Quality control guide
Stainless Steel Kitchenware Quality Control Checklist
Use this checklist to build your inspection plan for stainless steel houseware and cutlery. It follows the order a production order moves through: material, forming, finishing, function, marking and packing.
1. Before production: material and golden sample
Confirm the mill certificate for the steel lot and match it to the grade in the purchase order. Record thickness, weight, dimensions and finish on a sealed golden sample signed by buyer and factory. Every later check is measured against this sample.
2. During production: forming and welding
Check thickness with a micrometer and weight per piece on a scale. Look for cracks or thinning at drawn corners, and check rims are rolled evenly. Welds should be smooth, continuous and passivated, with no heat tint left on food-contact surfaces.
3. Finishing
Inspect polish under consistent light for scratches, pits, orange peel, waves and polishing compound in corners. For PVD, compare colour with the golden sample and check coating adhesion. For cutlery, run a finger along edges and tines to find burrs.
4. Function tests
Lid fit and leak tests on sealed containers and lunch boxes. Induction tests on cookware bases. Retention tests on insulated drinkware where a claim is made. Load tests on handles of colanders, ladles and pans. Knife sharpness and serration checks.
5. Marking, labels and packing
Check country-of-origin marking (permanent marking on knives, forks and vacuum flasks for the US), grade marking where claimed, barcodes, care text and importer details. Check protective film, inner packs, set completeness, carton marks and drop tests for e-commerce packs.
6. Defect classification and sampling
Classify defects before inspection. Critical: a safety or legal issue, such as sharp burrs, wrong grade or missing mandatory marking. Major: a functional or saleability issue, such as a leaking lid, deep scratches or a wrong finish. Minor: a cosmetic issue within an agreed limit.
Sample under ANSI/ASQ Z1.4 or ISO 2859-1 with agreed AQLs (often 0 for critical, 2.5 for major and 4.0 for minor). Agree the AQL levels in the purchase order. Nothing should ship on a failed inspection without the buyer's written decision.
Frequently asked questions
What AQL should I use for kitchenware?
Many buyers use 0 for critical, 2.5 for major and 4.0 for minor defects. Agree the levels in the purchase order before production.
When should the final inspection happen?
When production is complete and at least 80% is packed, before the balance payment and container loading.
How do I check the steel grade during inspection?
Compare the mill certificate with the order and take an XRF analyser reading or lab test on pieces drawn at random from production.
Official sources
Related
Let's find the right source for your next product.
Tell us what you are looking for. We will identify the relevant Indian manufacturing ecosystem and the next steps.