VIDEO PODCAST: Women Composers - Our special hour-long illustrated feature on women composers includes contributions from Diana Ambache, Gail Wein, Hilary Tann, Natalie Artemas-Polak and Victoria Bond.
Rosin is solidified resin taken from pines and other plants and trees, mostly conifers. It's made by heating liquid resin to evaporate the liquid.
In music, it's used in blocks or cakes by string players, who rub it on their bow hair to help make their instruments' strings vibrate clearly. Some types of rosin are mixed with gold, iron, silver, tin or beeswax to modify the friction and (possibly) the tone produced.