What is the white powder in firecrackers?
So inside, I found some grey-ish powder (suspect it is Gunpowder) and a lot more white powder. The Firecrackers do not give of a huge flash, so I am asking.
What is the white powder, what does it do, and should I keep it?
(Please no answers like "You shouldn't play around with that" and other negative responses. I am looking from a makers point of view.)