Start with the materials, not your postcode
Keep the manufacturer and product names for both your clay body and glaze. Record their stated firing ranges and any instructions supplied with them. Send those details to the firing service before booking. “White clay” or “stoneware glaze” is too vague for an operator to decide whether work belongs in a particular load.
Tell the studio whether the work is unfired, already bisque-fired or being considered for a refire. Include any previous firing information you have. If you cannot identify a material, explain that uncertainty instead of guessing. The studio may decline it or ask for further information.
Read firing labels carefully
Studios may describe services by cone, temperature or categories such as bisque and mid-fire. Ask for the operator’s actual firing programme and whether it suits your materials. Cone 06 and cone 6 are different designations; copy the complete specification rather than shortening it in an enquiry.
Write the exact requested cone or temperature into your enquiry and ask whether it can join a scheduled load. A service category alone does not tell you when a suitable load will run. If your work needs a separate programme, confirm the minimum load, charge and available date before making a larger batch.
Check physical and material acceptance
Supply the height, width and depth of your largest piece, including any projecting handles. Ask about usable shelf dimensions rather than only the kiln’s advertised size. Leave the operator to determine loading and clearances. A sculpture that fits through the door may not fit the available shelf arrangement.
Disclose unusual inclusions, experimental finishes or a glaze combination you have not tested. Ask whether the service accepts these and whether a test piece is appropriate first. Do not treat a willingness to fire a test as a guarantee of the final appearance or the suitability of a finished object for food contact.
Plan a test before a collection
For a coordinated set, try a small representative piece using the same clay, application and intended firing. Keep photographs and notes so you can discuss the result with the operator. Small differences between materials or processes can make a vague memory of a previous result unhelpful.
Once the test is acceptable, book the next stage and ask about turnaround, pickup and storage terms. If you have a market or exhibition date, include time for both bisque and glaze stages and a contingency. A directory match identifies a possible service; the operator’s acceptance confirms your particular job.
Sources & further reading
- Throw Clay Studio: firing services (opens in a new tab)
- Glaze Galleria: firing service (opens in a new tab)
Prepared 5 November 2026. General planning guidance, not a substitute for provider instructions or professional advice.