![]() Note that the charge simply sends the firework high into the air and clear of any spectators it doesn't make the spectacular explosions you can actually see. Traditionally, gunpowder used in fireworks was made of 75 percent potassium nitrate (also called saltpeter) mixed with 15 percent charcoal and 10 percent sulfur modern fireworks sometimes use other mixtures (such as sulfurless powder with extra potassium nitrate) or other chemicals instead.
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