TAPPI T 843 – Fluted edge crush of corrugating medium (rigid support method)
Edge Crush Test (ECT)
ECT–Edge Crush Test measures the edgewise compression strength,parallel to the flutes
This test evaluates the ability of corrugating medium to contribute to the compression strength of a corrugated box. It is a procedure for measuring the edgewise compression strength of a laboratory-fluted strip of corrugating medium in a direction parallel to the fluted tips.
Fluted edge crush is also measured in TAPPI T 824 “Fluted edge crush of corrugating medium (flexible beam method)”, which uses a flexible beam compression machine instead of a rigid platen machine as used in this procedure.