How to Throw a Wide Rimmed Platter Without Warping
A broad platter looks simple, but its large surface area makes it one of the more demanding forms to throw. The centre can slump, the rim may lift or ripple, and uneven drying can turn a clean circle into a subtle oval. The key is to control the clay at every stage rather than trying to correct the shape once it has become unstable.
For Australian potters, local conditions add another variable. A dry Adelaide studio, a humid Brisbane afternoon and a cold Melbourne winter will each change how quickly moisture leaves the clay. A reliable process therefore combines suitable clay, firm compression, measured throwing and slow, even drying.
Choose Clay and Prepare The Bat
Begin with a clay body that can support a wide, shallow form. A stoneware body with fine grog or paper-thin texture is often more forgiving than a very smooth porcelain, especially for a large serving piece. Fine grog helps reduce shrinkage and gives the platter more structure, while coarse particles can mark the surface or catch under a metal rib.
For a finished platter around 30 to 36 centimetres wide, prepare at least 1.5 to 2 kilograms of clay. Wedge thoroughly to remove air pockets and distribute moisture evenly. Centre the clay on a sturdy bat rather than throwing directly on a soft, removable surface. A plaster or timber bat can make later handling easier, although timber should be sealed and kept clean.
Amelia Johannsen’s Barcelona studio photo essay offers a useful reminder that the studio environment is part of the making process. Keep your water, ribs, sponge, calipers and a steady work board within reach so you can shape the platter without repeatedly stopping or leaning across the wheel.
Establish A Strong, Low Centre
After centring, open the clay gradually and leave a generous floor thickness. For a broad serving platter, the centre may begin at 8 to 10 millimetres thick, depending on the clay body and final size. Compress the base firmly with a wooden rib or soft metal rib, moving from the centre towards the wall. This removes throwing lines and aligns the clay particles, helping the floor resist cracking and warping.
Pull the wall in stages rather than attempting one dramatic lift. Keep your outside hand steady and support it with your inside fingers. The form should remain low and gently curved, with the wall becoming thinner as it approaches the rim. Avoid creating a sharp angle between the floor and the side; that transition is a common place for stress to gather.
A wide rimmed platter needs a rim that is broad enough to read as intentional but not so heavy that it pulls the wall outward. Leave the rim slightly thicker than the middle section, then compress its top and underside carefully. A slow wheel speed gives you more control when widening the edge and reduces the chance of stretching one section more than another.
Shape And Compress The Rim
Once the main profile is established, use a throwing rib to refine the curve. Work in small sections and rotate the wheel slowly. A metal rib can create a crisp, contemporary surface, while a wooden rib tends to preserve a softer, more tactile finish. For a natural, coastal style, a subtle undulation can be attractive, but it should be deliberate rather than caused by inconsistent pressure.
Do not keep adding water to make the rim easier to move. Excess water weakens the outer wall and encourages the platter to slump after it leaves the wheel. Instead, use a damp sponge sparingly and wipe away standing water from the base. If the clay begins to feel soft, pause and let it firm up before making another pass.
The rim can also be shaped with a gentle inward turn, a flat gallery or a softly raised lip. Consider how the piece will be used in Australian homes and hospitality settings, from a relaxed weekend table in Sydney to a shared antipasto spread in a Melbourne studio kitchen. A stable, comfortable edge is more useful than an elaborate profile that chips easily.
Dry Slowly And Trim With Care
Leave the platter on its bat until it reaches a firm leather-hard stage. Do not lift it by the rim, even if it appears strong. Instead, slide a wire underneath only when the clay has enough stiffness to hold its shape, then transfer it to a dry, flat board. Check the silhouette from above and rotate the piece to spot any early distortion.
Cover the platter loosely with plastic, leaving a small opening for air exchange. After several hours, turn it upside down onto soft supports so moisture can escape from both sides. In a dry climate such as inland South Australia, keep the cover more complete; in humid coastal Queensland, allow slightly more ventilation. The goal is slow, even drying rather than a fast surface cure.
Trim the foot when the underside is leather-hard but still workable. A low foot ring gives the platter a visual lift and reduces the amount of clay in contact with the table. Keep the foot centred and avoid making it too narrow, as a tiny support can exaggerate any unevenness in the broad floor. After trimming, compress the underside once more and smooth the transition into the foot.
If a platter cracks or breaks at the bisque stage, avoid treating it as wasted clay. Amelia’s guide to recycling broken bisque ware explores ways to turn fragments into new ceramic work, such as mosaic surfaces, textured slabs or sculptural additions.
Fire With Consistency And Review Each Batch
Before glazing, inspect the platter on a flat surface. A slight rocking motion may become more noticeable after firing, so correct minor irregularities while the bisque piece is still workable only through sanding or careful foot adjustment. Use a food-safe glaze if the platter will hold meals, and keep glaze off the foot and kiln shelf.
Load the kiln with enough space around the piece for even heat circulation. Follow the firing schedule recommended for the clay body, especially during the early stages when remaining moisture must escape. Large flat forms benefit from consistent kiln conditions; placing a platter close to a heating element or stacking weight above it can increase distortion.
Keep notes on clay batch, diameter, thickness, drying time, glaze and kiln position. This is particularly helpful when selling through Australian makers’ markets or supplying cafés and small retailers, where repeatable sizes matter. Record whether a platter was made for decorative display or food service, since that affects glaze choice and testing.
Practical Checks For Better Platters
- Measure the floor and rim thickness with callipers before the clay becomes leather-hard.
- Compress the centre and rim after every major throwing pass.
- Dry on a flat support under loose plastic, turning the piece gradually.
- Use a broad, stable foot rather than an overly delicate ring.
- Test glazes on small tiles before applying them to a large serving surface.
A calm, repeatable routine will produce better results than forcing the clay into a perfect outline. Once the form is reliable, experiment with layered slips, sea-worn textures and abstract marks inspired by the Pacific Northwest or Mediterranean coastline. For further visual references in functional and sculptural design, explore the tactile approach shown through Sakao Lifeworks.
Take your next platter slowly, photograph it at each stage and compare the finished profile with your notes. Share the process through your studio portfolio or mailing list, and invite local collectors, cooks and workshop guests to see how careful clay preparation becomes a durable piece for everyday Australian tables.