Narrator: Fireworks have been around for millennia. They flood the sky with brilliant bursts of scarlet, emerald, and ivory. But never blue. Pyrotechnicians have tried to produce blue fireworks ...

But the invention of colored fireworks is relatively ... The right balance of copper and other chemicals in the flame or combustion reaction produce the best blue color flame in a firework.

A ‘perfect’ blue is very difficult to for fireworks designers (also called pyrotechnicians) to make. Blue comes from copper, but if the temperature gets too hot the colour vanishes ...

How have fireworks changed over that time? Conkling: The colors have definitely gotten brighter; new chemical mixtures have ... a reasonable blue. Now, if you start to combine the red and the ...