Standard testing conditions: Officially specified conditions under which paper is tested: 50%relative humidity and 23 degree Celsius.

标准测试环境：正式指定的测试纸张环境；相对湿度50%，温度摄氏23度。

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Water vapour transmission rate (WVTR) : Mass of water vapour transmitted through a unit area in a unit time under specified conditions of temperature and humidity.

译文：水蒸气透过率(WVTR)：在一定的温度、湿度条件下，单位时间内透过单位面积的水蒸气的质量。

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Relative humidity greater than 50% will increase required cure specified.

相对湿度大于50%将增加所需要的固化时间。

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