Why the ancient wooden ship will not rot in the sea driving

Tung oil and paint sealing technology: traditional Chinese ships use tung oil to seal the hull, is a special technology of the ship anticorrosion. Tung oil is China's specialty oil tree species, the main places of origin are Yunnan, Jiangxi, Sichuan, Hubei, Anhui and other places, by the tung oil seeds (seeds containing 30% ~ 41%) of the oil extracted. As a ship sealing and protection of traditional antiseptic vegetable oil, mainly for tung acid glycerides. Light yellow, semi-transparent, viscous, acid and alkali resistance and strong permeability, etc., used for coating the surface of wooden ship materials, corrosion, water, moisture, rapid drying, high temperature resistance, strong adhesion and other effects. Tung oil is also used as a mixing agent for twisted seam putty.

Traditional Chinese ships use tung oil for the first sealing, the second use of paint for sealing. Lacquer trees are commonly grown in southern China, and the use of lacquer to seal wood has a history of at least 2,000 years in China. Chinese ancient ships in the completion of the water before the launch, are to use tung oil and paint two times antiseptic sealing, to ensure the durability of the ancient ships in the water.