin spreadsheet cell.

Clay ground

Warm bone, not cold white

The whole ledger sits on a toasted bone-clay ground; porcelain slabs lift above a recessed well, the way ware sits in a saggar.

After the cool

Seafoam settles over the work already weathered.

When a firing finishes its slow descent, its record turns seafoam — cooled, logged, and quiet. The colour reassures; it never competes with the one decision still ahead.

312
firings logged
98.4%
reached peak
6
target cone

Load the kiln. Bend one cone. Cool clean.

Open the ledger