本方法描述了使用MIT型仪器测定纸张耐折性的方法。排气扇装置将折叠头保持在室温下。MIT测试仪适用于任何厚度的纸张；但是，如果纸的外层纤维层厚度超过0.25毫米（0.01英寸）在最初的几次折叠中破裂，测试失去了意义。Schopper型装置的程序见TAPPI T 423“纸张的耐折性（Schopper型测试仪）”

This method describes the use of the MIT-type apparatus for the determination of the folding endurance of paper. An exhaust fan arrangement maintains the folding head at room temperature.The MIT tester is suitable for papers of any thickness; however, if the outer fibrous layers of paper thicker than about 0.25 mm (0.01 in.) rupture during the first few folds, the test loses its significance.The procedure for the Schopper-type apparatus is given in TAPPI T 423 "Folding Endurance of Paper (Schopper-Type Tester)."