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Resin circulates throughout a coniferous tree and a few others, and serves to seal damage to the tree. Harvesting pine resin dates back to Gallo-Roman times in Gascony . Tapping pines may either be done so as to sustain the life of the tree, or exhaustively in the years before the tree is cut down.
Between 3 and 4 kilograms of Pitch could be obtained from a single trunk in one year. So, in order for a Resin Worker to live modestly with his family, he had to extract resin from about 3000 trees. [3] The workdays usually began before sunrise with the commute to the work area in the pine forest, and Resin Workers would often work 10 to 12 hours.
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.
Resin extraction – Process of collecting sap or resin from pine trees; Balsam of Peru – Type of tree balsam – used in food and drink for flavoring, in perfumes and toiletries for fragrance, and in medicine and pharmaceutical items. Mastic (plant resin) – Resin traditionally obtained from the mastic tree on the island of Chios
Using wood as a raw material, resinous pine wood (Kienholz) was turned into resin and pitch through a burning process. The burning of resin was sometimes strictly regulated in order to prevent the wanton damage of the forest. [citation needed] In the 19th century, larger and larger facilities were built to extract resin.
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.
Oleoresins are semi-solid extracts composed of resin and essential or fatty oil, obtained by evaporation of the solvents used for their production. [1] The oleoresin of conifers is known as crude turpentine or gum turpentine , which consists of oil of turpentine and rosin .
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]