Purpose: Thinning oil colour and cleaning brushes and other art materials. Composition: Portuguese gum turpentine (distillate from resinous balsam of the pine tree) • Makes oil paint leaner (use in lower layers) • Allows brush stroke to run • Suitable for removing (dry) varnish coats • Suitable for dissolving (natural) resins • Also for thinning mediums and varnishes for oil colour • Flammable