What is the difference between ECT and ECV?

Charles asks,

What is the difference between ECT and ECV?

ECT (Edge Crush Test) is the testing method. ECV (Edge Crush Value) is the actual outcome or reported result of the Edge Crush Test. ECT is a measured in pounds per lineal inch of load bearing edge. Though it may sometimes be reported as ECV or lb/in it is typically reported or listed as an ECT value such as 23 ECT.

ETC has widely replaced the use of the Mullen test as ECT is considered by most as a more accurate test of the stacking strength of a corrugated box. It measures the edgewise compressive strength of a corrugated sample on an axis parallel to the sheet. Mullen, on the other hand, measures the bursting strength of the face of the corrugated sample, or on an axis perpendicular to the sheet.

– Ralph

 

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