20 micron aluminium foil

Selecting the correct foil requires a focus on alloy composition and temper. For food packaging, ensure the foil is made from 8011 or 3003 alloys, which provide excellent tensile strength and elongation. The 'O' (soft) temper is ideal for wrapping and laminating, while H18 (hard) temper is better suited for rigid containers. Always verify that the thickness is consistently 20 microns with a tolerance of ±5% to ensure barrier integrity against moisture, light, and oxygen.

Compliance is non-negotiable for cross-border trade. Buyers must ensure the product meets FDA (U.S. Food and Drug Administration) or EU 10/2011 regulations for food contact materials. Look for certifications such as ISO 9001 for quality management and SGS or TUV lab reports confirming the absence of heavy metals like lead or cadmium. For pharmaceutical packaging, compliance with GMP (Good Manufacturing Practice) standards is essential.

High-quality 20-micron foil should have a clean, smooth surface free of pinholes, oil spots, or wrinkles. Pinholes are critical; for 20-micron foil, the pinhole count should be near zero to maintain a total barrier. Request a wetting tension test (Dyne test) result to ensure the surface is suitable for printing or lamination. Additionally, check the bursting strength to ensure it can withstand the mechanical stress of automated packaging lines.

Pricing is heavily influenced by the LME (London Metal Exchange) aluminium ingot price plus a fabrication fee. To optimize costs, consider ordering in full container loads (FCL) to reduce shipping costs per ton. Negotiate based on net weight versus gross weight to ensure you aren't paying for heavy steel cores. On Made-in-China.com, you can find suppliers offering tiered pricing, where increasing the volume from 5 tons to 20 tons can reduce the fabrication premium by 10-15%.

The biggest risks are oxidation due to moisture during sea transit and anti-dumping duties. To mitigate oxidation, insist on seaworthy packaging involving plastic film, desiccant, and strong wooden cases (Fumigated). To avoid unexpected costs, check your country's Trade Remedy records for anti-dumping duties on Chinese aluminium foil; some specific gauges or alloys may be exempt or have lower rates.

For new suppliers found on Made-in-China.com, utilize Secured Trading services to protect your funds. A standard payment term is 30% T/T deposit and 70% against the Bill of Lading (B/L). For large-scale enterprise orders, an Irrevocable Letter of Credit (L/C) at sight is recommended to ensure the supplier meets all documentation and quality requirements before payment is released.

Aluminium foil is high-density cargo. Use 20ft containers rather than 40ft, as weight limits are reached long before volume limits. Ensure the supplier uses 'Eye to Sky' or 'Eye to Wall' palletizing based on your warehouse unloading equipment. Always include Marine Insurance (All Risks) to cover potential physical damage or water ingress during the long-haul voyage.