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TAPPI T 423 Fold, Schopper

Standard:

TAPPI

Method:

TAPPI T 423

Title:

Folding endurance of paper (Schopper type tester)

Scope

TAPPI T 423 Fold, Schopper 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).”

Significance

Folding endurance tests have been used for the estimation of the suitability of paper in use to withstand repeated bending, folding, and creasing.

 

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