Zinc alloy medal

Zinc alloy is the preferred material for medals due to its excellent fluidity and high precision in die-casting. When selecting, prioritize 3D die-casting for intricate, multi-layered designs or high-relief textures. For flat designs, 2D die-casting is more cost-effective. Ensure the supplier uses high-purity zinc alloy (Zamak 3 or Zamak 5) to prevent oxidation and ensure a premium weight feel.

The plating quality determines the medal's longevity. Demand electroplating rather than simple spray painting. Common finishes include antique gold/silver/copper for a prestigious look or shiny polished finishes for sports events. Verify that the supplier applies a clear lacquer coating (electrophoretic coating) to prevent tarnishing and skin irritation. For color filling, soft enamel is standard, while hard enamel (cloisonné) offers a flat, durable, and premium jewelry-like finish.

Since medals are often handled by children or athletes, they must meet strict chemical safety standards. Ensure products are Lead-Free and Nickel-Free. Request test reports for RoHS and REACH compliance for the European market, and CPSIA (Consumer Product Safety Improvement Act) for the U.S. market. Additionally, check that the ribbon material (polyester or nylon) meets OEKO-TEX Standard 100 for textile safety.

Focus on the attachment point (the loop or jump ring); it should be cast as part of the medal or securely soldered to prevent breaking. The ribbon should have a minimum thickness of 0.6mm and use sublimation or heat-transfer printing for vibrant, fade-resistant logos. Request a salt spray test report (typically 24-48 hours) to ensure the plating won't corrode during sea freight or in humid environments.

The primary risk is mold inconsistency; always request a pre-production sample (PPS) to verify the 3D depth and logo accuracy before mass production. Another risk is weight cheating, where suppliers might use lighter alloys or hollow out the back without notice. Specify the exact thickness (e.g., 3mm or 5mm) and net weight per unit in the contract.

Negotiate based on mold fee amortization. For orders exceeding 5,000 units, many professional suppliers on Made-in-China.com will waive the mold fee. Additionally, ask for tiered pricing based on volume, as the unit cost of zinc alloy drops significantly when the die-casting machine runs continuously for larger batches.

Zinc alloy is heavy, making sea freight or rail freight the most economical for bulk orders. To prevent scratching during transit, insist on individual polybag packaging or bubble wrap layers. For high-end awards, consider custom velvet boxes, but ensure they are packed in double-walled corrugated export cartons (K=K) with moisture-absorbent silica gel packets.

Utilize the Secured Trading Service on Made-in-China.com to protect your payment until the goods are shipped. Conduct a factory audit or request a video inspection to confirm the supplier has in-house die-casting machines and polishing lines, which ensures better quality control than trading companies that outsource production.