IEC 60371-3-2:2006 gives requirements for electrical insulating materials made from mica paper which is to be processed for built-up mica materials according to IEC 60371-1, such as rigid flat mica materials, flexible mica materials, curable flexible mica materials and shaped pieces. This second edition cancels and replaces the first edition, published in 1991, and constitutes a technical revision. The main changes with regard to the previous edition include adjustments to align this standard with changes included in the latest edition of IEC 60371-2. Keywords: electrical insulating materials, mica paper