I hope this isn't too off-topic here, mods+admins feel free to remove it if it is.
I was thinking about making my own chemical photographic flashes..
I've read about "flash" powder, but as well as being dangerous, it also produces a very loud sound when confined, and I'm not interested in bangs!
So how else could I do it? I thought about magnesium, but magnesium strips burn too slowly.. Would it burn faster in pure oxygen? What about aluminum, or iron? Would aluminum foil burn in a high-oxygen environment? Say, if I put some aluminum foil or steel wool in a container of (possibly slightly compressed) oxygen, would they burn fast enough to make a flash?