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Pine tar is a form of wood tar produced by the high temperature carbonization of pine wood in anoxic conditions (dry distillation or destructive distillation). The wood is rapidly decomposed by applying heat and pressure in a closed container; the primary resulting products are charcoal and pine tar .
The pitch shown in this University of Queensland pitch drop experiment has a viscosity approximately 100 billion times that of water. Naturally occurring asphalt/bitumen, a type of pitch, is a viscoelastic polymer. This means that even though it seems to be solid at room temperature and can be shattered with a hard impact, it is actually fluid ...
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.
Wood from other locations can also be used, such as the joints where limbs intersect the trunk. Although most resinous pines can produce fatwood, in the southeastern United States the wood is commonly associated with longleaf pine ( Pinus palustris ), which historically was highly valued for its high pitch production.
Conservationists are teaming up with the U.S. Forest Service and logging companies to clear scorched land and make room for new reforestation projects.
Destructive distillation is a chemical process in which decomposition of unprocessed material is achieved by heating it to a high temperature; the term generally applies to processing of organic material in the absence of air or in the presence of limited amounts of oxygen or other reagents, catalysts, or solvents, such as steam or phenols.
A controlled burn in Niagara Falls, Ontario where the Burn Boss is watching a back fire (lit first and in the background) move towards a head fire (in the foreground) Back burning or a back fire is the term given to the process of lighting vegetation in such a way that it has to burn against the prevailing wind.
Wood ash is the powdery residue remaining after the combustion of wood, such as burning wood in a fireplace, bonfire, or an industrial power plant. It is largely composed of calcium compounds, along with other non-combustible trace elements present in the wood, and has been used for many purposes throughout history.