Processing of Composition Analysis and Testing Reports for Stainless Steel Lunch
Date：2026-10-08 09:53:49 Classification
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Guide to Obtaining Composition Analysis and Testing Reports for Stainless Steel Lunchboxes
Stainless steel lunchboxes are classified as metal products intended for food contact; composition analysis and testing serve not only as proof of quality but also as a crucial basis for ensuring food safety and meeting market access requirements. The following provides a systematic overview covering the purpose, standards, testing parameters, and procedures.
II. Key Standards for Testing
Different sales scenarios require compliance with different standards, as outlined below:
| Scenario | Key Standards | Notes |
| Domestic Sales / E-commerce | GB 4806.1-2016, GB 4806.9-2016 | Mandatory national food safety standards |
| Material Grade Verification | GB/T 3280, GB/T 20878 | Standards for stainless steel grades and composition |
| Export to the EU | LFGB, EU Regulation No. 1935/2004 | Regulations on food-contact materials |
| Export to the USA | FDA 21 CFR | Requirements for food-contact materials |
| Export to Japan/South Korea | Japan's Food Sanitation Act, KFDA | Local national regulations regarding materials |
Note: E-commerce platforms (such as Taobao, JD.com, Pinduoduo, and Douyin) typically require test reports bearing CMA or CNAS certification marks for food-grade stainless steel products. II. Typical Testing Items
Testing for stainless steel lunch boxes generally comprises two parts: material composition analysis and food-contact safety testing.
1. Material Composition Analysis (Qualitative and quantitative chemical analysis)
Key elements: Chromium (Cr), Nickel (Ni), Molybdenum (Mo), Manganese (Mn), Carbon (C), Silicon (Si), etc.
Grade verification: e.g., 304, 316, etc., to determine compliance with relevant national standards.
Actual weight coefficient for the stainless steel grade.
2. Food-Contact Safety Testing
Heavy metal migration: Lead (Pb), Cadmium (Cd), Arsenic (As), Nickel (Ni), Chromium (Cr), etc.
Sensory requirements: Color/appearance, odor, and characteristics of the immersion solution.
Special requirements: Additional testing items may apply for products such as those intended for children, thermal insulation products, or coated products.
3. Other Potential Testing Items
Physical properties: Sealing performance, temperature resistance, impact resistance.
Coating testing: Specific details are required if the coating comes into contact with food.
III. Application Steps (Practical Workflow)
The entire process generally consists of five steps:
1. Clarify intended use and sales channels: Domestic market or export? Online or offline sales? Intended for children or adults? 2. Select a qualified testing agency: Prioritize third-party agencies with CMA accreditation.
3. Consult and confirm the testing plan: Determine testing standards and items based on the intended use; the agency will provide a testing plan and quotation.
4. Submit samples for testing: Provide samples according to the agency's requirements (usually, a specific quantity is needed for each testing item).
5. Issue the report: A formal report is issued after successful testing; reports bearing the CMA mark carry legal validity.
IV. Timeline and Costs
| Item | Reference Range
| Testing Timeline | Standard testing: 5–7 working days; Expedited: 3–5 working days
| Costs | Single-component analysis: Approx. 500–1,500 RMB
| Sample Quantity | Usually 2–3 finished products or >50cm of material per item
Actual costs depend on the number of testing items, sample quantity, and the urgency of the request.
V. Factors for Selecting a Testing Agency
CMA Accreditation: Mandatory; a key basis for national market access
CNAS Mark: Expands the scope of testing services and enhances acceptance in export markets
Agency Reputation: e.g., Dezewei Testing (CNAS Registration No.: L8083)
Timeline and Price: Significant differences exist between agencies; comparing multiple providers is recommended
Reporting Capabilities: CMA is required for domestic sales; additional credentials like CNAS or international business capabilities are advantageous
VI. Important Notes and Common Misconceptions
Not all reports are universally applicable: A standard composition analysis report is *not* the same as a food-grade testing report; the testing items and standards differ
Avoid "one report for multiple uses": Separate testing is required for different product structures, materials, and coatings
Sample authenticity: Materials such as solid wood, raw bamboo, and stainless steel require numbered sampling
Stricter standards for children's products: Specific standards (e.g., GB 4806.7) impose additional restrictions on food-contact materials intended for infants and children
Report validity period: Long-term reports usually require recent test data to prevent prolonged, unsubstantiated claims
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