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Position papers

Sharing our knowledge: Position papers

At Nera, we believe that sharing our extensive knowledge on zeolite tanning contributes to a more sustainable leather value chain. Therefore, we are making make our insights, experience and knowledge of Zeology available through the University of Zeology. As we are continuously gaining more insights, we will be making new knowledge available regularly.

Learn more about how you can contribute to a more sustainable leather value chain, by choosing zeolite-based tanning with Zeology. Dive in!

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).
What is the difference between ‘biodegrading’ and ‘composting’?
The first stage of biodegradation is biodeterioration, e.g., black spots on bananas – surface breakdown.
Biodegradability of Zeo White
The biodisintegration of Zeo White is found to be rapid and results in almost complete compostability and aqueous biodegradation.
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.
What is a metal tannage?
The type of metal tannage that receives the most media attention is the chrome tannage.
The tanning processes
Discover how the Zeology tanning processes work.
The main benefits of Zeology
The main benefit of Zeology is for the environment: less polution. Discover the benefits for brands and tanneries.
Zeology & sustainability
Zeology’s main benefit is for the environment: less pollution, less discharge of chemicals in waste and waste water.
Zeolite explained
What are zeolites and how can it be used in leather tanning?
Zeology and waste stream
The waste streams that arise from the tanning and tanned leather are typically shavings, clippings and sludge.
Tanning chemicals: what are the options?
Read all about chrome tanning, vegetable tanning and chrome-free tanning methods.
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.