Black powder

[jon_norstog]

I would think that the KNO3 would tend to dissolve if the stuff got really wet and wasn't enclosed, as it would be in a shell or an intact keg. That's kind of how they used to get the nitrate - it would go into solution in a damp pile of manure, the solution would wick to the surface and the water would evaporate, leaving the white nitrate salts to be harvested.

jn

[musketshooter]

It is my understanding that the Boston bombs were made with fireworks powder. There goes the 4th of July celebrations!