How to Read a Ceramic Knife Test Report

A test report is only useful if you can tell what it actually covers. Most buyers receive a PDF with a logo and a pass stamp, file it, and discover the gap when a retailer asks a question the report cannot answer.

This is how to read one properly.

What a real report contains

• Laboratory name and accreditation number (ISO/IEC 17025, CNAS, CMA or equivalent).
• Report number and issue date.
• Applicant and manufacturer — they are not always the same.
• Sample description: model, material, colour, and often a photo.
• Test method and standard referenced.
• Test conditions: simulant, temperature, duration, number of cycles.
• Results against limits, with the limit values stated.
• Conclusion per parameter, not just one word at the end.

If any of these is missing, the document is a certificate, not a test report.

The six questions to ask it

1. Does the scope match your product?

Same factory is not the same article. A report for a white-bladed 5-inch santoku does not automatically cover a black 6-inch chef knife, and a report for a PP handle does not cover ABS.

2. Does it cover every food-contact surface?

The blade and the handle are both in contact with food. Reports frequently cover the blade only.

3. Which colour was tested?

Pigments can introduce metals. Black and coloured handles or blades need their own coverage; “the material is the same” is not a compliance argument.

4. What were the conditions?

For ceramics, lead and cadmium release is typically tested with 4% acetic acid at 70 °C for 2 hours, often repeated for three cycles. A report that used water at room temperature is not equivalent.

5. Are the limits the ones for my market?

EU, US and California limits differ. A report evaluated against Chinese limits does not answer an EU retailer’s question.

6. How old is it?

Reports age. Many retail compliance teams want something within 12–24 months, and some want the report to cover the production batch.

Red flags

• The word “certificate” and no test data.
• No laboratory name, or a lab you cannot find online.
• No sample photo and no model number.
• Results stated as “pass” with no measured values.
• The report covers a completely different product category.
• Someone offers to “make one” for your order.

Verifying it in ten minutes

1. Search the report number on the laboratory’s website — most have a verification portal.
2. Check the accreditation number against the national accreditation body.
3. Compare the sample photo and model with your PO.
4. Ask the supplier to confirm in writing that the report covers the exact model and colour you are buying.

When there is no report

Two options: test a sample yourself, or do not buy. Commissioning a test on a production sample is inexpensive relative to the cost of a recall or a delisted SKU. If the supplier cannot provide a sample for testing, that is the answer.

What to keep

For each SKU and market: the report, the declaration of compliance, the material declaration, and a note of which colour and model it covers. Keep them in one folder — when a marketplace asks, you want to send one link, not search three suppliers.

Related reading: the compliance documents to ask for · the 9-point sourcing checklist.