Originally Posted by arcticap

Sulphur is added to BP to lower the ignition temperature.
Believe it or not there's a powder that uses only two of the ingredients of black powder which omits the sulphur and it works almost the exact same.
It's only ingredients are ~85% saltpeter and ~15% charcoal by volume.


http://thefiringline.com/forums/showthread.php?t=450111