There are two types of explosives: low explosives and high explosives. This classification depends on their rate of explosion. Low explosives "conflagrate" (= burn very fast). High explosives "detonate" (= explode with bursts). A low explosive is a material, which burns very fast, but does not explode generally. For exploding them, people mix them with high explosives. Sometimes, even a low explosive may detonate. A high explosive bursts and explodes very fast. High explosives produce more pressure than low explosives but low explosives are more safe to use. People use low explosives in fuses, rocket engines and fireworks, and high explosives in mining and demolition (destroying old bridges and buildings). Military weapons use high explosives. 