Quick Pottery Checklist

Why Most Potters Skip the Checklist (And Why They Shouldn't)

I ran a small studio for a while, and the biggest single cause of wasted material wasn't bad clay or a faulty kiln. It was forgetting a step in the middle of a sequence. Glaze a piece before it was bone dry enough. Fire bisque at the wrong rate because you skipped a pre-heat hold. These aren't subtle errors. They are immediately obvious when the kiln cools and a batch comes out dunted, crazed, or simply never fired at all. A Quick Pottery Checklist exists to eliminate those moments. It is a structured sequence that forces you to verify state before moving forward. The method originated from production potters who needed to batch-fire consistently without relying on memory. It works because pottery has hard physical gates — moisture content, temperature thresholds, chemical cure points — and missing one gate guarantees failure downstream.

Quick Pottery Checklist

Below is the actual checklist structure I use and have shared with students. It covers the full arc from raw clay to finished kiln unload. Verify plasticity by wedging a test coil. If the coil cracks at less than 3mm radius, the clay is too dry and needs re-wetting. Document water added in milliliters per kilogram. This number matters later when you calculate drying time estimates. Label every piece with date, clay body code, and forming method before you start throwing, hand-building, or casting. I lost an entire wheel-throwing session once because I could not tell which pieces had been centered at 18% moisture versus 22%, and both groups dried at different rates in the same cabinet. The 22% batch cracked because I assumed uniform behavior. Since then I label at the moment of formation, not after.

Use a moisture meter if you have one. Bisque-ready target is typically between 3% and 5% residual water. If you do not have a meter, weigh each piece on the same day after forming and track daily mass loss. A consistent drop of 2-3% per day in normal humidity indicates stable drying. A sudden stop in weight loss means the surface has sealed and interior moisture is trapped — this is where blisters and explosions in the bisque fire come from. Set the pyrometer calibration check before loading. Kilns drift. A 50-degree offset at cone 04 means some pieces underfire and others overfire depending on position. Hold at 212°F for a minimum of two hours to drive off residual chemically combined water. Then ramp slowly through the quartz inversion at 1063°F. A 50°F per hour rate through that range prevents thermal shock cracking that looks fine until glaze firing. Weigh your glaze slurry before and after application. A standard dip should increase piece weight by 15-25 grams for a 500-gram bisque piece. That is roughly a 0.5mm dry glaze layer. Anything thinner will be transparent and weak. Anything thicker will crawl or pool. Record batch number, water ratio, and specific gravity for every glaze used. I keep a notebook column for specific gravity readings because a glaze at 1.45 sg behaves completely differently than the same recipe at 1.55 sg, and the difference shows up as dripping, crawling, or surface texture variation.

Confirm kiln vent is on before closing the lid. A closed vent during vitrification releases CO2 and sulfur compounds from the clay body that deposit directly onto your ware as smoke staining. This happens on every firing if the vent is off, and it is not visible until the kiln cools and you pull the shelf. I found this out the hard way on a rack of ten plates that all came out with a faint gray haze on the underside. Took me three firings to connect the dots. Check every piece for pinholing, crawling, shivering, and glaze banding. Run a fingernail test along the glaze-to-closed surface edge. If the nail catches, you have shivering, which means the glaze contraction is too high for the clay body. Shivering pieces are a safety hazard. Discard them immediately rather than selling or gifting them. Log every firing with kiln position map, temperature curve snapshot, glaze batch numbers, and any defects observed. This log is what lets you trace a problem back to its source months later. Without it you are guessing.

The checklist above is what I consider the minimum viable system. Some potters expand it into separate sheets per project type — wheel-thrown versus slip-cast versus slab-built each has different critical control points. But the core logic does not change: verify state, document decision, move forward.

Where This Method Breaks Down

It is not universal. Quick Pottery Checklist assumes you are working with stoneware or porcelain in standard atmospheric kilns. It does not translate well to wood-firing, salt-soda firing, or raku, where the process is deliberately variable and the concept of a fixed checkpoint sequence conflicts with the nature of those methods. In those cases, a loose decision tree works better than a rigid checklist. You still need documentation, but the verification points shift entirely. The other limitation is time. A full eight-phase checklist on every single piece adds roughly 20 to 40 minutes of administrative work per batch. For a hobbyist making two mugs a week, that overhead may not feel justified. For anyone producing more than a dozen pieces per firing, the time pays for itself by reducing repeat failures.

How to Start Using It Today

Print the eight-phase structure above on a single sheet of paper and tape it to your workspace wall. Do not try to implement all phases perfectly from day one. Start with Phase Three and Phase Six — drying verification and kiln vent confirmation — because those two steps alone prevent the majority of catastrophic firing failures. Once those become automatic, add Phase Two labeling and Phase Five glaze weight recording. Build the system gradually rather than attempting a full rollout on your next firing. A downloadable version of this checklist formatted for both tablet and print use is available through the Sapiens AI resource library. The file includes editable fields for moisture readings, specific gravity logs, and kiln position maps so you can track trends across multiple firings. The real value of a Quick Pottery Checklist is not the paperwork. It is the forced pause before each critical transition. That pause is what catches the mistake before it becomes a ruined kiln load.