Resin is a sticky, liquid substance that usually hardens when exposed to air. Hardened resin is used to moisten and sharpen bow hairs for string instruments (i.e. viola, violin, cello, double bass, viola da gamba). Synthetic resins are plastics, such as Bakelite.
- Wile, Dr. Jay L. Exploring Creation With General Science. Anderson: Apologia Educational Ministries, Inc. 2000