Resin

Resin is a sticky, liquid substance that usually hardens when exposed to air.[1] 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.

## References[edit]

1. ↑ Wile, Dr. Jay L. Exploring Creation With General Science. Anderson: Apologia Educational Ministries, Inc. 2000