Recycled Cartonboard (WLC Board)

Paper fibres can be recycled over 25 times in laboratory conditions without losing strength properties. Research by MM Board & Paper and TU Graz shows that fibres maintain their integrity through multiple cycles, providing strong environmental credentials and supporting circular economy goals. The exact number of cycles in the market depend on maturity of recycling systems and various external factors. Recycled cartonboard prevents downcycling of fibres.

Duplex and triplex board are both part of the White Lined Chipboard (WLC) product group and can each consist of multiple layers — in practice, up to ten layers.

The key difference between these two WLC categories is the colour of the reverse side:

• Duplex board has a grey back, while triplex board features a light‑coloured back.
• Triplex board is used wherever the reverse side plays an important role, for example when it is visible or printed. Typical applications include blister packaging and sleeves, such as those used for yoghurt cups. The light reverse side ensures good printability and creates a clean, high‑quality appearance.
• The choice between duplex and triplex board therefore depends less on mechanical properties and more on the visual and printing requirements of the reverse side in the packaging design.

Yes. Food-contact recycled cartonboard (white lined chipboard, WLC, and Coated Recycled Board, CRB) is safe and suitable for selected direct or indirect food contact applications. The risk assessment must consider how the cartonboard is intended to be used, with the safety evaluation focusing on substances that can potentially migrate from the product into food. MM Board & Paper carefully risk-assess the raw materials, production process technology and conditions to ensure that recycled cartonboard is safe for the intended use.