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The corrugating medium test (CMT) explained

CMT tests are performed to EN ISO 7263 or TAPPI T 809. The corrugating medium test provides information about the behavior of the corrugating medium following forming in the fluter.

One side of the formed medium is adhered to a backing strip and subjected to compressive loading. The maximum load characterizes the behavior of multi-wall corrugated board during subsequent processing operations (punching, printing). It is important that force application to the specimen is exactly perpendicular during these tests.

One disadvantage of this method is that only the A-flute is tested. The behavior of other types of fluting must therefore be determined mathematically in order to obtain their crush resistance.

Corrugating medium test (CMT) with Zwick

  • Precision-guided compression platens ensure extremely high lateral stiffness, guaranteeing reproducible test values.
  • The compression platens are suitable for the ring crush test (RCT), the flat crush test (FCT), the edge crush test (ECT) and the corrugating medium test (CMT).
  • Specimen production is time-consuming and requires a great deal of skill. Zwick fluters are therefore supplied complete with a 'third hand', enabling specimens to be prepared quickly and easily.


Zwick Roell ČR, SR
Tel.  +420 511 187 005
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