Empty cans

Buyers must distinguish between Aluminum (3000 or 5000 series) for beverages and Tinplate (ETP) or Tin-Free Steel (TFS) for food. For aluminum cans, ensure the internal coating (BPA-NI or Epoxy) is compatible with the liquid's acidity (pH level) to prevent corrosion. For food cans, verify the temper grade and coating weight (e.g., 2.8/2.8 g/m²) to ensure structural integrity during the sterilization/retort process.

Products must adhere to FDA (US) or EC 1935/2004 (EU) regulations for food contact materials. Ensure the supplier provides a Declaration of Compliance (DoC) and SGS/Intertek lab reports confirming that migration levels of heavy metals and chemicals are within legal limits. For pressurized beverage cans, compliance with DOT-2P/2Q or EN 13027 standards is essential for safety.

It is critical to match the can neck diameter (e.g., 202, 206, 211) with the corresponding Easy Open End (EOE) or Stay-On Tab (SOT). Request the supplier to provide a Seam Specification Chart, which includes parameters like overlap, seam thickness, and countersink depth. If you are using your own seaming machine, ask for test samples to calibrate your equipment before placing a bulk order.

High-volume orders typically use Dry Offset Printing (up to 8 colors), which offers high speed and low unit cost. For smaller batches or premium products, consider Shrink Sleeves or Digital Printing, though the latter is less common for mass-produced metal. Always request a color proof (metal deco) to ensure brand colors remain accurate after the high-temperature curing process.

Empty cans are 'hollow' and highly susceptible to pressure damage. Insist on palletized packaging with top boards and plastic strapping, wrapped in heavy-duty shrink film. For sea freight, ensure the container is inspected for moisture levels to prevent 'white rust' or oxidation. Using Made-in-China.com's Secured Trading Service can help ensure that the goods meet quality inspections before final payment is released.

Focus on the LME (London Metal Exchange) aluminum or steel price index; professional buyers often negotiate a 'conversion cost' plus the current raw material market rate. To lower costs, aim for Full Container Load (FCL) shipments, as shipping 'air' in Less than Container Load (LCL) is economically unfeasible. Ask for a 5-10% discount on orders exceeding 500,000 units, which is a standard tier for high-speed production lines.

Verify if the manufacturer uses Automatic Vision Inspection Systems on the production line to detect pinholes, dents, or coating defects in real-time. Request a Leakage Test Report (High-pressure air test) and a Coating Continuity Test (Enamel Rater). Prioritize suppliers on Made-in-China.com who hold ISO 9001 and FSSC 22000 certifications to ensure food safety management systems are in place.

Check the HS Code (typically 7310 for steel or 7612 for aluminum) against your country's tariff schedule. Be aware of Anti-Dumping Duties (ADD) that some regions (like the EU or US) may impose on specific metal products from overseas. Ensure all Commercial Invoices and Packing Lists clearly state the material type and intended use to avoid delays during customs clearance.