Duplex grey board

When evaluating Duplex Grey Board, you must prioritize Grammage (GSM), which typically ranges from 200gsm to 500gsm, and Thickness (Caliper) to ensure it meets your packaging needs. Key performance metrics include Bursting Strength, Stiffness (Taber Stiffness), and Moisture Content (ideally 6-9%). For high-quality printing, verify the Surface Smoothness and Brightness of the white coated side to ensure color fidelity.

To prevent jamming or tearing in automated lines, the board must have excellent ply bond strength to avoid delamination. Request data on Folding Endurance and Cobb Value (water absorption rate); a low Cobb value on the coated side ensures that adhesives and inks set correctly without causing the board to warp or soften during the packaging process.

Since Duplex Grey Board is often used for consumer goods, ensure the supplier complies with FSC (Forest Stewardship Council) certification for sustainable sourcing. If the board is intended for food-contact secondary packaging, it must meet FDA or EU 1935/2004 standards. Additionally, verify ISO 9001 for quality management and ISO 14001 for environmental management systems.

Request a Printing Surface Test report. The coating should be uniform without pinholes or dust, which can cause printing defects. High-quality boards use Kaolin clay or Calcium Carbonate coatings that provide a Gloss level of 40-60%, ensuring that CMYK colors appear vibrant and sharp for retail branding.

The biggest risks are moisture damage and edge crushing. Ensure the supplier uses heavy-duty plastic film wrapping and reinforced corner protectors on pallets. Specify that containers must be inspected for leaks or holes before loading, and consider using desiccants inside the container to manage humidity during long sea voyages.

Paper prices fluctuate based on pulp market indices. It is wise to negotiate a formula-based pricing model for long-term contracts. For MOQs, while standard runs are often 5-10 tons per size, you can negotiate lower MOQs by aligning your order with the supplier's existing production schedule or by sourcing from suppliers on Made-in-China.com who maintain stock of standard sizes like 700x1000mm.

Always use Secure Payment services provided by reputable platforms like Made-in-China.com to ensure funds are only released upon proof of shipment. For large orders, insist on a Third-Party Pre-shipment Inspection (PSI) to verify the GSM, weight, and quantity against the Proforma Invoice before the final balance is paid.

Check the HS Code (typically 4810.92) for your specific country to determine import duties. Be aware of anti-dumping duties that some regions (like the EU or India) may impose on specific paper grades. Ensure the supplier provides a clear Certificate of Origin to help you benefit from any applicable Free Trade Agreements (FTAs).