规定了测定灰分的方法，未增塑醋酸纤维素，不含添加剂、填料、染料或其他可能影响结果的材料-点火试验部分，并在马弗炉中煅烧，温度保持在575摄氏度或850摄氏度（按约定）。更高的温度（比如850摄氏度）会将碳酸盐转化为氧化物，从而给出更低的值。应遵循ISO 3451/1中的一般说明。

Specifies a method for the determination of the ash unplasticized cellulose acetate, free of additives, fillers, dyes or other materials, which may affect the result. -Ignition of a test portion and calcination in a muffle furnace maintained at 575 C or 850 C (as agreed). Higher temperatures such as 850 C will convert carbonates to the oxides and thus give lower values. The general instructions in ISO 3451/1 shall be followed.