Testing of the ECOHEMP hemp fabric jacket

In the ECOHEMP development process, it was out of the question for Cordial that they had to verify that the novel fabric jacket made of natural fiber hemp can endure all the stresses and strains that cable jackets are typically confronted with in a musician´s everyday routine.

Accordingly, the set goal was to simulate an aging of the product of more than 2 years under laboratory conditions, simulating the classic use in the rehearsal room as well as the tough everyday life on stage.

An important issue for CORDIAL was the artificial aging of the material,  for example, under pressure and strain, i.e. when the cable is stepped on constantly or even a hard case rolling over it.

Temperatures also play an important part, i.e. on the one hand, thermal and electrodynamic stress and, on the other, a wide variety of ambient temperatures.

Another important aspect: how do the cables react when they are exposed to UV radiation?

Great attention was paid to the behavior of the material with regard to wear and abrasion, i.e. how well does the protective cover made of hemp endure when a cable is not just used on a stage or in the studio but, for example, by buskers and dragged over rough cobblestones?

Another important aspect for us was  the material’s dirt and  solvent resistance capacity when confronted with different liquids: does the cable gather an enormous amount of dirt? What about classical mishaps like cola or beer showers or a long exposure to large amounts of sticky fog fluid? Does the cable still look good then?

All of these issues were tested and the results are impressive...

*In the picture, by the way, the white sample is the hemp textile coat - the matching brown/green color was added at a later date.


We commissioned the renowned independent textile research center DTNW Öffentliche Prüfstelle GmbH in Krefeld, Germany, to test the ECOHEMP hemp fabric jacket (as well as other textile jacket materials) under various typical scenarios.

Various checks were carried out in the test laboratory resulting in an excellent assessment in every particular and the granting of the required test certificate for the ECOHEMP jacket material.

The commissioned test center checked the following aspects within the framework of comprehensive, application-oriented testing phases:

Exposure to light:

To deal with this aspect a so-called xenotest was performed. For this purpose, cable sections were clamped in a test device and exposed to light for up to 240 hours. The special lamp incorporated into the device generates an artificial light that mimics sunlight.  In principle, prolonged exposure to sunlight can lead to color changes in materials. Even after 240 hours of simulation, though, this was not detected in the sample material. The laboratory therefore affirmed a sound lightfastness of our product.


After taping the cut edges of the samples (to prevent scuffing at the edges), the lab performed tests in a so-called "pilling box". On the one hand, a test in a "normal" box with cork walls was performed, and, on the other hand, the walls were covered with sandpaper and another abrasive body wrapped with sandpaper was placed next to the samples. By rotating the box in preset cycles, scouring contacts were then generated among each other, as well as with the walls, thus simulating material stress.


In this test the experts also used material samples with taped ends. The test laboratory pretreated the individual material sections with diverse test liquids, which can typically also occur in "daily cable routines", e.g. beer, cola and fog fluid.

On the one hand, the liquid was dried on the sample, and on the other hand, the test was started with freshly applied liquid right away. The samples were then placed in test vessels containing small amounts of the respective reference dirt. These vessels were then put in a shaker box. By rotating the box around its own axis the cables in the vessels move and come into contact with the reference dirt.


For this test scenario, the laboratory immersed the cable sections wound onto a specimen holder (and fixed with thread) in a vessel filled with water, which was then sealed. After storing it in an oven at 110 °C for 7 days, the vessel was reopened. The following examination revealed that the colors had deteriorated slightly (except for the EDITION 25 jacket, which was also tested). However, according to the test center, this is not unusual. Normally, this procedure is mainly used for other products (e.g. backpacks), but not for cables. Slight color losses may therefore occur. After all, no cable is submerged in water and placed in a hot oven for 7 days "in real life".

All in all, DTNW Öffentliche Prüfstelle GmbH was very satisfied with the results regarding our new product.

The positive results in all performed tests led to the assignation of the targeted test certificate for the new ECOHEMP hemp fabric jacket. The certificate proves that it will withstand the typical stresses and strains of daily routines of cable use very well, even over long periods of operating life.

*In the picture, by the way, the white sample is the hemp textile coat - the matching brown/green color was added at a later date.

More information

ECOHEMP: Natural, renewable, 100% recyclable
The textile jacket made of 100% certified hemp
The complete (100%!) fabric material of ECOHEMP cables consists of a braid of special hemp fibers. This natural raw ...
International Design Award for ECOHEMP
Red Dot Award 2023
On June 19, ECOHEMP was awarded the Red Dot Award.
Award ceremony for ECOHEMP
German Innovation Award Gold 2023
On May 23, the ECOHEMP instrument cable was awarded with the German Innovation Award 2023 in Gold at the Futurium ...
The textile jacket made of 100% certified hemp

The complete (100%!) fabric material of ECOHEMP cables consists of a braid of special hemp fibers. This natural raw material has been used for the production of fabrics for thousands of years and that is why we also rely on this sustainable alternative to the otherwise customary textile jacketing.

