Tung oil tung oil is the only drying oil that will polymerize 100% (completely harden). Linseed oil, for example, never completely hardens. Since tung oil has become popular as an environmentally friendly wood finish, some products labelled as "tung oil" are actually blends containing other oils, varnishes, solvents, or chemical driers, and may even containing no tung oil at all Products labeled "Danish oil" may be tung oil or they may be polymerized linseed oil. The product packaging will usually clearly state if it is pure tung oil. Heating tung oil to about in an oxygen-free environment will substantially increase the viscosity
Narva Oil Plant Narva Oil Plant Narva Oil Plant (), a subsidiary of Eesti Energia, is a producer of shale oil from oil shale. It operates a commercial scale shale oil retorting plant, located in Auvere near Narva, Estonia. The oil shale retorting plant (the UTT-3000 refinery) was built in the late 1970s next to the Eesti Power Plant to provide shale oil as a start-up fuel for the power plants. The plant was commissioned in 1980. Since the beginning of the 1990s, the oil plant operated as a part of the Narva Power Plants. In September 2007, the oil plant was separated