The Ultimate Guide to Kraft Paperboard: Definition, Benefits, Applications & Selection
If you work in packaging – as a packaging engineer or a B2B procurement manager – you’ve probably heard of “kraft paperboard”. But what exactly is it? How is it different from kraft paper? And what do single‑side and double‑side mean? Should you choose virgin, recycled, or hybrid? This article answers all these questions in plain language – and focuses entirely on kraft paperboard, not ordinary kraft paper.
1. What is Kraft Paperboard? (And the Single‑Side / Double‑Side Difference)
Kraft paperboard is a high‑grammage, high‑stiffness industrial paperboard. It is used for premium rigid boxes, heavy‑duty industrial packaging, POP display stands, and eco‑friendly shopping bags – anywhere that requires strength and dimensional stability.
The word “Kraft” comes from German, meaning “strength”. Traditional kraft paperboard is made from 100% unbleached sulphate wood pulp (virgin fibre). These long, strong fibres give it superior burst resistance, tear strength, and stiffness.
Do not confuse it with kraft paper:
- Kraft paper is thin (30–150 g/m²), flexible, and used for bags, wrapping, envelopes.
- Kraft paperboard is thick (300–650+ g/m²), rigid, and structural. It can bear loads without corrugation. Think of kraft paper as “skin” and kraft paperboard as “board”.
Our kraft paperboard is available in two configurations:
- Single‑side kraft paperboard – One side has a smooth kraft top layer (natural or white), the other side is a rougher base layer. Ideal when only the outer surface needs to be attractive. Lower cost.
- Double‑side kraft paperboard – Both sides have a high‑quality kraft top layer. Both sides are smooth, printable, and ready for decoration. Perfect for premium packaging where both inside and outside are visible or need printing, foil stamping, or lamination.
Both configurations use a hybrid fibre structure: a virgin pulp top layer (single or double) combined with a recycled pulp core. This gives you nearly the strength and feel of all‑virgin board, at 70–80% of the price, while meeting FSC Recycled certification requirements.
2. Five Core Advantages of Kraft Paperboard
1. High flatness – zero warping
Ordinary recycled boards often warp when exposed to humidity, causing boxes to twist after assembly. Our kraft paperboard uses balanced fibre tension and lamination control – the same structure on both sides ensures dimensional stability even in high‑humidity environments. This is critical for luxury rigid boxes and large display stands.
2. Excellent burst strength & stiffness
Take a 450 g/m² kraft paperboard: burst strength can exceed 800 kPa, and ring crush (RCT) over 3.0 kN/m. A single sheet can bear tens of kilograms without corrugation – ideal for heavy‑duty industrial pallet decks or tool boxes.
3. Superior printability
The smooth top layer absorbs ink evenly. Whether you use offset, screen, UV, or hot foil stamping, you get sharp graphics and vibrant colours. Double‑side kraft paperboard allows printing on both surfaces – perfect for high‑end boxes where the interior is also on display.
4. 100% recyclable – supports ESG goals
Kraft paperboard is made entirely of plant fibres, with no plastic coating or lamination. After use, it goes straight into the waste paper stream. We can supply FSC Recycled or FSC Mix certification to help your brand meet European and North American green procurement thresholds.
5. Single‑side or double‑side – no wasted cost
If only the outside needs to look good, choose single‑side and save 10–15%. If both sides will be seen or printed, choose double‑side. We don’t push the most expensive option – only the most suitable one for your project.
3. Three Main Types of Kraft Paperboard
| Type | Fibre composition | Pros | Cons |
|---|---|---|---|
| Virgin kraft paperboard | 100% virgin sulphate pulp | Highest strength, best moisture resistance, stable printing | Expensive, higher carbon footprint |
| Recycled paperboard (testliner‑type) | 100% waste paper | Cheap, eco‑friendly | Poor stiffness, warps easily, rough surface |
| Hybrid kraft paperboard (recommended) | Virgin top layer(s) + recycled core | Moderate cost, excellent flatness, good printability, balanced properties | Performance between virgin and recycled |
Our hybrid kraft paperboard uses virgin pulp on one or both surfaces and recycled pulp in the core. It is dense, tough, resistant to folding and compression, and has a smooth, uniform surface for consistent ink acceptance. It solves the warping problem of recycled board at 70–80% of the cost of all‑virgin board.
