Tung oil or China wood oil is a drying oil obtained by pressing the seed from the nut of the tung tree (Vernicia fordii). As a drying oil, tung oil hardens (dries) upon exposure to air. The resulting coating is transparent and plastic-like, a property exploited in most of its applications which include wood finishing and the composition of oil paints and printing inks. When applied in many fine coats over wood, tung oil slowly cures to a satin “wetted wood” look with slight golden tint. It resists liquid water better than any other pure oil finish, though it still provides little protection against water vapor exchange or scratches. Tung oil does not darken noticeably with age and is claimed to be less susceptible to mold than linseed oil (1).