Södra invests in tannin extraction line at Värö

Using bark for tanning is not new, but Södra is now industrializing the process in which the tanning substance is extracted from the bark and transformed into a product for tanning leather.

This new tannin can be used to process leather in a more environmentally friendly way.

Now is the time to unite and maximise the potential of every tree, exploring innovative applications for tannin collaboratively. Together, we can develop fossil-free products and contribute to a more sustainable future, said Viktor Odenbrink, Sales Director, Södra Bioproducts.

Harnessing the power of tannins and sustainable family forestry

Tannins are polyphenol oligomers and polymers present in plant tissues with a function to protect against herbivores and parasites.

Tannins can form complex bindings with other plant constituents such as polysaccharides and proteins, and therefore have cross-binding properties that can be used during leather tanning or in adhesives.

Furthermore, tannins have antioxidant properties.

Södra will produce large volumes of this type of tannin, and the new line will have the capacity to produce tannin for millions of square metres of leather.

Södra says that it is open to other possible uses and new markets where this sustainable tannin could be put to good use as part of the transition to a fossil-free society.