Covers vulcanized fibre sheets, flat or corrugated, round rods and round tubes intended for electrical insulation. Three basic types of vulcanized fibre are defined: Type A with high density and greater hardness and stiffness, Type B for general purpose
IEC 60667-1:1980 history
2020IEC 60667-1:2020 Vulcanized fibre for electrical purposes - Part 1: Definitions and general requirements
1980IEC 60667-1:1980 Specification for vulcanized fibre for electrical purposes. Part 1 : Definitions and general requirement