Posted at 06:22h
in Sustainable Products
Most industries have a standard for measuring or describing the construction of a particular material. However, in the corrugated industry, there are two standards - the Mullen Test and the Edge Crush Test. This leads to quite a bit of confusion in the marketplace.
The Mullen Test, which has been used for many years, tests the bursting strength of corrugated board - how much pressure is required to rupture the wall of a piece of corrugated material. Boxes conforming to the Mullen Test standard are identified as 200# Test, 275# Test, etc. The higher the number, the stronger the corrugated box.
The Edge Crush Test, which was developed in the 1990's, measures the stacking strength of corrugated board - how much top to bottom pressure a box can withstand before crushing. Boxes conforming to the Edge Crush Test standard are identified as 32ECT, 44 ECT, etc. Again, the higher the number, the stronger the corrugated box.