I can tell you from making black powder at the age of 15!!! that I was lucky enough to not have killed myself, brother and cousin and blow the house up!! Just for kicks I will tell you the story, it was December 1987, my cousin came from BC for X-Mas holidays a little early ,so whilewe were at school he went to the local library and brought back a book on Chinese rockertry, and for some god awfull reason the book contain the basic recipe of charcoal, sulfur and salt -peter. We convinced my mom to by a container of salt-peter from the drug store and told her it was for a science project. My father worked at a local papermill and we asked him for a can of sulfur for this same imaginary project, neither one knowing about the others help in locating these items(we were very bad kids when it came to mischief) So we went into the shed and got the third component Charcoal! We then proceeded to make wicks by soaking string in a mixture of salt-peter and vinigar( IT DID WORK) we dryed this out and it wrked out well. We then took thick cardbard we had from the papermill and made the outer casing, then ground and mixed by eye the percentage listed in the Chinese rocket book. The first test was underneath our parents carport, we stuck it in a pale of winter sand and lit the wick, Well it when off like a rocket scweeling but going no were causing a sulfur cloud about 25 yards round above and around the house. By the time our parents got back from shopping all you could smell was Sulfer! Not many questions were asked, so we started to build rocket #2 , a few days later after grinding,soaking wicks, making cardboard tubes we had it ready for a test fire, but it was -40 the night our parents went out. So instead of lighting it off outside the wood stove was elected as the scene of the 2nd attmpted rocket launch. I lit it and all of a sudden it started to spew gases into the basement, so I shut the door and we watched the woodstove shake, rattle and shimmy. But all was well the house didn't blow up and all of us had our fingers, 5 minutes later our parents showed up and we thought we were safe( stupid kids!) My father came running into the house with that look kids know so well when they are in trouble, he was so mad he didn't know what to do but have us show him how we did this, unknown too us when they came back home there was a 100 foot cumulis yellow sulfur clould above the house! Ater this episode when we asked each parent for something for a class project, they made sure too know EXACTLY what it was for!!! So as to making black powder it is just not worth losing parts of your body, your house or others lives, take it from someone who was on the fringe of killing innocent people and my brother, but I wouldn't have missed him as much as my cousin,HAHAHA, TAKE CARE AND DON'T FOOL WITH THE DEVIL!! Dale in T-Bay