Tung oil

Tung Oil

Leaves and berries of the tung tree

Tung oil is a drying oil obtained by pressing the seed from the nut of the tung tree (Vernicia fordii). The oil is known for its ability to form a tough, water-resistant finish, making it a popular choice for wood finishing and as a component in paints and varnishes.

History

The use of tung oil dates back to ancient China, where it was used to waterproof ships and as a finish for wooden objects. The oil was introduced to the Western world in the early 20th century and quickly gained popularity due to its superior qualities compared to other oils.

Production

Tung oil is extracted from the seeds of the tung tree, which is native to southern China and other parts of East Asia. The seeds are harvested and then pressed to extract the oil. The oil is then refined and sometimes heat-treated to improve its drying properties.

Properties

Tung oil is known for its excellent water resistance, flexibility, and resistance to mold. It penetrates deeply into wood fibers, providing a durable finish that enhances the natural grain of the wood. Unlike some other oils, tung oil does not darken significantly with age.

Uses

Tung oil is widely used in the woodworking industry as a finish for furniture, flooring, and other wooden items. It is also used in the production of oil-based paints, varnishes, and linoleum. Due to its non-toxic nature, it is sometimes used in food-safe applications, such as finishing wooden cutting boards and utensils.

Application

Applying tung oil involves cleaning the wood surface, applying the oil with a brush or cloth, and allowing it to penetrate the wood. Multiple coats are often applied, with each coat being allowed to dry before the next is applied. The final finish is typically buffed to a soft sheen.

Related pages

• Drying oil
• Wood finishing
• Varnish
• Linoleum