Three Steps from Scraps to Usable Clay

Reclaiming clay is simple but requires patience. The full process (from dry scraps to wedged, plastic clay) typically takes 2-4 days depending on conditions.

Step 1: Slake

Place dry or leather-hard scraps into a large bucket. Add water until the scraps are fully submerged. Let them sit for at least 24-48 hours. The clay will absorb water and collapse into a thick, muddy slurry.

• Do not stir during slaking: let the clay absorb at its own pace.
• Break up any large leather-hard pieces before adding them to the bucket to speed up the process.

Step 2: Dry to a Workable Consistency

Once the clay is fully slaked into a slurry, you need to remove excess water. There are two main methods:

• Plaster bat: Pour the slurry onto a large plaster bat or into a plaster mold. Plaster absorbs water rapidly and the clay stiffens within hours.
• Drying on canvas or cloth: Spread the slurry onto absorbent canvas and allow it to dry in a warm space, turning it occasionally. Takes longer but works without plaster equipment.

Allow the clay to reach a stiff, plastic consistency: it should hold its shape when squeezed but not crack.

Step 3: Wedge

Reclaimed clay must be thoroughly wedged before use. Slaked clay tends to be uneven in consistency: some parts softer, some firmer. Wedging homogenises the moisture throughout the batch.

Use spiral or ram's head wedging until the clay is smooth, consistent, and free of air pockets. Reclaimed clay is then ready to use exactly like fresh clay.

Keep Exploring

The reclaim process is a cornerstone of sustainable studio pottery practice, reducing both cost and waste. The plaster bat method works because plaster absorbs water from the clay slurry, a property that also makes plaster dangerous if fragments contaminate the clay: the same absorption that makes it useful for drying also causes explosive expansion inside a kiln during vitrification.

Timing and Quality Checks

Before wedging, test moisture by slicing the mass:

• If the center is wetter than the edges, wait and turn the mass again.
• If edges crack when bent, it is over-dry and needs light rehydration.
• If the cut face looks uniform and satin, it is ready for wedging.

Pro Tip

Batch reclaim on a weekly schedule. Predictable reclaim cycles reduce studio mess and ensure you always have clay ready to throw.