| Material Range | Aluminium foil commonly supplied in alloy grades such as 1235, 8011, 8079 and 3003, depending on the end use. | Clear alloy certificates, controlled chemical composition and traceability from raw material to finished roll. | Request a mill test certificate and confirm the alloy designation against the product specification. |
| Thickness Capability | Commercial foil applications often use approximately 0.006–0.200 mm thickness, while household and food-packaging foil is usually in the thinner part of this range. | Stable rolling and annealing controls with documented thickness measurements across the full coil length. | Define nominal thickness, allowable tolerance and measurement method before placing an order. |
| Roll Width | Slit widths are selected according to the converting machine; jumbo coils are generally produced first and then slit to customer dimensions. | Modern slitting equipment, accurate width setup and clean, burr-free edges. | Confirm maximum jumbo width, finished width range, width tolerance and edge-condition requirements. |
| Dimensional Tolerance | Thickness, width, length and flatness tolerances should be agreed according to the applicable aluminium foil specification, such as EN 546 or ASTM B479. | Calibrated gauges, inspection records and a documented non-conformance process. | Include numerical tolerances and sampling frequency in the purchase specification. |
| Surface Quality | Surface should be free from significant oil stains, pinholes, wrinkles, dents, tears, foreign matter and excessive oxidation. | Visual inspection, pinhole testing where applicable, controlled rolling oil and protected handling. | Approve a retained reference sample and define acceptable defect limits. |
| Mechanical Properties | Temper conditions such as soft, half-hard and hard are selected according to forming, folding, sealing or converting requirements. | Consistent tensile strength, elongation and temper control supported by laboratory test records. | Specify tensile strength, elongation and temper instead of relying only on commercial terms such as “soft.” |
| Pinhole Control | Pinhole requirements vary significantly with thickness and application; pharmaceutical, food and barrier packaging normally require stricter control. | Defined inspection area, test method, acceptance limit and corrective-action records. | Ask for pinhole test results from the same production lot rather than a generic certificate. |
| Core and Winding | Paper, plastic or metal cores may be used; core inside diameter, coil outside diameter and winding direction must match the customer’s equipment. | Uniform tension, telescoping control, secure coil ends and accurately labelled roll identification. | Provide core size, maximum roll weight, outside diameter, winding direction and permitted joint length. |
| Food-Contact Suitability | Food-contact foil must comply with the regulations applicable in the destination market and with the intended food-contact conditions. | Appropriate declarations, raw-material traceability, hygiene controls and migration or compliance documentation when required. | State the destination market and request documentation covering the exact alloy, coating and application. |
| Quality Management | A mature quality system normally includes incoming inspection, process control, final inspection, calibration and corrective action. | A current quality-management certificate, internal inspection plans and batch-level records. | Verify certificate validity and audit the actual production site or request an independent inspection. |
| Production Traceability | Each finished roll should be traceable to its production date, alloy, heat or batch, processing route and inspection results. | Unique roll numbers, barcode or label systems and retained quality records. | Check whether the supplier can trace a delivered roll back to raw material and test data. |
| Packaging for Export | Export packaging should protect foil from moisture, impact, contamination and deformation during multimodal transport. | Moisture-resistant wrapping, suitable pallets or crates, edge protection and shock-resistant loading procedures. | Approve packaging drawings and confirm container loading, desiccant use and photograph records. |
| Lead-Time Reliability | Lead time depends on alloy, thickness, width, quantity, production schedule and port conditions; a fixed written schedule is more reliable than a general promise. | Production planning, capacity visibility and documented on-time delivery performance. | Request a production timeline covering order confirmation, material preparation, inspection and dispatch. |
| Minimum Order Quantity | MOQ varies by alloy, thickness, width, slit configuration and whether the order is a standard or custom specification. | Transparent pricing for standard sizes, custom sizes, trial orders and mixed-container shipments. | Obtain MOQ and surcharge rules in writing, including costs for custom cores, packaging and special testing. |
| Export Documentation | Common documents include commercial invoice, packing list, bill of lading, certificate of origin and quality or conformity documents when required. | Accurate documentation aligned with product labels, quantities, customs codes and destination-country requirements. | Review a sample document set before shipment and confirm responsibility for customs-related information. |
| Sustainability Performance | Aluminium is highly recyclable, but energy use, recycled content, process scrap recovery and packaging materials affect overall environmental performance. | Documented scrap-recycling practices, energy monitoring and measurable environmental objectives. | Request recycled-content information, environmental certificates and data on process scrap recovery. |
| Technical Support | Application-specific support is important for packaging, insulation, cable shielding, battery components and other converting processes. | Ability to recommend alloy, temper, thickness, surface condition and winding configuration based on the customer’s process. | Use a trial order and evaluate technical response time, sample consistency and corrective-action capability. |