0.3-3mm 4MM Thickness Duplex Board Grey Back Grey Board with Grey Core

In the world of high-end packaging, the substrate is the foundation upon which prestige is built. Our 0.3mm to 4mm Thickness Duplex Board, specifically engineered as a Grey Back Grey Board with a consistent Grey Core, represents the pinnacle of structural integrity and reliability for demanding packaging applications. This board is not merely a material; it is the unseen engine of luxury, providing the robust skeleton for products that demand nothing less than perfection.

Crafted from a precisely formulated Mixed Pulp, this grey board achieves an ideal balance between performance, cost-effectiveness, and machinability. The defining characteristic of this product is its c, which extends through its entire cross-section. This uniformity is critical, as it eliminates the risk of unsightly white edges or core lines showing when the board is die-cut, scored, or folded. For luxury items like jewelry boxes, high-end electronics packaging (such as phone boxes), and prestigious cigarette cases, this ensures a flawless, consistent, and professional appearance from every angle.

The primary feature of this duplex board is its exceptional stiffness and resistance to deformation. The manufacturing process ensures stable lateral quantitative, meaning the density and weight distribution across the entire sheet are consistent. This consistency is paramount for high-speed automated packaging lines, as it prevents warping, twisting, or bowing that can cause jams and misalignments during die-cutting, folding, and gluing processes. A board that remains flat and stable translates directly into higher production yields, reduced waste, and a superior final product that maintains its geometric perfection over time.

Available in an extensive thickness range from a delicate 0.3mm to a substantial 4mm, and a corresponding grammage range of 250 to 2600 GSM, this product line offers unparalleled versatility. A 0.5mm board might be selected for a sleek inner tray of a jewelry box, while a robust 3mm or 4mm board forms the rigid outer shell of a premium smartphone box or a lavish hardcover book. This wide range allows designers and engineers to select the exact specification needed for structural support without unnecessary over-engineering, optimizing both performance and cost.

Supplied primarily as an uncoated sheet, the board provides an excellent, porous surface for subsequent lamination, foil stamping, embossing, and UV coating. The uncoated grey surface offers strong adhesion for these finishing techniques, allowing brand designers to apply luxurious textures, metallic foils, and high-gloss finishes that are permanently bonded to the substrate. For specialized needs, the coating can be customized upon request, providing a ready-made surface for specific printing or finishing requirements.

The customizable inner core is a significant advantage for brands with unique performance needs. While the standard grey core offers excellent all-around performance, the composition can be adjusted to enhance specific properties such as increased rigidity for larger format boxes, improved moisture resistance, or specific flexural strength.

Furthermore, the board can be provided in custom sheet sizes or formats tailored to your production line, minimizing material waste and streamlining the manufacturing workflow. From the initial sample stage to full-scale production, we ensure the material meets your exact specifications for dimension, thickness, and performance.

This Grey Back Grey Board is the material of choice for a vast range of premium packaging and display solutions. Its primary usage includes:

 Providing the rigid structure for pillow inserts and rigid boxes.

 Offering protective strength for high-value gadgets.

 Ensuring a precise and durable closure mechanism.

 Delivering the flat, unbending surface required for these products.

 Supplying the necessary rigidity for free-standing displays.