Tri-Art Stand Oil - Tri-Art's Stand Oil is a purified polymerized linseed oil. This product has a superior resistance to yellowing and darkening than traditional linseed oil making it the ideal oil painting medium. This oil is made by heating refined linseed oil in a vacuum, allowing it to partially polymerize without oxidization. As a result, it produces a tougher film than linseed oil while maintaining a high degree of flexibility. Tri-Art's Stand Oil is paler in colour and has a greater viscosity than linseed oil and will also serve to increase the flow and open time of oil paints.