For a relatively low shrapnel explosion, I suggest pouring it into an empty
35mm film cannister. Poke a hole in the plastic lid for a fuse. These
goodies make an explosion audible a mile away easily.
Poke the hole before putting the flash powder into the cannister.
Don't get any powder on the lip of the cannister.
Only use a very small quantity and work your way up to the desired
result.
Do not pack the powder, it works best loose.
Do not grind or rub the mixture - it is friction sensitive.
