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Rosin (/ ˈ r ɒ z ɪ n /), also known as colophony or Greek pitch (Latin: pix graeca), is a solid form of resin obtained from pine trees and other plants, mostly conifers, primarily through heating fresh liquid resin to vaporize the volatile liquid terpene components. Used widely in various industries and arts, rosin appears as a semi ...
Its unique flavor is said to have originated from the practice of sealing wine vessels, particularly amphorae, with Aleppo pine resin in ancient times. Before the invention of impermeable glass bottles, oxygen caused many wines to spoil within the year. Pine resin helped keep air out, while infusing the wine with resin aroma.
Tall oil, also called liquid rosin or tallol, is a viscous yellow-black odorous liquid obtained as a by-product of the kraft process of wood pulp manufacture when pulping mainly coniferous trees. [ 1 ] [ 2 ] The name originated as an anglicization of the Swedish tallolja ('pine oil'). [ 3 ]
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]
These materials include rosin, tall oil, pine oil, and turpentine. Crude gum or oleoresin can be collected from the wounds of living pine trees. The term naval stores originally applied to the organic compounds used in building and maintaining wooden sailing ships, a category which includes cordage, mask, turpentine, rosin, pitch and tar. These ...
The V-shaped cuts are called "catfaces" for their resemblance to a cat's whiskers. These marks on a pine tree indicate it was used to collect resin for turpentine production. [11] Turpentine (and rosin) are produced as naval stores. [12]
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Resin acids dissolve in alkalis to form resin soaps, from which the resin acids are regenerated upon treatment with acids. Examples of resin acids are abietic acid (sylvic acid), C 20 H 30 O 2, plicatic acid contained in cedar, and pimaric acid, C 20 H 30 O 2, a constituent of galipot resin. Abietic acid can also be extracted from rosin by ...
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