My favorite part of the Fourth of July festivities is definitely the fireworks extravaganzas. Growing up, my family would go down to Wegman’s parking lot for the annual “Set the Night to Music” display in Williamsport, and to this day when I hear the song “Proud to Be An American,” I get excited thinking of the grand finale.

What I never thought about while I was “oohing” and “awing” was how they make such amazing, vibrant colors-at least not until the other day when someone sent me…