I read somewhere that if u mix equal parts of zinc powder and sulfer it makes a real good flash powder. Can anyone tell me if this is true. I don't wanna buy the shit and have it suck.

try askin in the backyard balistics forum. they would know better. or maybe even the better livil through chemistry forum....though asking here IS a bad idea

should. any oxidiser and fuel will for the most part. just remember, if a pairing goes up and across the periodic table from alkalias to non metals it make a decent flash powder.