Biodegradable in Soil - Indispensable Test Mark for Mulch Films

Especially with mulch films and other products that fulfil their function in the soil, biodegradation in the soil is crucial. It prevents the accumulation of pollutants, protects soil quality and supports the sustainable use of our resources.

With the DIN-Geprüft "biodegradable in soil" certification, manufacturers and users take responsibility - for healthy soil, functioning cycles and a future worth living.

Mulch films help to protect plants, improve the soil and increase yields in agriculture and horticulture. However, not all of them are equally suitable. For example, the remains of conventional mulch films have to be collected after use. More and more agricultural and horticultural businesses are therefore switching to biodegradable mulch films. Their unique advantage is that they can simply remain in the soil after use.

In addition, products used in horticulture and agriculture (e.g., drip tape, twine, clips, tree guards, and plant pots) and funeral products (e.g.,urns, coffins, and shrouds) that have a function in or near the soil can be certified according to ISO 23517.

DIN CERTCO provides the experts for the certification of sustainable materials within the TÜV Rheinland Group. We contribute more than 20 years of experience and expertise as well as a global network of testing laboratories and experts. With us, you have an experienced partner and independent third party at your side for the certification of your biodegradable products. This makes it easier for your customers in all global markets to decide in favour of your products made from biodegradable materials.

We create trust for your market success! Get in touch with us. We are here for you!

The certification scheme "DIN-Geprüft Biodegradable in Soil" is based on the following standards:

• DIN EN 17033 " Plastics - Biodegradable mulch films for use in agriculture and horticulture - Requirements and test methods”
• ISO 23517 " Plastics - Soil biodegradable materials for mulch films for use in agriculture and horticulture - Requirements and test methods regarding biodegradation, ecotoxicity and control of constituents".

The tests are carried out in a testing laboratory recognized by DIN CERTCO. First, we evaluate the material composition and determine the test procedure. If your product meets the above requirements, you will receive the corresponding certificate.

The following test certificates are required:

• Chemical characterization
• Test for complete biodegradability in soil
• Plant compatibility (ecotoxicity test)
• Earthworm toxicity tests (acute or chronic)
• Test for nitrification inhibition with soil microorganisms
• Infrared transmission spectrum

Especially for mulch films additionally:

• Dimensions, mechanical and optical properties
• Designation and marking of the product

The certification of products, such as mulch films, is valid for three years. The period of validity for materials, intermediates and additives is six years.

The surveillance of products and additives is carried out annually. The Surveillance of raw materials and intermediates is conducted every two years.