Tung oil (English: tung oil)

Japanese: キリ油(桐油) - きりあぶら（英語表記）tung oil

Also called "touyu." Seed kernel oil from the genus Jatropha. Three species are actually used to extract oil: Jatropha formosum (produced in Hokuriku, San'in, and southern Kanto), Jatropha formosum (produced in China), and Jatropha formosum (produced in southern China). The oil is extracted by first fermenting and crushing the mature fruit to separate the seeds, then drying and pressing them under hot and cold pressure. Usually, two pressings are performed, and about 3 to 3.3 liters of oil can be obtained from 180 liters of seeds. It is a typical drying oil, and its main components are glycerides of α-eleostearic acid (80%) and oleic acid (15%), with small amounts of palmitic acid and stearic acid glycerides.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

〈とうゆ〉ともいう。アブラギリ属植物の種子核油。実際の採油には，ニホンアブラギリ(生産地は北陸，山陰，南関東)，シナアブラギリ(中国)，カントンアブラギリ(中国南部)の3種が用いられる。搾油は，まず成熟果実を発酵，粉砕して種子を分離し，乾燥後温圧法によって行われる。通常2番しぼりまで行い，種子180lから約3～3.3lの油が得られる。代表的な乾性油で，主成分はα‐エレオステアリン酸(80％)，およびオレイン酸(15％)のグリセリドであり，そのほか少量のパルミチン酸およびステアリン酸グリセリドを含有する。

出典　株式会社平凡社世界大百科事典第２版について　情報

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