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special effects are widely used in motion picture production to create all types of effects involving explosions, fires, light, smoke and sound concussions. The types of materials used include flash powder, flash paper, gun cotton, black powder (gunpowder), smo ....

Middle of Essay
.... Class B explosives. They will burn, but not explode unless confined. Examples are black powder and pellet powder, safety fuses, igniters, igniter cord, fuse lighters, Class B special fireworks, and Class B composite solids propellants. Class C explosives are common fireworks. Note that short lengths of Primacord may be classified as Class C under certain conditions. Both Class B and C explosives are also called low explosives. All pyrotechnic materials and other explosives consist of an oxidizer (source of oxygen) and a reducer (fuel). Examples of oxidizers include potassium nitrate, strontium nitrate, potassium perchlorate and potassium chlor ....