Material safety is a key consideration in jewelry manufacturing. Choosing the right metal material ensures product reliability and compliance with safety requirements.
To verify the safety of our 11mm environmentally friendly copper rod material, we conducted a heavy metal test through Guangdong Consumer Testing Technology Co., Ltd. (CTT). According to the Heavy Metal Test Report (Report No.: CTT2601011183EN), the material passed the testing requirements for Cadmium (Cd), Lead (Pb), and Nickel (Ni).
Key Test Report Information
- Report Certificate No.: CTT2601011183EN
- Report Issue Date: Jan 07, 2026
- Testing Laboratory: Guangdong Consumer Testing Technology Co., Ltd. (CTT)
- Sample Description: 11MM environmentally friendly copper rod material
- Sample Color: Brass
- Sample Quantity: Three pcs
- Test Requested: Total heavy metal elements – Client’s requirements
- Test Method: CPSC-CH-E1001-08.3
- Reporting Limit / LOQ(Limit of Quantitation):
- Cadmium(Cd): 2 mg/kg
- Lead(Pb): 10mg/kg
- Nickel(Ni): 10mg/kg
Heavy Metal Test Results(Fully Compliant)
| Tested Items | Limits | Results |
|---|---|---|
Cadmium (Cd) |
90 mg/kg |
ND |
Lead(Pb) |
90 mg/kg |
34 mg/kg |
Nickel(Ni) |
Not specified |
62 mg/kg |
N.D. means Not Detected (below the laboratory’s detection limit).
According to the laboratory report, the tested 11mm environmentally friendly copper rod material passed the heavy metal element testing requirements.
Important: The nickel value shown in this report is a total material-content measurement. The report does not specify a regulatory limit for nickel and is not a nickel-release test. For an example of finished-product copper jewelry testing, see our eco-friendly copper bracelet SGS test report.
Why Test Copper and Brass Raw Materials Before Jewelry Production?
Raw-material testing is an important part of jewelry product development because compliance problems are much more difficult to correct after a product has already been manufactured. By checking materials before production, jewelry buyers can obtain better visibility into the materials entering their products.
For custom jewelry projects, this can help with:
- Raw Material Verification: Confirming that selected copper or brass materials have undergone third-party laboratory testing.
- Supplier Documentation: Providing supporting material reports when buyers request documentation during sourcing or product development.
- Early Risk Control: Identifying potential material issues before cutting, machining, stamping, casting, plating, assembly, and final production.
- Batch Traceability: Connecting raw-material documentation with the materials used during manufacturing.
- Customized Testing Requirements: Allowing additional testing to be arranged when a customer’s target market or product specification requires it.
Looking for Reliable Copper Jewelry Manufacturing Support?
Whether you are developing:
- Custom copper jewelry
- Brass jewelry components
- Mixed-material accessories
- OEM/ODM jewelry collections
our team can support material selection, product development, and manufacturing solutions.
Discuss Your Jewelry ProjectFAQs
Q1. What products can be made with 11mm copper rod material?
The 11mm copper rod material can be processed into various jewelry components, including pendants, connectors, decorative elements, and other metal parts used in custom jewelry production.
Q2. Why is copper rod material suitable for jewelry manufacturing?
Copper rod material provides good machinability and can be processed through cutting, forming, polishing, and surface finishing processes, making it suitable for creating different jewelry designs and components.
Q3. Can the copper rod material be combined with other materials?
Yes. Copper components can be combined with different materials, such as stainless steel, enamel, resin, stones, or other decorative elements, depending on the product design requirements.
Q4. Can Haosen Jewelry help with copper jewelry product development?
Yes. We support customers from material selection and design development to manufacturing and quality control, helping brands turn concepts into finished jewelry products.
Q5. What information should I provide when developing custom copper jewelry?
To evaluate a project efficiently, customers can provide product drawings, reference images, material requirements, quantity expectations, and surface finishing preferences. Our team can then recommend suitable manufacturing solutions.
