Not a different box, but a substantiated one

The PPWR (Packaging and Packaging Waste Regulation) entered into force on 11 February 2025 and has applied in large part since 12 August 2026; other obligations are being phased in. For corrugated board, the central idea is simple: packaging must be no heavier or larger than necessary for the function it performs.

That may sound strict, but it is primarily a matter of substantiation. A heavy-duty double-wall box that is demonstrably necessary for stacking and the product’s journey remains a defensible choice. A heavy box used simply because it has always been used is not. The difference lies not in the box itself, but in what you can demonstrate about it.

If asked why your box has its particular specification, refer not to the flute type but to the assumptions underlying it. There are five, and each can be recorded in a single line:

• The weight carried by the bottom box. Not the product weight, but the weight of everything stacked above it.
• The storage period. Board loses strength the longer it remains under load. Two days in transit is different from six months in racking.
• The climate. Above a moisture content of approximately 20%, significant strength loss occurs. Unheated storage, sea freight and cold rooms therefore require a larger margin than a dry warehouse.
• The form of transport. A pallet moving from A to B is subjected to different loads from a box passing through a parcel sorting centre.
• The margin you apply. Dry, normal or humid: this choice affects the result more than the flute type.

The last two are represented in the box calculator as a safety factor (3.5 dry, 5.0 normal, 7.0 humid) and a transport factor (1.0 for pallet storage up to 1.35 for parcel delivery). These are not statutory values but practical margins, which is precisely why it is useful to record which factors you selected and why.

This example shows that moving from a dry to a humid assumption almost doubles the required strength. Anyone seeking to reduce the grade will therefore usually gain more from establishing the true climate conditions than from looking for a lighter flute.

Oversizing rarely results from one poor decision. It arises because a range has been simplified over the years, because volume pricing made a larger size cheaper, or because no one remeasured the box after a product change. The effect is usually invisible because an oversized box still works.

Fifty per cent more pallets for the same goods: this is why dimensions carry more weight under the PPWR than grammage alone. It is also why the benefit rarely lies in the box alone: a closer-fitting box requires less void fill, less film per shipment and fewer journeys. The empty space and box range page explains how to identify systematically where that space occurs in your range.

It may then be tempting to reduce the grade as well. Do so only if the strength calculation permits it and you monitor the damage rate. A lighter box that causes more breakage, repacking or returns ultimately uses more material than it saves, which is precisely the opposite of the Regulation’s objective. If a different box style offers more benefit than a different grade, first review the construction in the FEFCO guide.

Corrugated board performs well as a material stream in paper recycling; EU Member States have a recycling target of 85% by weight for paper and board packaging waste by 2030. This is a target for the material stream, not proof that every individual box is straightforward to recycle. The route taken by your box is affected by components that are not paper:

• Coatings and wet-strength additives, which make board resistant to the very moisture used to separate the paper fibres during recycling.
• Plastic windows and non-paper labels, which must be removed from the stream as contaminants.
• Full-coverage or heavy printing, which primarily affects the quality of the secondary fibre.
• Tape and closures — small in relative terms, but still part of the same assessment. The relevant considerations are explained on the tape and box closure page.

The scale of the effect depends on the quantity and processing route, and the European design criteria and recyclability performance grades are still being developed. It is therefore not currently possible to give each box a definitive score. What you can do is record, for each box, which non-paper components it contains, why they are necessary and whether an alternative can perform the same function. This is the same form of substantiation described above, but applied to design rather than strength. See the recyclability and packaging design page for more information.

• EUR-Lex — Regulation (EU) 2025/40 — the Regulation itself. Opens in a new window.
• Netherlands Enterprise Agency (RVO) — EU legislation: packaging requirements (PPWR) — Dutch government information. Opens in a new window.
• Verpact — All about the PPWR — timeline and implementation in the Netherlands. Opens in a new window.

Content reviewed on 20 August 2026 against the sources above.

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