Waksupi is right. Back in the early 80's, my grandmother told me not to be messing with it, and she was right. How she knew about Potassium Chlorate will forever be a mystery, but always listen to grandma. The stuff is not something to just have sitting around the house. And this coming from someone that does not scare easy either. I'm all for making our own caps, but there has to be a safer way.