Lime rosin is also called calcium fat. Calcium soap containing unsaponifiable rosin is produced by the reaction of rosin acid with insufficient lime. A yellowish almost transparent solid. The softening point is 100 C and the acid value is 100. When heated, it dissolves in tung oil or linseed oil. Lime rosin, this product is made of first-class rosin and lime by high temperature reaction, used in paint.