Credit: Taddei Manzi & C.
At the heart of the green transformation of tanning, the challenge is no longer just to reduce impact, but to rewrite the very formula of leather itself. From this vision comes the bio-based system developed by Taddei Manzi & C., a technology that rethinks traditional stages—from rewetting to tanning—to eliminate and drastically reduce conventional chemical agents.
The ingredients of this new recipe are bioactive and renewable: probiotic degreasing agents, anti-wrinkle components derived from organic vitamins, and natural oils with a high bio-based carbon content. Enzymes, produced in Italy, replace part of the chemical reagents and act as reducing agents, limiting the use of sodium sulfide. Even hydrated lime finds an eco-friendly substitute capable of reducing processing sludge.
At its core lies a circular economy principle: surfactants are derived from the fermentation of bacterial strains from the agri-food industry, transforming production waste into new resources.
The results are tangible: a reduction in water consumption of over 75%, equal to more than 58 billion liters saved compared to conventional methods. “With the use of a product consisting of a mixture of organic compounds, the pickling phase has been replaced by a pre-tanning step that reduces acids and salts—such as sodium sulfide, ammonium chloride, hydrated lime, and sulfuric acid—by 80%, and chromium by 70%,” explain the technical staff.
The simplification of the process shortens production time by about 24 hours, delivering energy savings and direct economic benefits. But the real achievement is qualitative: physical-mechanical tests and aesthetic evaluations confirm high-performance, versatile leathers suitable for both chrome-tanned and metal-free articles. Already applied on an industrial scale, this system proves that innovation is not a laboratory hypothesis but a concrete reality: chemistry once again becomes the key to smarter, more sustainable leather.
