Titanium White **** The most popular white, Titanium White is inert and non-reactive under most ordinary conditions. It has greater opacity than lead or zinc but tends to yellow in the short term. It is slower drying than lead but faster than zinc. It handles and mixes well, and its surface qualities may be strengthened by mixture with zinc oxide which also helps reduce the sometimes too intense tinting power inherent in titanium pigment. Zinc White **** Zinc Oxide is more transparent than lead and its surface qualities are more brittle. It does not have the same brushing qualities, is slower drying and does not react to sulphur. It is whiter than lead. Quick Drying White **** Made of titanium white, calcium carbonate, poppy oil, alkyd resin and petroleum solvent. This quick-drying white is best suited as an undercoat offering exceptional qualities of surface adhesion and durability. Non-yellowing and non-cracking, this white, when coated thinly (0.15mm) will dry in 4 to 5 hours, while application by brush, knife, squeegee or spatula in 2mm to 3mm textured thickness will take approximately 24 hours. Dilute and clean petroleum solvent.