Fingerprint analysis will give grip on the quality of your rubber products




Rubber products are used in a broad range of applications with an often critical function like sealing, transporting, damping and/or isolating. Often the appropriate functioning of an apparatus, machine or complete installation is dependent on the suitable rubber product in the correct compound composition.


Unfortunately our independent laboratory is often consulted about failure, complaints and damage caused by rubber products. The cause of failure is often underestimation of the critical function of these rubber products. Miscommunication about the desired properties, non-sufficient material specifications, changes in material composition, non-optimal production processes can often lead to failures.


With our extensive know-how, well-equipped laboratory and decades of experience we are the right partner for these failure analyses. If a rubber product has failed, for example due to cracking, swelling, shrinkage or hardening, the cause can often be discovered. A recommendation can also be made to avoid the problem in the future.



The appearance of a rubber product does not show if the quality is as it should be. For various reasons suppliers and manufacturers of rubber products may sometimes make changes in their compound formulation and/or process which may be the cause of future problems in application. A change in compound formulation can lead to different material properties, whereas a change in process may lead to a non-optimal degree of cure.

Failure analysis can often be prevented by regularly using a quality benchmark: “fingerprint”. In doing so a combination of properties of the product is determined to give a good impression of both the material composition and degree of vulcanisation. Having these properties periodically determined can point out any non-compliances and prevent future problems. Hence, these fingerprints give you more influence on the quality of your product.


The main objective of a fingerprint is:

- Creating reference data

- Noticing possible changes in time in material composition or degree of cure

- Finding out the cause in case of failure


The fingerprint consists of the following tests:

  • Density according to ISO 2781
  • Hardness according to ISO 48-4 (Shore A) or ISO 48-2 (IRHD)
  • Determination of the compression set according to ISO 815-1, method A
  • Determination of the extractable matter by means of Soxhlet extraction according to ISO 1407
  • Determination of the content of polymer, carbon black and mineral filler (ash) by means of ThermoGravimetric Analysis (TGA) according to ISO 9924-3
  • FTIR-ATR analysis according to ISO 4650. A peak spectrum shows which chemical groups are present in a rubber product. Changes in material composition are almost always becoming clear.


This combination of six tests gives insight in the consistency in material composition (density, extraction, TGA and FTIR analysis) and degree of cure (hardness and compression set). The latter is an indication whether the rubber product has been vulcanized properly.


This fingerprint can of course be extended with the determination of all kind of other and possibly customer specific physical-mechanical-dynamical properties.

We would like to perform your rubber fingerprint analysis

We are glad to make you a suitable offer in case of multiple rubber products or periodical fingerprint analysis. For more specific information, please contact us by phone or via e-mail



Do you have a question? Feel free to contact us!

E: info@ertbv.comT: 0570 62 46 16