Phone: +49 3672 379 - 0

Ostthüringische Materialprüfgesellschaft für Textil und Kunststoffe mbH

Viscosity measurements

The flow behaviour of plastics is determined through their viscosity. A differentiation is made between the melt viscosities (MVR / MFR) and the solution viscosities, often expressed in viscosity numbers (VZ, IV or VN). Both measurements depend on the chain lengths of the polymers and on the test conditions.

Therefore, the factory test certificates should always be enclosed for comparative tests. The procedures are also used for determination of the polymer degradation during the processing.

OMPG has spiral tools with different wall thicknesses for examining the influence of different additives on the flow path in injection moulding.

Plastic Testing

Dipl.-Ing. Ute Schwarz
Phone: + 49 3672 379 - 420
Fax: + 49 3672 379 - 379


OMPG is an accredited testing laboratory according to DIN EN ISO / IEC 17025.

Accreditation certificate (PDF)
Annex to accreditation certificate (PDF)

OMPG certificates are currently updated by DAkkS. 
Our laboratory passed the current audit in 2020. 
Please use our German accreditation certificates meanwhile.
English certificates are on their way. 


Ostthüringische Materialprüfgesellschaft für Textil- und Kunststoffe mbH

Breitscheidstraße 97
07407 Rudolstadt

Phone: + 49 3672 379 - 0
Fax: + 49 3672 379 - 379