Fillers and coating materials are used to enhance the appearance, printability, and performance of paper products. Calcium carbonate serves as a widely used filler to improve brightness, opacity, and surface smoothness while reducing fiber consumption. Tapioca starch functions as a coating binder, contributing to surface strength and ink absorption. These materials are essential in the production of high-quality printing, packaging, and specialty paper grades.
Process and utility chemicals support overall mill operations and chemical efficiency. Quick lime plays a key role in the causticizing process for chemical recovery and is also used in water treatment to ensure system stability. While not part of the final paper product, such chemicals are essential for maintaining smooth operations, optimizing resource use, and ensuring sustainable paper production.
Pulping and bleaching chemicals play a critical role in transforming raw materials like wood chips or recycled paper into high-quality pulp. Alkaline agents such as caustic soda help break down lignin and separate cellulose fibers in the kraft process. Bleaching agents, including hydrogen peroxide and sodium chlorate, are used to whiten and purify pulp by removing residual lignin and color impurities. This stage enhances brightness, improves printability, and prepares the pulp for high-grade paper production.