Holbein ranks as one of the world's finest lines of professional oil colors. The formulation of each color is modified individually to compensate for the inherent differences in the working characteristics of pigments. The result is an even consistency across the entire palette of color.
Holbein maintains its quality standards by test inspection of pigment purity, color tone, applicability and adhesion, physical stability, light stability, thermo-stability, and anti-bacterial stability. Pigments are ground from three to five times as necessary to achieve a universally consistent viscosity. The manufacturing process in each of the preparation, mixing, grinding, adjustment, and filling stages is monitored by reference to optimum quality standards.
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.
View the color chart here: http://www.holbeinartistmaterials.com/artist-oil-color-chart/