1.1 这些试验方法包括未经处理的云母纸的取样和试验程序，云母纸用作电绝缘体或用作电绝缘用复合材料的成分。 1.2 程序 2. 按以下顺序显示: ASTM 方法 程序 小节 工具书类 表观密度 12 . 水提取物电导率 32和 33 D202 条件作用 4. D685 介电强度 16 – 19 D149 浸渍时间 20 – 24 D202 水分含量 26 – 28 D644 轧辊质量 25 . 采样 3. . 抗拉强度 13 – 15 D828 厚 6 – 10 D374/D374M 重量 11 D646 重量变异性 29 – 31 . 1.3 以英寸磅为单位的数值应视为标准。 1.4 本标准并不旨在解决与其使用相关的所有安全问题（如有）。本标准的使用者有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 1.5 本国际标准是根据世界贸易组织技术性贸易壁垒委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的。 ====意义和用途====== 7.1 准确确定厚度对于识别非常重要。厚度与重量有关，必须已知厚度才能计算表观密度和介电强度。 7.2 厚度变化影响卷取的质量，有助于判断云母纸的均匀性，特别是在介电击穿电压、浸渍时间和最终产品厚度方面。

1.1 These test methods cover procedures for sampling and testing untreated mica paper to be used as an electrical insulator or as a constituent of a composite material used for electrical insulating purposes. 1.2 The procedures 2 appear in the following order: ASTM Method Procedures Sections References Apparent Density 12 . Aqueous Extract Conductivity 32 and 33 D202 Conditioning 4 D685 Dielectric Strength 16 – 19 D149 Impregnation Time 20 – 24 D202 Moisture Content 26 – 28 D644 Roll Quality 25 . Sampling 3 . Tensile Strength 13 – 15 D828 Thickness 6 – 10 D374/D374M Weight 11 D646 Weight Variability 29 – 31 . 1.3 The values stated in inch-pound units are to be regarded as the standard. 1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 7.1 Accurate determination of thickness is important for identification purposes. Thickness is related to weight and must be known in order to calculate apparent density and the dielectric strength. 7.2 Thickness variation affects the quality of roll winding and is useful in judging the uniformity of mica paper particularly with respect to dielectric breakdown voltage, impregnation time, and thickness of the end product.