Catalogues and registration

Catalogue Proficiency Testing

Catalogue Reference Materials


Welcome to the website of the German Institute for Interlaboratory Comparisons (Deutsches Institut für Ringversuche), the department for proficiency testing and reference materials of the Kunststoff-Institut Lüdenscheid. Over the past 30 years, the Kunststoff-Institut Lüdenscheid has earned an international reputation as one of the leading institutions in the field of plastics and currently has about 100 employees. With more than 15 years of experience in the field of proficiency testing, we are one of the pioneers in the field of interlaboratory comparisons for plastics.

  • Expertise, competence and experience – everything under one roof!
  • Accredited provider of proficiency tests (DIN ISO/IEC 17043)
  • Quality assurance in our own accredited test laboratory (DIN EN ISO/IEC 17025)
  • Precise, ultra-modern sample production in our own technical centre
  • Direct access to the plastics expertise of all departments of our institute

Our proficiency testing program and our reference materials cover a wide range of tests and analyses. The focus is on different plastic materials, plastic products and plastics processing. A wide range of proficiency testing, from the “classics” of mechanical and thermal testing methods to “exotic” methods such as generative processes or the investigation of the compostability of plastics, are part of our portfolio. You can view our complete offer in our catalogue, which is also an interactive registration form. After registration you will first receive a non-binding offer with comprehensive price information. As a clear distinctive feature of our international activities in the field of interlaboratory comparisons, the Kunststoff-Institut Lüdenscheid offers proficiency tests under the brand name “Deutsches Institut für Ringversuche”.


Kunststoff-Institut Lüdenscheid (Interlaboratory Testing)


Further information on our institute and general explanations on the interlaboratory comparisons and reference materials can be found under the header item Services & Institute If you have any questions or suggestions regarding our proficiency tests, please do not hesitate to contact us.

Do you need support in the selection, development, optimisation and implementation of products, tools and processes in the field of plastics engineering? A case of damage has occurred that needs to be analysed? A service in the field of material characterisation would help you? You will find the business units Testing, Research and Development on the main page of the Kunststoff-Institut Lüdenscheid.


17 01/24

Registration phase for proficiency tests 2024

A large number of interlaboratory comparisons will also be available in 2022. Our online catalogue can easily be used to browse the programme and register. To check the testing competence of your laboratory we offer: – many accredited PTs according...
21 07/22

Proficiency testing series – Autumn 2022

  This year’s fall series will start soon. There will be some new procedures. For the following proficiency tests, participation is still possible. The implementation of these procedures is assured, as a sufficient number of laboratories have already registered here....
07 02/22

Reference materials

For many test methods from our interlaboratory comparisons we offer the possibility to purchase reference sample sets. Thereby, you receive the precision data obtained from previous interlaboratory comparisons. This bundle enables you to check the accuracy of your methods during...