Holistic testing approach

DIN SPEC 19296 focuses on textile products and the fragments released through use, abrasion or disposal. Tests are conducted in standardised soil under defined climatic conditions over a period of up to 180 days.

The method combines several parameters: a respirometer system measures the oxygen consumption of microorganisms during degradation, enabling the biodegradability of textile fragments to be quantified. Plant growth tests using cress seeds assess potential effects on vegetation after degradation. In addition, earthworms are used as sensitive bioindicators to evaluate possible toxic effects. Survival rates and changes in body mass indicate whether degraded fragments or residues have a negative impact on soil organisms.

This integrated approach not only determines whether materials are biodegradable, but also whether their fragments could harm plants or soil organisms. 

Practical relevance and added value

“Textile fibres and fragments are released into the environment not only during washing, but also during everyday wear,” says Juliane Alberts, Project Manager at Hohenstein. “DIN SPEC 19296 allows us, for the first time, to assess under realistic conditions how different textile fragments behave in soil. It makes an invisible issue visible and supports the development of more sustainable textile products.”

The new DIN SPEC enables companies to compare textile products in terms of their potential environmental impact resulting from fibre release. It also provides a scientific basis for evaluating environmental claims such as “compostable”.

Jointly developed – publicly available

DIN SPEC 19296 was developed by Hohenstein in cooperation with industry partners and is publicly available. The results can help to better assess the actual environmental impacts of textile fiber loss, derive appropriate mitigation measures, and develop materials with lower environmentally harmful fiber shedding for the textile industry.