How to Make Black Powder Safely ThoughtCo
02/11/2019#0183;#32;Place your ball mill someplace away from traffic, like a garage or shed. It''s highly unlikely accidental ignition will occur, but you should take necessary safety precautions. Don''t grind the powder in a room with people, an open flame, or flammable chemicals. Do not smoke around black powder. Allow at least a couple of hours for the ball mill to do its job. Lay out a sheet of paper, open the