Material
Corrugated Board
E-flute, B-flute, and double-wall. The substrate that protects the product through global shipping — and the print surface for branded mailers.
Flute profiles
E-flute 1.5mm · B-flute 3.0mm
Wall options
Single-wall, double-wall (EB, BC)
Liners
Kraft, white-top, fully bleached
Print methods
Flexo, digital (E-flute), offset (E-flute)
Best for
Mailers, shipping boxes, ecommerce
Edge crush test
32 ECT (single) · 44 ECT (double)
Recyclable
Yes
MOQ
50 units
Overview
What it is.
Corrugated board is the structural sandwich of paper: a fluted (wavy) medium glued between two flat liners. The flute gives the board its compressive strength and cushioning properties; the liners carry the print. Together, they create a substrate that is light, strong, and recyclable — the dominant shipping and protective packaging material worldwide.\n\nWe stock E-flute (1.5mm, the print-fidelity choice), B-flute (3.0mm, the structural choice), and double-wall combinations for heavy products. We also offer white-top, kraft-top, and full-bleed print variants depending on whether the unboxing experience matters to your brand.
E-flute vs B-flute: when to choose which
E-flute is the right choice when the corrugated box is also the unboxing experience. At 1.5mm, it is thin enough to take high-fidelity print (we run offset and digital on it), but structurally adequate for most products under 5kg. This is the format that dominates the DTC ecommerce market — branded mailers from Apple, Glossier, and most direct-to-consumer brands use E-flute.
B-flute is the structural choice. At 3.0mm, it offers more crush resistance and stacking strength, but the print fidelity is lower (the flute is visible through the liner and limits detail). Use B-flute for shipping cartons, for heavy products, and for any box that needs to survive a parcel network. If you want both print quality and structural strength, move to double-wall BC-flute or EB-flute.
Sustainability of corrugated
Corrugated is the most recycled packaging material in the world. In the US, the recovery rate is over 90%; in the EU, over 80%. The fiber can be recycled 5–10 times before the network degrades to the point of downcycling.
We use FSC-certified liners and mediums on request, and we publish the recycled content percentage of every order. For brands with strict sustainability positioning, we offer 100% recycled corrugated with no virgin fiber.
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Frequently asked
Questions about corrugated board.
What is the difference between E-flute and B-flute?
E-flute is 1.5mm and accepts high-fidelity print. B-flute is 3.0mm and is more crush-resistant but lower print fidelity. Choose E for branded mailers, B for shipping cartons.
Can corrugated be printed in full color?
Yes on E-flute — we run offset and digital. On B-flute, the flute shows through and limits fine detail; we suggest flexo for bold designs.
Is corrugated food-safe?
Yes — it is FDA-compliant for dry food contact. For wet or fatty foods, we add an inner food-grade liner.
How much weight can double-wall corrugated hold?
Up to 40kg static load, depending on box dimensions. We can run edge crush tests and box compression tests on request.
What is the most sustainable corrugated option?
100% recycled with no virgin fiber. We publish the recycled content and FSC status of every order.
Do you ship flat or assembled?
Flat — corrugated is die-cut and shipped knocked-down (KD) to minimize freight volume. Assembly is manual, taking 15–30 seconds per box.
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