After
1. Mineral oil
Mineral oil group is derived from crude oil, i.e. oil and gas to crude oil, gasoline, diesel, kerosene, heavy oil, and then extract the mineral oil base, leaving the end of the last the bitumen. Transparent mineral oil-based microstrip light amber color, a general color as salad oil.
Mineral oil usually low cost, but easily oxidized than mineral oil based, while today there are mineral oil imports various additives added, but still life of about six months.