These products are distilled tall oils (DTO) containing 10–40% rosin acids. It combines the advantages of fatty acids and rosin acids, making it an ideal raw material for functional products like metalworking fluids, oil field chemicals, soaps, cleaners and alkyd resins. The material helps provide hardness improvement for indoor varnishes with high gloss and excellent water and alkali resistance. When used as magnesium soaps, they can be very efficient dispersants for fuel oils.
The materials are from European, and especially Scandinavian, origin with a specific characteristic to have more double bonds (i.e. higher Iodine Value) than DTO with an origin closer to the equator.