IEC 60667-3-1 Revised
IEC 60667-3-1:1986
Specification for vulcanized fibre for electrical purposes - Part 3-1: Specifications for individual materials - Flat sheets
Specifies requirements for flat vulcanized fibre sheets. Not applicable to material made by combining with an adhesive several thicknesses of vulcanized fibre sheet.
CHFÂ 20.-
A more recent version of this publication exists:
IEC 60667-3-1:2020