I was reading an old science experiment book, and one of the experiments was about creating smoke from your fingertips. The experiment went like this:
Get a box of matches, and peel the paper with the striking surface off. Peel the layers of paper away untill you get just the strike surface and very little of the paper backing. Place it on a metal surface (with the red phosphorus side down), and light the paper (well it doesn’t burn really so you have to heat it with a flame). After the paper is burned a resin like residue should be left on the metal. Then, you wipe up some of it onto your fingers and rub your fingers together. When you start rubbing smoke should start coming off of your fingers in wisps. Well, I tried it and it does work. I am wondering, what is the residue, and why does it ‘smoke’ when friction is applied?