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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 ]
Tall oil rosin is produced during the distillation of crude tall oil, a by-product of the kraft paper making process. The collection and processing of rosin is called Naval Stores. [1] The separation of the oleo-resin into the essential oil (spirit of turpentine) and common rosin is accomplished by distillation in large copper stills. The ...
1912 postcard. The naval stores industry produces and markets products derived from the oleoresin of pine trees, including rosin, tall oil, pine oil, and turpentine.It does this by collecting and processing organic forest products refined from slash pine and longleaf pine trees (genus Pinus).
There are three types of rosin: gum rosin (from pine tree oleoresin), wood rosin (obtained by extraction of tree stumps), and tall oil rosin (obtained from tall oil, a byproduct of kraft paper process). Gum rosin has a milder odor and lower tendency to crystallize from solutions than wood rosin, and is therefore preferred for flux applications.
As the chief component of rosin, abietic acid is approved by the US FDA as a miscellaneous food additive. [8] Abietic acid is considered a "nonhazardous natural substance" in tall oil ("liquid rosin"). [5] In the U.S., abietic acid is listed in the inventory of the Toxic Substances Control Act. Abietic acid is the primary irritant in pine wood ...
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Naval stores refers to the industry that produces rosin, turpentine, tall oil, pine oil, and other oleoresin collected from conifers. The term was originally applied to the compounds used in building and maintaining wooden sailing ships.