Quincy Resources Group

ECT vs. Mullen

Burst Strength/Mullen

This strength measurement relates indirectly to a box’s ability to withstand external and/or internal forces. It is based upon testing that measures the force needed to rupture combined board. The force is simulated by vacuum or hydraulic pressure. A Mullen tester then measures the strength of the material in pounds per inch.

Edge Crush Test (ECT)

The primary purpose of this measurement is to predict compression strength of a completed box. The test measures the amount of force required to compress an on-edge corrugated sheet (One square inch). The force is then measured in pounds per square inch.
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