Black gun powder composition -
Carcoal 60% + Potassium nitrate 20% + sulphur 20% Charcoal 25% + Potassium nitrate 70% + sulphur 05% Charcoal 15% + Potassium nitrate 75% + sulphur 10% Charcoal 65% + Potassium nitrate 20% + sulphur 15%