Paintings that are made with drying oil on a canvas or any paper are known as oil painting. The oils commonly used for this are linseed oil, poppy seed oil, walnut oil and safflower oil. The property of various oils tends to dry the painting at different times and the shades come out different too. If the artist requires different effects, he can use various oils in one painting.
Oil paint takes time to dry making use of the oxidation process, not evaporation. It generally takes 5-14 days to completely dry, depending on the type of oil used for paint. Oil paintings can be preserved for years and years to come. The famous art work ‘Monalisa’ by Leonardo Da Vinci is an exemplary example of oil painting.