The company highlighted that these new tannages produce the “lowest carbon leather for the auto sector”. They will reportedly increase the bio-content and end-of-life biodegradability properties of its leather, as well as remove fossil fuel, oil-derived components and heavy metals from its processes and products to achieve a circular future for natural leather.

BioTan is a hybrid technology that incrementally increases the bio-content within the chrome-free leather tanning process to above 50%. Meanwhile, FreeTAN offers a full replacement of existing tanning chemistry with compostable technology, and is completely chrome-free, heavy metal-free and aldehyde-free with “promising” biodegradability properties.

Simon Cook, Group Technical Director at Bridge of Weir Leather, said: “For over 20 years, we have invested in pioneering new initiatives which optimise and improve sustainability, quality and productivity. With our new BioTAN and FreeTAN innovations, we are further raising the bar for environmentally sustainable leather standards, these revolutionary technologies being a vital next step on our journey to increase the biobased renewable carbon content of our leather, further cementing our key role in supporting car makers’ environmental targets.

“What’s more, this is only the start. The leather of the future for us is 100% biobased content, completely chrome-free, heavy metal-free, aldehyde-free and entirely biodegradable. We are committed to net zero for our operations (Scope 1 and 2) by 2025 – ahead of Scotland’s net-zero ambitions – and delivering zero waste to landfill by the same year, further fortifying our sustainability pledges.”