Synthetic barium sulphates have been familiar on the coatings market for more than one hundred years. Originally used as extenders for simple, low-cost systems, in the course of time they have continuously gained in importance as inorganic additives for special high-quality coatings. Special production methods, various treatments and the design of special crystallites now permit customized solutions for the most diverse range of requirements. Synthetic barium sulphate is totally inert under normal conditions, and possesses high resistance to outdoor applications.