本国际标准规定了测定和定量表示折叠耐久性的方法 摄影胶卷。该方法基于附录B中所述的MIT折叠耐久性测试仪。它是一种 分析测试，不用于模拟实际使用条件。 本国际标准适用于带或不带明胶背衬的胶片。它也可以应用于任何一种情况 未加工或加工过的胶片，尽管在加工后给定胶片的柔韧性水平可能会有很大的不同。 可使用与本国际标准中所述设备类似的设备，前提是已确定相关性 在使用该设备获得的结果和使用该设备获得的结果之间建立 描述。

This International Standard specifies a method for determining and quantitatively expressing the folding endurance of photographic film. The method is based on the MIT folding-endurance tester described in annex B. It is an analytical test and is not intended to simulate practical use conditions. This International Standard is applicable to film with or without a gelatin backing. It may also be applied to either raw or processed film, although the flexibility level of a given film can be quite different after processing. Equipment similar to that described in this International Standard may be used provided that a correlation has been established between the results obtained using such equipment and the results obtained using the equipment described.