How Do Fireworks Work?
Have you ever wondered how fireworks are made? Despite all their different colours, shapes, and sounds, all fireworks have the same basic components.
So what causes the firework to launch into the air?
When someone lights a firework, a tiny spark burns along a paper-like fabric string, also called a fuse. This fuse was tested carefully and measured by professionals in order to reach the shell at just the right height in the air. As the spark travels up the fuse, it reaches the charge first, which launches the firework into the air. It continues to burn as it rises into the sky until the spark next reaches the shell.
You know what comes after that! The large amount of powder in the shell burns up quickly, creating a pop or cracking sound emitting colourful stars that give you the firework effect.
- Peter Hemmings