the major oils described above, have received much more attention as fuel oils than other plant oils. Copaiba, an oleoresin tapped from species of genus Copaifera. Used in Brazil as a cosmetic product and a major source of biodiesel. Jatropha oil, widely used in India as a fuel oil. Has attracted strong proponents for use as a biofuel. Jojoba oil, from the Simmondsia chinensis, a desert shrub. Milk bush, popularized by chemist Melvin Calvin in the 1950s. Researched in the 1980s by Petrobras, the Brazilian national petroleum company. Nahor oil, pressed from the kernels of Mesua ferrea, is used in India as a lamp oil. Paradise oil, from the seeds of Simarouba glauca, has received interest in India as a feed stock for biodiesel. Petroleum nut oil, from the Petroleum nut (Pittosporum resiniferum) native to the Philippines. The Philippine government once explored the use of the petroleum nut as a biofuel. Pongamia oil (also known as Honge oil), extracted from Millettia pinnata and pioneered as a biofuel by Udipi Shrinivasa in Bangalore, India. Drying oils Drying oils are vegetable oils that dry to a hard finish at normal room temperature. Such oils are used as the basis of oil paints, and in other paint and wood finishing applications. In addition to the oils listed here, walnut, sunflower and safflower oil are also considered to be drying oils. Dammar oil, from the Canarium strictum, used in paint as an oil drying agent. Can also be used as a lamp oil. Linseed oil's properties as a polymer make it highly suitable for wood finishing, for use in oil paints, as a plasticizer and hardener in putty and in making linoleum. When used in food or medicinally, linseed oil is called flaxseed oil. Poppyseed oil, similar in usage to linseed oil but with better color stability. Stillingia oil (also called Chinese vegetable tallow oil), obtained by solvent from the seeds of Sapium sebiferum. Used as a drying agent in paints and varnishes. Tung oil, used as an industrial lubricant and highly effective drying agent. Also used as a substitute for linseed oil. Vernonia oil is produced from the seeds of the Vernonia galamensis. It is composed of 73–80% vernolic acid, which can be used to make epoxies for manufacturing adhesives, varnishes and paints, and industrial coatings. Other oils A number of pressed vegetable oils are either not edible, or not used as an