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With the demise of wooden ships, those uses of pine resin ended, but the former naval stores industry remained vigorous as new products created new markets. First extensively described by Frederick Law Olmsted in his book A Journey in the Seaboard Slave States (1856), [3] the naval stores industry was one of the economic mainstays of the southeastern United States until the late 20th century.
These materials were used for water- and weather-proofing wooden ships. were traditionally used for Masts, spars, and cordage needed protecting, and hulls made of wood required a flexible material, insoluble in water, to seal the spaces between planks. Pine pitch was often mixed with fibers like hemp to caulk spaces which might otherwise leak.
Pine resin (sap) has been used by various tribes to waterproof baskets, pails, and boats. The Ojibwe also used pine resin to successfully treat infections and even gangrenous wounds, [40] because pine resin apparently has a number of quite efficient antimicrobials. Generally, a wet pulp from the inner bark, or pine tar mixed with beeswax or ...
Rosin (/ ˈ r ɒ z ɪ n /), also known as colophony or Greek pitch (Latin: pix graeca), is a resinous material obtained from pine trees and other plants, mostly conifers. The primary components of rosin are diterpenoids, i.e., C 20 carboxylic acids. Rosin consists mainly of resin acids, especially abietic acid. [1]
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]
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Many different kinds of resins may be used to create a varnish. Natural resins used for varnish include amber, kauri gum, dammar, copal, rosin (colophony or pine resin), sandarac, balsam, elemi, mastic, and shellac. Varnish may also be created from synthetic resins such as acrylic, alkyd, or polyurethane. A varnish formula might not contain any ...
Abietic acid is found in rosin obtained from pine trees. [3] Pure abietic acid is a colorless solid, but commercial samples are usually a glassy or partly crystalline yellowish solid that melts at temperatures as low as 85 °C (185 °F). [4]
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