Dude, I think your hair is on fire .. Yeah it is HAHA!

     If you've ever had long hair you know the hassle that comes with this carefree style. When I did have long hair I preferred the "rolled out of bed" look, but most prefer the moussed up, hairspray or overly gelled look. My friend Daniel was one of those people. One day when we were hanging out, he decided to smoke a cigarette. Upon lighting it in his mouth, a small piece of his hair combusted, producing a small glow that I noticed. I then chuckled the words, "Dude, I think your hair is on fire .. Yeah it is HAHA!" He quickly muttered an obscenity and put it out, we got quite the laugh.

     So what is it that makes these commonly used products flammable and how can you trust putting them in your hair? Not just styling products, but also shampoos and conditioners, contain solvents such as alcohol and hydrocarbons which are flammable. Another ingredient in styling products is polyvinylpyrrolidine, which is also used to glue the layers of wood in plywood together. Some hairsprays use natural polymers and solvents like vegetable gums dissolved in alcohol(still flammable). One popular ingredient in these "natural" sprays is gum arabic, it's made from the sap of certain trees that grow in the Sudan. So the answer is: You can't really trust any hair product and have to measure the benefits from the risks for the sake of your hair.
http://antoine.frostburg.edu/chem/senese/101/consumer/faq/hairspray-ingredients.shtml