Ring Crush Test (RCT) Explained

 ISO 12192 or TAPPI T 822

The ring crush test (RCT) is used to determine the ring crush resistance of a paper strip formed into a ring with a standardized length and width. This test is performed according to ISO 12192 and TAPPI T 822. 

The ring crush test is similar to the short-span compression test in that the strength of the liner or fluting is measured both in the machine direction and perpendicular to it. It is important that force application to the specimen is exactly perpendicular during these tests. The results of this test are highly dependent on proper specimen preparation. Specimen and guides must be exactly parallel to ensure accurate determination of ring crush strength. As the ring crush test provides information about specimen buckling behavior rather than crush behavior, it is increasingly being replaced by the short-span compression test.

Ring crush test

Ring Crush Test (RCT) with ZwickRoell

  • Inserts for the ring crush test fit easily into the guided compression plates.
  • Optimum specimen parallelism is achieved with the ZwickRoell strip-cutter.
  • Precision-guided compression plates ensure extremely high lateral stiffness, guaranteeing reproducible test values.
  • The compression plates are suitable for the ring crush test (RCT), the flat crush test (FCT), the edge crush test (ECT), and the corrugating medium test (CMT).