Fireworks

It is called fireworks devices that are ready for pyrotechnic reactions occurring inside. The reactions occur by combustion pyrotechnic explosive materials, which can generate flames, sparks and smoke. Pyrotechnic devices may also contain elements for controlled explosive reaction occurs. Pyrotechnic reactions can be initiated by electrical elements, and then turn pyrotechnic devices to program the occurrence of other pyrotechnic reactions. Pyrotechnic devices with visual effects, sound and smoke are known as fireworks and are used in exhibitions, festivals, celebrations.