Okay, my current science project is about materials used at home, and I need help with the following: Origin of one of the MaterialsHistory of the ObjectWhy these materials were chosenWell we all know that there is only one material which is Plastic.Thanks for all your help guysSilver One
Plastic is chosen for hairbrushes because it weighs less than metal and its heat conductivity is lower (if you touch you head by a metal hairbrush it feels cold). If you drop a plastic hairbrush or bend it a little, it won't break, so plastic is a rather safe material. Besides, it's easy to give different shapes to plastic. as for the origin and history, see Wikipedia
