This part of IEC 61628 contains the definitions, designations and general requirements of corrugated pressboard and presspaper for electrical purposes. Materials which conform to this International Standard meet established levels of performance. However, the selection of a material for a specific application should be based on the actual requirements necessary for adequate performance in that application and not based on this specification alone. While the primary use of these materials is as electrical insulation, there is no intent to discourage their use in other applications for which their properties may make them suitable.