Oral
Abstract
Research summary supplied by the authors
Zeolites are valuable pretanning agents that enhance the performance and quality of leather. By introducing masking agents and hydrotropic substances, the usage properties of the leather are significantly improved, particularly in terms of softness and a round, supple handle. The biodegradability of the pretanned/tanned leathers was assessed using ISO 20136, revealing a 94% degradation rate compared to non-tanned collagen—considerably higher than that achieved with conventional tanning methods. Additionally, compostability, as measured according to ISO 20200, was found to be high, further reinforcing the environmental benefits of this approach. In this context, the role of vegetable tanning agents used in conjunction with the zeolite system is explored, as they have a substantial influence on the compostability of the resulting leather. Furthermore, a life cycle assessment (LCA) indicates that this novel tanning method offers notable environmental advantages over traditional processes, particularly chrome tanning. Finally, the advantages and potential drawbacks of this innovative combined tanning method are discussed, providing a comprehensive evaluation of its sustainability and practical applications.