How Does AQL Inspection Work for Ceramic Tableware?
AQL inspection is how a shipping decision gets made on a sample instead of on hope: draw pieces at random from the finished lot, classify every defect found, and compare the counts against a plan agreed before production. For ceramic tableware the plan only works when it is anchored to one more thing — the sealed golden sample.
AQL inspection in four moves.
The sampling plan — lot size, sample size and acceptance numbers — is fixed in your program before the first piece is fired, so the shipment is judged by rules, not by mood on inspection day.
- Form the lot. The goods offered for inspection are grouped — by SKU, decoration and production run — so the sample represents something definable.
- Draw at random. Pieces are pulled at random across cartons, from the packed goods, not from a curated pallet at the front.
- Classify every defect. Each finding is graded critical, major or minor — against the golden sample and the written specification, not against the inspector's memory.
- Compare to the plan. Critical defects carry zero tolerance; majors and minors are judged against the acceptance numbers of the agreed plan. Pass releases the shipment; fail holds it.
What critical, major and minor mean on a dinner plate.
The binding definitions are set per program; the examples below are the working classifications ceramic quality control teams use in practice.
| Class | Definition | Typical examples on ceramic tableware |
|---|---|---|
| Critical | Unsafe or unusable; zero tolerance | Through-body cracks, chipped rims leaving a sharp edge, exposed metal or sharp points, breakage in carton |
| Major | A customer would return the piece | Glaze defect on the food-contact surface, decoration off registration, dimension off spec so lids do not fit, crazing across the glaze |
| Minor | Cosmetic; sale unaffected | Pinholes on the outer wall, slight tone movement inside the agreed variation band, faint handling marks on the foot |
Whether a given flaw is major or minor is decided by your written specification and golden sample — the table above is the common starting point, not a substitute for it.
Inline catches it while it is cheap. Pre-shipment catches what is left.
Inline inspection (DUPRO) runs while forming, firing and decoration are still in progress. Dimensions, glaze defects and decoration registration are checked against the sealed golden sample at the line — problems found here cost a correction, not a container.
Pre-shipment inspection runs after packing, on the finished, cartoned lot. Random sampling to the agreed AQL plan, packed-carton drop and marking checks, with measurements and photographs in the report. It is the last gate before the container closes — which is why it inspects the goods you are actually shipping, in the boxes you are actually shipping them in.
Both gates read from the same two documents: the golden sample and the specification with its variation bands. Remove either, and ceramic quality control becomes an argument between opinions.
AQL questions buyers ask us.
Which AQL level should I set for ceramic tableware?+
It depends on your channel and price point — gift-grade retail and hotel programs set tighter plans than clearance channels. What stays constant across programs: critical defects carry zero tolerance, and the sample size and acceptance numbers are written into the program before production, then held for every run. The plan is agreed in your program documents, not improvised per shipment.
When should pre-shipment inspection be scheduled?+
After packing is complete and at least the agreed share of the lot is finished — early enough to re-work within the shipping window, late enough that the sample represents the whole shipment. Booking it against the production calendar from the start avoids the classic failure: goods packed, inspector unavailable, vessel leaving anyway.
What happens if a shipment fails AQL inspection?+
The shipment is held. A corrective-action request goes back to the production side with the classified findings and photos; the factory sorts or re-works the affected goods, and a re-inspection is booked. Nothing loads into the container until a re-inspection passes — which is precisely the money the whole gate exists to protect.
Set the plan once. Every run answers to it.
Send your products and market — you will get a program with inspection gates, AQL plan and golden-sample discipline written in before production starts.