bio-circular leather

Ecotan is an innovative leather tanning technology developed by Silvateam, world leader in the production of natural tannins, in order to produce a new class of leather that has excellent performance standards, is safe for all and is a truly bio-circular material.


Tanned with a combination of natural and synthetic tannins, as well as other harmless biopolymers, Ecotan leathers are free of hazardous substances such as chrome and glutaraldehyde, creating a safe, healthy and comfortable environment for the end user. At the end of their useful life, both leather articles and cuttings can be recycled into fertilisers suitable for organic farming, returning to the earth as useful nutrients instead of ending up in landfills.


Over 20 of the top tanneries in the world have joined the Ecotan project and are ready to supply bio-circular leathers from raw materials of different origins, in a wide range of finishes and colours.

This new frontier in sustainable leather solutions comes as a result of a decade of continuous innovation conducted at Silvateam Research & Development centers in partnership with several universities, research institutes, tanneries and recycling companies.

The beginning

Why Ecotan was born

Ecotan is great step forward towards an even more sustainable tanning process, valid for the entire supply chain. Developed by Silvateam, this innovative technology allows for the production of metal-free and glutaraldehyde-free leathers which can be recycled at the end of their life-cycle.

We asked Antonio Battaglia, director of Silvateam’s Leather Business Unit, and Eric Poles, project development and sales manager, to help us better understand the features of the Ecotan tanning system and how this project can offer innovative solutions for the entire sector:

“Being specialised in the production of plant extracts, Silvateam has always focused on sustainable products – states Battaglia. Aware of the great demand for recyclable materials coming from the market and fashion brands, we developed an innovative tanning technology to allow both tanners and brands to answer the call”.


What bio-circularity means

The concept of bio-circularity is worth investigating:
“We are talking about BIO because the tanning process is based on products of natural origin and CIRCULAR because both leather scraps and – once the necessary supply chain has been created – finished articles can be recycled into a fertiliser. This can be done thanks to an acidic hydrolysis process by our partner Fertilizzanti Certaldo”.

What pushed you in this direction?
“The collaboration with American sustainable footwear consultant Pete Lankford, was crucial since he encouraged us to expand leather’s circularity story by exploring the pathway of finding a new use for leather articles. Over the years, Silvateam has done a lot of research on the sustainability of tanning products, measuring the countless advantages offered by leathers tanned with natural tannins. Recently, our researchers have reached a true technological breakthrough, obtaining high quality, performing leather that can transform a waste material into a resource for our planet. In this way, leather can join a perfect circular economy model by returning to the earth as a useful nutrient”.


Why Ecotan is recyclable

But what is it that allows Ecotan leather to be recyclable?
The process developed by the Silvateam laboratories combines tannins of vegetable origin, sustainable and certified PEFC (Programme for Endorsement of Forest Certification) with innovative bio-polymers, harmless to humans and the planet, as proven by analyses and tests carried out by third parties.

“The resulting tanning process – they explain – leads to higher performance compared to wet white leathers with a wide range of colours and finishes”.

How did these results come about?
“In a nutshell – Eric Poles explains – we have revised traditional vegetable tanning and made it more performing by combining natural extracts such as chestnut, quebracho and tara tannin, with synthetic products that improve the final properties of the leather, from tear strength to light and heat fastness, together with softness and touch. We also like to point out a curiosity – states Battaglia. For the first time we used gallnut tannins to make leather, an extract which is normally used to filter champaign”.


Partners - Production - Costs - Destinations

The fact that this technology can be used to tan leathers of various types and origins is another fundamental advantage of Ecotan.

To demonstrate this, Silvateam has involved several tanneries from all over the world in the project (such as Volpi, Valdarno, Vesta, Polaris and La Scarpa in Italy, Haas 1842, Hiriar and Mégisserie Richard in France, the Brazilian giant JBS, Panamericana del Bajío and Wyny in Mexico, Sepiciler in Turkey, amongst others).

Tanneries completely different from each other in terms of size, processing and raw material type.
“Each partner managed to obtain high quality bio-circular leathers and are now ready to offer Ecotan leather articles to the market”, they explain.

Production systems and costs do not seem to be a problem: “One of the winning features of the Ecotan tanning technology is that nothing needs to be changed from an industrial point of view while production costs are comparable with those of a wet-white tanning”, Poles explains. Subsequent tests have also shown that leathers processed with Ecotan are very versatile in terms of use, easily lending themselves to the production of any type of finished article, such as footwear, leather goods, car interiors and furnishing items.


Ecotan ensures wellness and comfort

Another interesting aspect concerning the applications of this technology in the footwear sector is the ability of these leathers to limit bacterial proliferation.

“Scientific studies that we have been carrying out for five years have demonstrated the high hygroscopic and breathable properties of leathers treated with natural tannins. This makes them ideal for producing uppers, linings and insoles as they create an environment inside the shoe capable of maintaining the natural bacterial flora of the foot unaltered, avoiding the proliferation of bacteria responsible for the formation of bad odours and promoting the well-being of our skin”

Battaglia and Poles explain. In this regard, Silvateam is completing the process of registering tannins as natural biocides in accordance with the European Regulation No. 528/2012.


How Ecotan was perceived

As for market feedback, interest is very high. Silvateam is talking directly to brands to present the features of the project.

“The attention towards sustainable materials is huge at the moment – states Battaglia – and there are many fashion houses that are already developing prototypes of footwear and bags with Ecotan tanned leathers that I hope we will soon see in shop windows. A sneaker line is already on the market but at the moment we are not allowed to reveal the name”.


the complete solution for recyclable leathers

As the world leader in the production of natural tannins, it comes to no surprise that Silvateam chose to base its Ecotan leather formulations on a combination of natural tannins and harmless man-made additives. “With this project – states Leather BU Director Antonio Battaglia – we wanted to create a new class of bio-circular leathers that are safe for both us and the earth”. Part of this vision meant ensuring that Ecotan leathers are both metal-free and glutaraldehyde-free, as well as avoiding any substance listed in the ZDHC Manufacturing Restricted Substances List (MRSL).
But the sustainability of Ecotan leathers is not simply a matter of products used for tanning: for Silvateam, a truly ‘green’ approach to leather must start from the sustainable sourcing of raw materials and go all the way to the end of the leather article’s useful life. For this reason, the Ecotan project follows leather throughout its entire journey, from ‘birth’ to ‘life’ and ‘next life’.

About SilvaTeam

Founded in 1854 near Cuneo, in Piedmont, the Silvateam company is the leading Italian producer of tanning chemicals and one of the top ten worldwide. In addition to the tanning industry, which absorbs about 50% of its production made in its own factories in Italy, Argentina and Peru, its tannins and plant extracts are used in the food sector, in the wine-making industry and in animal nutrition.

Close Menu

Leave a comment on this article

Let us know your opinion and share your experience

Subscribe to the Arsutoria Magazine newsletter

Get brand new content sent straight to your inbox. Choose your interests, hit Subscribe and never miss an article again.

*You will receive an email to confirm your subscription. By clicking Subscribe you are agreeing to receive promotions, offers and newsletters from EdizioniAF via email. We will never share your data with any third party and you can unsubscribe at any time. For information on how we process your personal information, please see our Privacy Policy.​

* You will receive an email to confirm your subscription.

By clicking subscribe you are agreeing to receive promotions, offers and newsletters from EdizioniAF via email. We will never share your data with any third party and you can unsubscribe at any time. For information on how we process your personal information, please see our Privacy Policy.