Effects of TiO2 Partial Substitution by Various Extenders on Architectural Interior Paints

The most commonly used pigment in paint formulations is titanium dioxide (TiO2), which is a white particle with providing exceptional hiding power to the paint film owing to high refractive index. Since titanium dioxide is an expensive component, cost savings are realized through the reduction of titanium dioxide in architectural interior paint formulations. In this work, a partial substitution of TiO2 up to 30 % was attempted with low particle size huntite, calcite and Neuburg siliceous earth. Increases in hiding power, whiteness and gloss values were achieved successfully by different amounts of huntite substitutions.