Honeycomb Cardboard Board Thickness: Choosing the Right Grade

Thickness is the first number most buyers read on a honeycomb board specification and the one most often misread. This guide to honeycomb cardboard board thickness covers how the dimension is built, what it does and does not predict about performance, and how to choose a grade that carries the load without adding needless freight cube or buying material the job never uses.

How board thickness is built

Honeycomb board is a sandwich structure: kraft facing sheets bonded to an expanded paper core. Board thickness is essentially core height, available in a wide range from roughly 10 mm to 50 mm and beyond for heavy structural panels. Because the core is mostly air, adding thickness increases stiffness and cushioning depth with very little weight gain — the property that separates honeycomb board from solid board and plywood at the same panel dimensions. That is why thickness selection is a performance decision first and a cost decision second.

Matching thickness to the load

These ranges are starting points for selection, not a standard:

• 10–15 mm: surface protection, carton dividers, light cushioning layers

• 20–30 mm: pallet separators, furniture panels, medium-duty cushioning

• 40–50 mm and up: heavy structural panels, pallet decking, high-compression bracing

A heavier product does not automatically call for a thicker board. Core cell size, facing grammage and panel area all interact with thickness, so the reliable method is to pick a candidate grade, run compression or drop tests, and adjust from the test result rather than from a catalog page.

Thickness versus freight cost

Every added millimeter of thickness raises stack height and per-shipment cube even when the weight barely moves. For export programs with fixed container pack plans, an overspecified board quietly wastes load capacity and inflates the landed cost of protection that was never needed. Buyers do better specifying the thinnest grade that passes the agreed tests, then holding that grade constant across shipments so pallet pack, container count and freight quotes stay predictable.

Verifying the grade at receiving

Thickness tolerance, core cell size and facing grammage belong in the purchase order, not in an email thread. Spot-check samples at delivery at several points across the panel, and ask for batch records covering the production run that shipped. A supplier that cuts and laminates in-house can usually produce those records faster than one assembling orders through trading intermediaries. Foshan S.Y.T Group (SYTPACK) has manufactured honeycomb boards, cartons and pallets since 1996, and buyers can confirm grade options directly with its production team before committing to a specification.