English base bulk

[Luke Sky]

Bulk Conductivity = Conducibilità di Volume
Concerning insulation materials neglecting the surface conductivity wich depend on the surface treatment.
Bulk conductivity, in this hypothesis, express the conductivity of an insulator in unit form: [siemens/meter].

 

[MünchnerFax]

Hi. I think it's a very technical term, but I'll leave it to the English team for consideration.