Okay, couldn't find anything on this using the search engine. I am interested in making a small amount of pyrophoric material. I was going to use this method: "An artificial product, which takes fire upon exposure to the air, and hence called air-tinder. It is prepared from alum by the addition of various inflammable substances. The simplest mode of preparing it is to mix three parts of alum with one of wheat flour, and calcine them in a phial or mattrass, until the blue flame disappears, then keep it in the same phial till cold, well stopped with a good cork. In this powder be exposed to the atmosphere, the sulphuret attracts moisture from the air, and generates sufficient heat to.kindle the carbonaceous matter mingled with it.". Will this work because I have my doubts. Also, what roll does the alum play? Does it just act as a divider or does it take place in the reaction? I there even a reaction going on besides the burning of wheat flour? But above all would this even work? It just seems to easy to work in my opinion.