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Diagram of firework fuse

Fuse

During the Renaissance, when fireworks as we know them were invented, pyrotechnicians lit their creations with tissue paper rolled around a trail of black powder. Later, string embedded with gunpowder was used. Today, electrical wires connect fireworks to a master control board. With the push of a button, an electrical current rushes through the wire and creates a spark at the point of contact.

The main fuse simultaneously lights two secondary fuses—a fast-acting side fuse, that ignites the lift charge—and a time-delay fuse buried inside the shell that leads to the heart of the firework.

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