This has been sort of a recurring theme for me the past few years for the installment nearest Independence Day. You can hit my profile and find the earlier entries in this series.
This time, I intend to focus on the single greatest improvement in technology (other than the development of black powder) that has made modern, highly colored fireworks possible. Until relatively recently the only colors available were white, yellow, and a dull red, with very faded out, compared to today, other colors.
First some theory, then some facts. Please follow.
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