The term "rubber" is used for any material which when subjected to an external force deforms with a comparatively low load/deflection ratio and regains its original shape quickly and forcibly when the forces applied to it are withdrawn. Based on this definition there are many materials which can be generally classified into the following:

1. Natural rubber

2. Synthetic rubber

Natural rubber is obtained from the bark of the tree Hevea brasiliensis, originally discovered in Brazil. The traditional and centuries old method of slitting the bark and letting the milk-like substance drip down as a thick fluid called "latex" still continues to be the sole method of obtaining natural rubber. The history of natural rubber in Brazil is an exciting tale that changed the lifestyle of the world. The Industrial Revolution and the discoveries that followed were reflected in all sectors of human necessities. Automobiles, locomotives, telephones, electricity, and many innovations in engineering and chemical industries changed the topography, customs, and pace of life in towns and cities. Thanks to its multiple uses in the ever-expanding industries, rubber became a commodity that was in demand worldwide.

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