The Corrugating Medium Test

The corrugating medium test provides information about the behavior of a corrugated base-paper after it has been formed in a fluter. One side of the corrugated paper is glued to a backing film, then loaded in compression. The maximum load characterizes the behavior of multi-wall corrugated board during subsequent processing steps (punching, printing). 

One disadvantage of this method is that only the A-flute is tested. To determine the crush resistance of other types of fluting, the behavior in compression mode must be calculated mathematically. In addition, this method is time-consuming and specimen production requires a great deal of skill. Zwick fluters are therefore supplied complete with a ‘third hand’, enabling specimens to be prepared quickly and easily.

Crush tests are performed to ISO 7263 and TAPPI T 809