Lithopone is a widely used white pigment that has been in use since the late 19th century. It is composed of barium sulfate (BaSO₄) and zinc sulfide (ZnS), and is known for its excellent whiteness, hiding power, and chemical stability. Compared to the more expensive titanium dioxide, lithopone is considered an economical and practical alternative in many industrial applications, especially where cost efficiency is a priority.
In the coatings and paint industry, lithopone is commonly used in interior wall paints and primers. It offers strong coverage, enhances coating uniformity, and gives surfaces a whiter, smoother appearance. Although its light resistance is lower than that of titanium dioxide, lithopone performs well in indoor environments that are not directly exposed to sunlight, making it a reliable ingredient in low-cost paint formulations.
In plastic and rubber manufacturing, lithopone serves as both a filler and pigment. It helps improve the appearance and gloss of finished products, enhances mechanical strength, and increases overall durability. In the printing industry, lithopone is used in inks to improve color brightness and coverage, resulting in sharper and more vibrant printed images.
Lithopone is also used in the production of paper and flooring materials. It can be added to pulp to improve the whiteness and opacity of paper, or used as a pigment filler in materials like linoleum flooring. In some cases, lithopone is found in cosmetics and personal care products, such as soaps and face powders, thanks to its non-toxic nature and fine texture, which make it suitable as an inert filler.
Overall, lithopone is a cost-effective, versatile, and stable white pigment. While it may not be as bright or weather-resistant as titanium dioxide in outdoor applications, it remains a dependable and economical choice in a wide range of everyday industrial and consumer products.