Search results
Results from the WOW.Com Content Network
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 .
SAP Center at San Jose (originally known as San Jose Arena and HP Pavilion at San Jose) is an indoor arena located in San Jose, California. Its primary tenant is the San Jose Sharks of the National Hockey League , for which the arena has earned the nickname "The Shark Tank".
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 ...
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.
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 ...
Resin is usually collected by causing minor damage to the tree by making a hole far enough into the trunk to puncture the vacuoles, to let sap exit the tree, known as tapping, and then letting the tree repair its damage by filling the wound with resin. This usually takes a few days.
In the United States the pine tree Pinus palustris, known as the longleaf pine, once covered as much as 90,000,000 acres (360,000 km 2) but due to timber harvesting was reduced by between 95% and 97%. The trees grow very large (up to 150 feet), taking 100 to 150 years to mature and can live up to 500 years.
To tap into the sap producing layers of the tree, harvesters used a series of hacks to remove the pine bark. Once debarked, pine trees secrete crude turpentine onto the surface of the wound as a protective measure to seal the opening, resist exposure to micro-organisms and insects, and prevent vital sap loss. Harvesters wounded trees in V ...