Approved by the Standard-Specific Interest Group for this method TAPPI Folding endurance of paper (Schopper type tester), Test Method T 423 cm-07

This method describes the use of the Schopper type of folding apparatus. It is suitable for papers having a thickness of 0.25 mm (0.010 in.) or less.

The procedure for the MIT type apparatus, which may be used for papers of any thickness, is described in TAPPI T 511 “Folding Endurance of Paper (MIT Tester).”