Ideal for fresh and processed food products
Ideal for fresh and processed food products

MetsäBoard Natural WKL

MetsäBoard Natural WKL is an uncoated white-top kraftliner suitable for flexo printing, available in a basis weight range of 135-200 g/m².

Safe for the corrugated packaging of fresh and processed food products, MetsäBoard Natural WKL offers excellent strength stability across its weight range and in different climate conditions. Its consistent quality is achieved through advanced production methods and strict online control, ensuring smooth and cost-efficient convertability. MetsäBoard Natural WKL is ideal for retail packaging that has large areas of colour print and requires excellent contrast for line illustrations.

MetsäBoard Natural WKL is made from fresh fibres, traceable to source in sustainably managed northern forests. All of Metsä Board’s products are manufactured under the highest environmental and safety standards, and hold PEFCTM and FSC® chain of custody certification.


  • shelf-ready and retail packaging
  • fruit and vegetables
  • processed food
  • consumer electronics 

Product specifications

Specification language
Product nameMetsäBoard Natural WKL
Product descriptionUncoated white top kraftliner
Product typeWhite kraftliners
End useRetail-ready packaging, Foods, Beverages, Consumer electronics, Consumer durables, General packaging
Printing methodFlexo preprint, Flexo postprint
Food contactEU Regulation (EC) No 1935/2004, USFDA21CFR§176.170*, USFDA21CFR§176.180*
MillMetsä Board Kemi
Paper profileMetsäBoard Natural WKL (pdf)
*Please contact Metsä Board for details of country-specific restrictions and/or limitations.
Open specification PDF


Technical informationSelect unit :
Grammage g/m² 135175200
Moisture content %
Thickness μm 155200230
SCT cd kN/m
Internal Bond J/m² 350350350
Smoothness top ml/min 300480560
Brightness top % 757575
Water absorption top g/m² 252525
Porosity s 606060

White kraftliners range

  • MetsäBoard Natural WKL Bright

  • MetsäBoard Classic WKL

  • MetsäBoard Pro WKL

  • MetsäBoard Prime WKL