包含测定这些塑料物理性能的基本试验程序。还规定了用于比较与第3条中定义的材料类似的材料的主要方法。同样，经供应商和买方同意，当发现适用于评估不同厚度产品的性能时，允许使用相同的试验方法。

Contains the basic test procedures for the determination of the physical properties of these plastics. Also specifies the primary methods to be used for comparison of materials similar to materials as defined in clause 3. Likewise permits the use of the same test methods, when found to be suitable for the assessment of the properties of products of different thickness, when agreed upon by the supplier and the purchaser.