Single Wall vs. Double Wall Corrugated Board: Which Is Right for Your Boxes?

Q1: When evaluating single wall vs double wall corrugated, which offers better print surface quality?

Single-wall micro-flutes (like E-flute) offer a flatter exterior surface with minimal “washboarding”, making them superior for high-resolution offset graphics. Double-wall board is thicker and primarily designed for heavy-duty protection.

Q2: What is the Burst Strength (Mullen Test) versus Edge Crush Test (ECT)?

The Mullen Bursting Test measures the pressure required to puncture box board faces. The Edge Crush Test (ECT) measures top-to-bottom compression strength, directly correlating with how high cartons can be stacked on warehouse pallets.

Q3: When comparing single wall vs double wall corrugated, when should you upgrade to double wall?

Upgrade to double-wall board (such as BC-flute or EB-flute) when cargo payload weight exceeds 15 kg – 20 kg (33 – 44 lbs) or when shipping fragile items through harsh international transit routes.

Q4: How does paper liner weight (GSM) impact corrugated box rigidity?

Corrugated board strength depends on both flute profile height and the basis weight of the kraft paper liners (e.g., 140  gsm, 170  gsm, or 230 gsm). Higher liner weights deliver greater puncture and moisture resistance.

Q5: Is white corrugated board weaker than natural brown Kraft corrugated board?

No. Bleached white kraft liners and natural brown kraft liners share similar tensile strength specs when produced at equivalent paper basis weights (GSM).