Sparklers

A sparkler is a type of hand-held Novelty Fireworks that burns slowly while emitting coloured flames, sparks, and many effects.

The "classic" type of sparkler consists of a thin metal rod approximately 20 cm (8 inches) long that has been dipped in a thick batter of pyrotechnic composition and allowed to dry. This composition is rich in a metallic fuel such as aluminium or iron, which when burned creates silver or gold coloured sparks, respectively. The fuel typically contains potassium nitrate or sometimes potassium chlorate as an oxidizer, sometimes with sulfur and carbon. Coloured flame can be achieved by addition of nitrates or chlorides of barium (light green), copper (blue/green), or strontium (red).