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In addition to machinery, Erretre has also engaged in the creation of ad hoc copyrighted processes and procedures for specific work methods and provided support during the various leather processing phases.

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Chemical Milling®

Process designed to optimise product injection

Our internationally patented technology allows operators to directly modify the leather settings during the milling process.

We designed our Chemical Milling® technology to allow several secondary operations to be performed during the milling process. The advantages of Chemical Milling®: production flexibility and consistency on large-scale production lines, occupational safety and efficiency and environmental protection.

New generation milling drum

Black Line

The new milling drums with cutting-edge technological innovation, a comprehensive user-friendly software at the service of the customer, and an elegant and refined design.

Automatic drum


Technologically advanced concept for the milling, drying, drum conditioning, dry leather finishing and automatic unloading phases.

Cold Milling®

Low temperature milling

The innovative Cold Milling® technology provides complete control over the temperature of the environment in contact with the leather independently of the external environment. This protects leather and hides against thermal shocks, providing accurate control of the temperature and humidity levels and the possibility to achieve reproducible results independently of the season. This results in increased uniformity among the hides processed during the year or at plants located on different continents.​
The Cold Milling® version of the entire
Black Line drum range can be selected.

Cold Milling® logo

Cold milling

Cold Milling® Black Line

Designed for cold milling, it allows the process to continue independently of the outdoor environmental conditions without affecting the level of leather moisture.

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Assomac Targa Verde

Assomac - Green Label

The Green Label is part of the ASSOMAC “Supplier of Sustainable Technologies” project, which aims to create a membership-based Labelling System certified by a third-party organisation given that traceability, sustainability, transparency and environmental compatibility are now fundamental prerogatives, which cannot be ignored.

In the absence of internationally recognised standards for the classification of the energy and/or environmental performance of leather processing machines, Erretre, together with many Italian manufacturers, is promoting a tool with Assomac that aims to provide some performance data of the manufactured machinery.

The green label is a document that aims to identify and ensure ease of comprehension of the energy and environmental performance data of tanning industry machinery. In particular, it refers to a process chosen by the manufacturer as a comparison parameter.


The applied procedure makes it possible to express the impact of the system in the production process by means of the internationally recognised reference parameter CFP (carbon footprint), calculated according to LCA (Life Cycle Assessment) methodologies.


Awareness of the technological excellence achieved, also in terms of sustainability, is in fact one of Erretre's core strengths, at the forefront with low environmental impact and high sustainability technological solutions.

Discover our products
Black Line

Our state-of-the-art line

Low energy consumptions and high performance, the ultimate in technological innovation and quality

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Spray booth

No compromise, Ecotan is the perfect booth for all types of spray guns and applications.

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NER tunnel

Drying tunnel

Drying tunnel that guarantees thermal shock-free leather and hide drying.

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