The application of porcelain to strain insulators

Porcelain possesses some qualities which make it a very good material for line insulators and especially strain insulators. It can be moulded and worked into almost any desired form or size; when made of proper materials and properly burned it has practically no depreciation when exposed to the weather, acid fumes or gases, which sometimes create so much havoc on electric lines. It is hard and dense and has high dielectric strength. It is practically non-absorbent and so is not affected by frost.