Coating Terms

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General name for oils obtained by reaction of glycerine with fatty acids that do not contain unsaturation or contain limited unsaturation. There is no distinct definition of non-drying oils as in the case of drying oils. However, oils with an average unsaturation value smaller than or equal to one double bond per one fatty acid chain, are practically classified as “non-drying oils”.
Natural vegetable oils that contain unsaturated fatty acids connected to three hydroxyl group of glycerine molecule. Drying oils dry by polymerizing with air oxygen via opening of the double bonds on fatty acids.
General name of oils, formed by reaction of glycerine with fatty acids with limited unsaturation. (Semi-drying oils do not have a certain definition as the drying oils). Practically, it is conveninent to define oils as semi-drying if they have an approximately 1.5 - 2 unsaturation per fatty acid chain.