what is resin

Resin is a solid or highly viscous substance of plant or synthetic origin that is typically convertible into polymers. Resins are usually mixtures of organic compounds and can be derived from organic or synthetic sources. Plants secrete resins for their protective benefits in response to injury, which protect the plant from insects and pathogens. Resin has become popular in the crafting community as it can be used to create a highly durable plastic material. Resin can be used to create surface protection and stand-alone structures, and when combined with a reinforcement material, such as glass fiber or carbon fiber, it can give rise to composites. Resin-based composites are a combination of two or more materials with different chemical and physical characteristics that form a material that is highly durable. Natural resins are typically fusible and flammable organic substances that are transparent. Most natural resins are exuded from trees, especially pines and firs, and resin formation occurs as a result of injury to the bark from wind, fire, lightning, or other cause.