Elastics present the following properties:
1. No distortion beyond elasticity limit.
2. They are physically homogenous.
3. They are isotropic (deliver force in any direction).
In general terms, elastics return to their original dimensions immediately after great distortion; these elastics can be made out of natural rubber, latex or synthetic rubber polymers (rubber, butylpolypropene, ethilpropilane or silicon).
Intraoral elastic packages contain 50 or 100 elastics;
the force can be light, medium, heavy or super heavy (depending on the diameter and thickness of the elastic).
The elastic force is measured in ounces (1 Oz = 28.34 g) and the packages containing the elastics are
marked with a color, letter or animal, etc. (depending on the trademark) to distinguish the force of the elastic
enclosed in the package.