Cookware material evidence is not one generic list — it changes with the product. A frypan’s key question is the coating and the aluminium or steel base; a stainless pot’s key question is the steel grade and the bonded base; bakeware turns on the steel thickness and the surface treatment. If your RFQ asks for the same documents for every product, you will either ask for too little on the risky parts or too much on the simple ones. Match the evidence request to the product type.
Start by putting the evidence requirement into the RFQ itself: name the documents you expect with the quotation, not after you have chosen the supplier. A supplier who cannot describe what they can provide at RFQ stage is unlikely to produce better documents later.
Evidence for frypans and non-stick pans
The material story of a non-stick frypan has three layers: the base metal, the coating, and the handle. For the base, ask what metal and thickness are used — aluminium gauge matters for heat distribution, and a stainless or anodized exterior changes durability. For the coating, ask the coating brand or system, the number of layers, and what statements or test documents the supplier can provide for restricted substances. For the handle, confirm the material and how it is attached, since riveted and welded handles behave differently in use and in the dishwasher.
- Base metal type and thickness.
- Coating system and any restricted-substance statements or test reports.
- Handle material, attachment method and oven rating where claimed.
- Sample pieces for coating adhesion and heat tests before bulk.
Evidence for stainless steel pots and stockpots
Stainless pots are usually sold on grade claims such as “304” or “18/10”. A supplier statement is a starting point, but the grade claim should be traceable: ask whether the factory has material certificates from the steel mill for the batch, and whether the finished pot’s lid, handles and rivets are the same grade. An encapsulated base (aluminium or copper disc between steel layers) is a separate claim — ask for the base construction details and how the disc is sealed so it does not separate or rust at the edge.
For induction compatibility claims, confirm the base construction makes the pan induction-ready — not every stainless pot works on induction.
Evidence for bakeware and sheet pans
Bakeware is often carbon steel, aluminized steel or stainless. The key evidence is the steel type and thickness, because thin bakeware warps in ovens and corrodes in commercial washing. For coated bakeware, the coating and its temperature rating matter; for uncoated carbon steel, the seasoning or anti-rust treatment matters. Ask what the product is made of, how thick, and what surface treatment protects it in shipping and storage.
| Product type | Priority evidence |
|---|---|
| Frypan / non-stick | Base metal and gauge, coating system, restricted-substance statements |
| Stainless pot | Steel grade traceability, base construction, lid and handle grade |
| Bakeware | Steel type and thickness, coating or treatment, temperature rating |
| Knife and tools | Blade steel, hardness claim scope, handle material |
How to ask so you get usable answers
Phrase the RFQ as a request for evidence, not a request for promises. Instead of “is your pan food safe?”, ask “which material statements or test reports can you provide for the coating and the base metal?” Instead of “is it induction compatible?”, ask “what is the base construction and does it work on induction cooktops?” Suppliers answer specific questions with specific documents; they answer vague questions with reassurance.
Ask the supplier to attach documents to the quotation rather than describe them in the email. A quotation with the material certificate attached is worth more than a message saying “certificates available”.
What to do with the documents when they arrive
Check that the document names the product you are buying — a material certificate for a different model or a different coating batch is not evidence for your order. Confirm the document date and the issuing party, and keep the file linked to the PO number. When the bulk order is produced, the sample and the batch documents should match what the RFQ stage promised.
How Kitchenware Sourcing structures material evidence requests
Kitchenware Sourcing includes product-specific evidence requests in the RFQs it coordinates: material grade and construction details, coating and treatment statements, and the test documents that apply to the destination market are requested in writing before supplier selection. The team checks that the documents actually name the quoted product. Exact document needs depend on the product type and market, so confirm the evidence list with the Kitchenware Sourcing team for your order.
See Kitchenware Sourcing’s OEM process or send your product list through the contact page.
Frequently Asked Questions
What does 18/10 stainless steel mean?
18/10 refers to approximately 18% chromium and 10% nickel in the steel alloy, which is a common grade for cookware. The label should be traceable to the material batch if the claim matters for your order.
Do I need a separate certificate for the coating?
For coated cookware, ask what statements or test reports the supplier can provide for the coating system and any restricted substances. The coating brand and layers are part of the specification, not a footnote.
Can one material certificate cover all my products?
Only if the products use the same material batch and construction. A certificate for a frypan base does not prove the grade of your stockpot steel — match each document to the product it covers.
Should material documents arrive with the RFQ or after the order?
Request the evidence list in the RFQ and the documents with the quotation or sample stage. Waiting until production means you accept whatever the supplier can produce at the end.
Ask Kitchenware Sourcing which evidence list fits your products — the team will match the document requests to each product type in your RFQ.