Pitch (resin)
Resin / From Wikipedia, the free encyclopedia
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This article is about resin. For other uses, see Pitch (disambiguation).
Pitch is a viscoelastic polymer which can be natural or manufactured, derived from petroleum, coal tar,[1] or plants. Pitch produced from petroleum may be called bitumen or asphalt, while plant-derived pitch, a resin, is known as rosin in its solid form. Tar is sometimes used interchangeably with pitch, but generally refers to a more liquid substance derived from coal production, including coal tar, or from plants, as in pine tar.[2]