Even the R&D department of Tecnochimica has long accepted the challenge of metal free tanning.
The Tuscan chemical-tanning company that has established itself on international markets thanks to its vast range of chemicals offered, all based on quality and respect for the environment (synthetic tannins, resins, oils and fatliquors, auxiliaries for liming, dyes and finishing products) has developed a system for tanning hides without the use of metal. We talked about it with Simone Gelli, at the head of the company in Castelfranco di Sotto (Pisa) together with three partners.

What is Tecnochimica’s approach to this theme?
“When you think of soft, elastic and fluffy leather, the “hand” of chromium or aldehyde tanning immediately comes to mind. For our metal free process we have chosen these characteristics as a reference and we can guarantee not only that we have achieved our goal, but also that some characteristics have even been improved”.
What does your metal-free tanning system consist of?
“We used synthetic tannins, polymers with low formaldehyde and free phenols besides fatliquors entirely produced by us in order to obtain a high level of affinity with our metal-free pre-tanning and obtimising the results”.
What kind of experience did you have on the market?
“In order to consolidate our research, we have commissioned local professionals to produce various items for the leather goods sector and the footwear sector in order for us to have an exchange with well-known craftsmen who have confirmed the effectiveness of our system”.
What were the results?
“The product destined for the footwear sector has shown characteristics of excellent resistance to mechanical stress of the tack-lasting machine and seat and shank lasting machine, as well as the product destined for the leather goods sector which can be folded along four edges without the grain yielding at all”.
Tecnochimica’s technical staff is available to tanners to carry out tests and develop new projects.