Containing no zinc or alkyd, Williamsburg Titanium Oil Ground is made with titanium dioxide and marble dust ground in 100% alkali-refined linseed oil. It offers just the right amount of tooth and absorbency. This high quality oil ground contains no lead. Composed of Titanium white, marble dust, and linseed oil for flexibility. A soft, fine white. So heavy it can be cut in half with turpentine.