Flame projector
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In pyrotechnics, a flame projector is a special effects device that projects a column of flame upwards, for a short, determined and controllable, period, usually on the order of a few seconds.[1][2] The simplest form of flame projector is simply a vertical tube mounted on a base, containing powder and a hole for an electric match.[1]
Flame projectors can produce flames of different colours by simply adding a colouring agent. Potassium compounds make purple compounds, for instance. Lithium and strontium are red, sodium is bright yellow, copper and boron compounds are blue or green. [1]