Enter the world of sustainable leather tanning Learn how you can contribute to a more sustainable leather value chain, by choosing zeolite-based tanning with Zeology. We also share our knowledge and insights on relevant topics like the leather manufacturing process, waste streams and biodegradability. Dive in! It’s time to revolutionize leather tanning Enter the world of sustainable leather tanning and discover the science behind Zeology. Watch the video. Read more Whitepaper: Biodegradability and disintegration of leather Download the Whitepaper 'Biodegradability and disintegration of leather'. Read more How to tan leather? There are 6 common steps in tanning leather. It starts with soaking and liming. Read more Three important certifications for Zeology Quality and safety of our products are of the utmost importance to us and certifications help us prove that Zeology complies with international industry standards and legal requirements. Read more Recycling vs. composting. What makes sustainable sense for the fashion industry? In Forbes’ article ‘Mass Recycling Of Fashion Is Years Away; Is Composting An Alternative?‘ , Brooke Roberts-Islam, dives into the possibilities of composting as a (more) sustainable option to recycling. Read more Responsible sourcing of aluminium/bauxite for Zeology As of 2022 Nera has been using zeolite that has been produced from ATH that is certified according to the Aluminium Stewardship Initiative1 (ASI) standards. Read more Publication: Modified zeolites as sustainable alternatives to traditional tanning chemistries The journal Green Chemistry has published a scientific paper on modified zeolites (Zeology) as the sustainable, versatile and game-changing alternative in leather tanning. Read more Nera’s glossary. What’s in a name? Zeology, Zeo White, Zeology Leather, zeolite... It sounds almost the same, but it's not. We are happy to explain to you the differences. Read more Wet end processing of Zeology tanned leather How to produce crust leather from Zeo White? Zeology tanned leather is different compared to chrome and glutardialdehyde (GDA) tanned leather. These are the differences for wet end processing. Read more Masterclass Circularity Watch the replay of our masterclass about circularity in the apparel and automotive industry. You will gain practical tips and insights how you as a brand make the shift to circular. Read more Responsible Yak Tanning with Zeology in the Tibet Autonomous Region Zeology is taking part in an exciting, high-altitude journey in the Tibet Autonomous Region in China. Together with ChromeFree Leather Alliance and The Third Pole of The Earth Leather Industrial Co., Ltd. we are proud to showcase responsible Zeology tanned Yak Leather. Read more Fertilizing your garden with old shoes? PUMA is making it happen A second life for your sport shoes, as a fertilizer for your garden. It can potentially help to diminish billions of kilograms of waste. In The Netherlands, waste processing company Ortessa is performing tests on the compostability of PUMA sneakers. Read more Zeology ≠ zeolite 4 reasons why Zeology is not just zeolite. Ensure that you, as a brand or tannery, are working with ‘the real thing’. Read more Are Zeology leather products available? The answer is: yes! Zeology leather is commercially available and you can already find it in footwear, car seats, bags and other items. Read more How To Work With Zeology – FAQ We have gathered the frequently asked questions about How To Work With Zeology and answered them in one document. Free download. Read more Masterclass ‘How to work with Zeology’ Watch a step-by-step lecture on how to work with Zeology and how to get optimal results. The Q&A is also available (pdf). Read more FAQ Biodegradability Can leather be biodegradable? Get your answers to the most frequently asked questions. Read more On what types of skin can Zeology be used? Zeology tanning can be used for both bovine hides (e.g. bull, cow, buffalo, yaks) and ovine skins (e.g. sheep, goat). Read more What is the difference between ‘biodegrading’ and ‘composting’? The first stage of biodegradation is biodeterioration, e.g., black spots on bananas – surface breakdown. Read more Is Zeology tanned leather more biodegradable than chrome tanned leather? Zeology tanned leather does biodegrade quicker than the traditional tanning technologies. Read more Biodegradability of Zeo White The biodisintegration of Zeo White is found to be rapid and results in almost complete compostability and aqueous biodegradation. Read more Masterclass: Biodegradability of Leather From hide to shoe. How can leather stay biodegradable? Watch the replay of our online Masterclass. Read more The leather making process: step by step How is leather made? How to source the most sustainable leather? An overview. Read more The science and chemistry behind Zeology An in-depth and scientific-based explanation of how Zeology and zeolite works. Watch the movie. Read more Zeology, a perfect fit for white leather Zeo White's bright white color enables white leather, and lighter and brighter colors than were ever possible before. Read more Download: Technical Data Sheet An overview of technical information about Zeology's product characteristics and the tanning process . Read more What is a metal tannage? The type of metal tannage that receives the most media attention is the chrome tannage. Read more The tanning processes Discover how the Zeology tanning processes work. Read more The main benefits of Zeology The main benefit of Zeology is for the environment: less polution. Discover the benefits for brands and tanneries. Read more Download: Zeology Information Kit A ready-made document with the basics, benefits and FAQ's on Zeology. Including a basic and technical glossary. Read more Frequently Asked Questions Of course you want to know more. Find the answer to your question. Read more Zeology & sustainability Zeology’s main benefit is for the environment: less pollution, less discharge of chemicals in waste and waste water. Read more What is zeolite? Zeolite explained What are zeolites and how can it be used in leather tanning? Read more Whitepaper: Zeolite & metals When it comes to tanning, and possible undesirable side effects, media attention is mostly focussed on chrome tanning. What is metal tanning? Read more Zeology and waste stream The waste streams that arise from the tanning and tanned leather are typically shavings, clippings and sludge. Read more Tanning chemicals: what are the options? Read all about chrome tanning, vegetable tanning and chrome-free tanning methods. Read more Effluent Treatment Plant (ETP) In the Effluent Treatment Plant, all the liquid streams of the Zeology tanning process are treated to be reused or ready for disposal. 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