给出了用于描述组合云母材料、基于它们的产品和云母纸的术语的定义。它还涉及一般要求和供应条件。 新版的变化包括: -新的第2条:规范性参考文件； -根据第4条:材料说明 -新的子条款4.2.1涵盖了浸渍有B级树脂的柔性云母材料， -新的第4.2.2款覆盖柔性云母材料，多孔，用于后浸渍； -新订的第5条涵盖一般要求和供应条件。

Gives definitions of terms used to describe built-up mica materials, products based on them and mica paper. It also deals with general requirements and conditions of supply. Changes in this new edition include: - a new Clause 2: Normative references; - under Clause 4: Description of material - new Subclause 4.2.1 to cover flexible mica material impregnated with B stage resin, - new Subclause 4.2.2 to cover flexible mica material, porous for post-impregnation; - a new Clause 5 covering general requirements and conditions of supply.