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), smokeless powder, detonator explosives, and many more. They are used in bullet hits (squibs), blank cartridges, flash pots, fuses, mortars, smoke pots, sparkle pots, etc. The main problems of include prematurely triggering the pyrotechnic effect, use of larger quantities or more dan ....