4. Main Application Areas for Kraft Paperboard
Thanks to its high strength, flatness, and printability, kraft paperboard is used in:
- Premium rigid boxes & gift boxes – Smartphone boxes, earphone cases, watch boxes, cosmetics packaging, tea, and wine boxes. Perfect for one-piece boxes, allowing you to print and add shiny foil directly onto the surface without needing an extra layer of plastic film. It stays perfectly flat and will not crack at the folded edges.
- Heavy‑duty industrial packaging – Car parts, hardware tools, shipping dividers, pallet pads, and corner protectors. Used to directly replace heavy wood boards because it is lighter, cheaper, and does not require any chemical spraying or heat treatment for international shipping.
- Store displays & stands – Supermarket promotion stands and counter displays. It gives you the high stiffness needed to stay upright without bending under the weight of products, while ensuring clean, high-quality printing on both sides.
- Strong eco shopping bags – Bags for luxury brands, clothing shops, and premium supermarkets. These bags easily hold heavy loads, stand straight up, and are completely biodegradable, making them twice as thick and sturdy as ordinary paper bags.
- Eco-friendly hangers & puzzles – Strong clothing hangers, puzzle boards, and premium stationery. It is tough enough so clothing hangers never bend or sag under heavy coats, and it stays perfectly flat so puzzle pieces fit together smoothly without curling up over time.
5. GSM Selection Guide for Kraft Paperboard
GSM = grams per square metre. Higher GSM means thicker, stiffer, and more durable board. For kraft paperboard, focus on these ranges:
| GSM range | Recommended applications | Recommended structure | Notes |
|---|---|---|---|
| 300–350 | Light shopping bags, inner trays for gift boxes, file folders | Single‑side | Best cost‑performance, enough rigidity for light duty |
| 350–450 | Standard gift boxes, electronics boxes, display panels | Double‑side | Main workhorse – balance between cost and appearance |
| 450–550 | Heavy tool boxes, end‑cap displays, puzzle boards, industrial dividers | Double‑side (or high‑gram single‑side) | Requires high stiffness and print quality |
| 550–650+ | Industrial pallet pads, machinery spacers, plywood replacement | Single‑side or double‑side (depends on visual needs) | Virgin or high‑percentage virgin hybrid recommended |
Selection tips (three simple steps):
- Decide if double‑side is needed – If both inside and outside are visible or printed, choose double‑side. If only the outside matters, single‑side saves money.
- Consider the shipping environment – For humid conditions, cold chain, or long sea freight, go one GSM higher or choose virgin fibre.
- Check environmental certifications – Always ask your supplier for FSC Recycled or FSC Mix documentation.
The above guidelines work for most standard projects. If you already have specific product dimensions, load requirements, or a target budget, share those parameters with us – we will help you match the most cost‑effective single‑side or double‑side kraft paperboard solution.
Bottom line: Kraft paperboard is thick, stiff, flat, and prints beautifully. We offer single‑side to save you money, and double‑side to make both surfaces look premium. Whether you are making a smartphone box or a machine pallet pad, choosing the right kraft paperboard wins half the battle.
References
- SCA Kraftliner technical data – burst strength and SCT values for virgin kraftliner at 115 gsm.
https://www.sca.com/en/containerboard/our-products/sca-kraftliner-white-top/ - FSC Recycled certification – official standard for recycled fibre content and chain of custody.
https://fsc.org/en/label
Author Profile
-
HONGTUSCENERY is a professional manufacturer of composite paperboard,
providing sustainable and customized packaging solutions for global brands.
With nearly 20 years of industry experience, we focus on material performance,
structural strength, and green supply chain development.
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