IEC 60641的本部分包含了与电气用纸板和纸张的分类相关的定义，以及其应满足的一般要求。与前一版本相比，主要变化是:标准中不再规定表面光洁度的种类，固定标称厚度已被首选厚度取代，B.6和P.6型已被替换，但名称已保留，B.7和P.7型已被删除。

This part of IEC 60641 contains definitions related to a classification of, and the general requirements to be fulfilled by, pressboard and presspaper for electrical purposes. The main changes with respect to the previous edition are: the kind of surface finish shall no longer be specified in the standard, fixed nominal thicknesses have been replaced by preferred thicknesses, types B.6 and P.6 have been replaced, but the designations have been kept and types B.7 and P.7 have been deleted.