In doing so, we have observed the strictest standards: Our textile jacket has been granted the prestigious GOTS certificate (Global Organic Textile Standard) *(TRANSACTION CERTIFICATE NUMBER ICEA TC GOTS 2022 80775 3179). This means that environmental requirements as well as social standards are met along the entire production chain and that only organically produced natural fibers are used.

Some decisive factors for the optimal use of instrument cables in a musician's daily routine are, of course, a high degree of flexibility and good windability. To ensure that this requirement is also met as regards the fabric jacket, the machines used are operated in the so-called "low-speed process" mode during braiding, i.e. particularly slowly, so that an exceptionally elastic and resilient braid is produced.


Red Dot Award 2023

ECOHEMP was awarded the Red Dot Award 2023 on 19 June. The award ceremony took place at the Red Dot Design Museum in Essen during the Designers' Night. With approximately 20,000 entries each year the Red Dot Design Award is one of the largest design competitions in the world. The internationally highly respected seal signifies exceptional design quality.

More information

German Innovation Award Gold 2023

On 23 May 2023, the instrument cable ECOHEMP was awarded the German Innovation Award 2023 in Gold at the Futurium in Berlin. In the "Excellence in Business to Consumer - Entertainment Electronics" category, the jury of experts decided on the PVC-free instrument cable in a fabric sheath made of hemp. For Cordial, this is a great motivation for further steps towards the most sustainable products in the ECOCORD line, to come. 

More information can be found here


Sustainable sound transmission
Innovative ECOCORD Bulk Cables
With our ECOCORD line, we rely on a completely new jacket material that dispenses completely with PVC! Sustainable and, ...
"Promotes good forest utilization"
Sustainable packaging
Our approach towards the sustainability of our ECOCORD / ECOHEMP products in as many areas as possible, logically ...
Innovative ECOCORD Bulk Cables

Cables generally available on the market have always had a similar basic principle: A conductor made of copper, enclosed in a jacket made of PVC. But what is often not taken into account: Due to some additives, a problem-free recycling of PVC is not possible! 

With our ECOCORD line, we rely on a completely new jacket material that dispenses completely with PVC! Sustainable and, most notably, at least of the same high quality as anything that has been used before.

Our alternative to PVC is called TPE-V. The so-called TPEs (thermoplastic elastomers) combine a rubber-like and a thermoplastic component. The rubber-like properties provide, for example, elasticity, softness and flexibility, the thermoplastic materials stand for recyclability, hardness and high service temperatures. TPEs are not chemical but purely physical cross-links, which can be reversed in a recycling process by high heating. The waste materials, which are thus separated from one another again, can then be reprocessed individually. This represents a major advantage over PVC in the recycling process, because PVC waste is, on the one hand, not (or only in a very difficult process) degradable and, on the other, harmful chemicals are released into the environment in the respective disposal processes.

In addition to that...

  • ...The material is recyclable. 
  • ...Energy consumption during production is significantly lower than for conventional PVC materials. 
  • ...TPE-V is 25% lighter than PVC.
  • ...All of the production takes place in Europe to keep supply chains short.
  • ...For every cable sold, a tree will be planted by the non-profit organization Trees for the Future
  • ...The textile jacket of the Eco Hemp series is GOTS certified. 
  • ...Even the packaging is made of recycled gray cardboard (FSC® mix).

But, of course, when it comes to sound, our ECOCORD cables also provide everything that musicians and sound engineers expect from a high-quality Cordial product. Similar to the EDITION-25 and BLACKLIGHT-EDITION series, a double shielding of copper wire braiding and conductive plastic (minimizes microphony effects) and a conductor cross-section of 0.50 mm² (conductor resistance < 39 Ω/km) ensure a particularly clear signal transmission.

Sustainable packaging

What good is a sustainable product that lacks a sustainable packaging? So, consequently, our approach towards the sustainability of our ECOCORD / ECOHEMP products in as many areas as possible, logically also included the product tag properties. That's why we use recycled gray cardboard, which has a particularly good environmental balance and is FSC® Mix certified.

According to FSC® Germany, the FSC® Mix stipulates the use of materials from FSC-certified forests and/or recycled material as well as material from controlled sources in production. At least 70% of the used material must be FSC®-certified or post-consumer recycled or at least an equivalent amount must be used in the production process of the labeled goods. This is confirmed by the FSC® Mix seal on the ECOCORD / ECOHEMP tags.

The tag design
The design of the tags, which are used for all products in the ECOCORD series, features a matching uncoated paper / gray cardboard (2-color) and stands out well from other Cordial product tags.

On the back of the tag explanations regarding the product are summed up in a visually appealing way - so that you already know what it's all about when you buy the product.

For further product tag information click here