Ball clay or China clay is the raw material for porcelain and ceramic industries. The material is also used in electrical industries specially in the manufacture of insulators for HT line, transformer bushings and switchgear insulators.   Our Percentage Composition (Tested ) : Silicon Oxide : 56.70 % Aluminium Oxide : 28.00 % Iron Oxide : 1.24% calcium oxide : 0.20% Magnesium oxide : 0.39 % Sodium Oxide : 0.34 % Potassium oxide : 1.40 % Titanium Oxide : 1.12 % Loss on ignition : 9.95