In the paper industry, achieving a high level of brightness and visual whiteness is crucial for product quality, particularly for printing and packaging papers. Optical brighteners, also known as fluorescent whitening agents (FWAs), are indispensable chemical additives that transform paper aesthetics by making it appear brighter and whiter. As a specialized supplier of these advanced chemical auxiliaries, we provide insights into how these agents elevate paper products.

Optical brighteners function by absorbing ultraviolet (UV) light and re-emitting it as visible blue light. This phenomenon counteracts the natural yellowing of paper fibers, resulting in a significantly whiter and more appealing appearance. Their application is multifaceted, ranging from incorporation into the paper pulp during manufacturing to application in surface sizing and coating formulations.

For paper manufacturers aiming to buy optical brighteners, understanding their integration into the production process is key. In the pulp stage, FWAs are typically added before cationic retention aids or sizing agents to ensure optimal fixation onto the cellulose fibers. The dosage often ranges from 0.05% to 0.4% based on the absolute dry weight of the pulp. When used in surface sizing, they can be combined with common agents like CMC, PVA, or starch, and applied as an aqueous solution to the paper surface. Similarly, in coating formulations, FWAs can be added at any stage to enhance the overall brightness of the coated paper, providing a brilliant and clean finish.

The choice of FWA depends on the specific requirements of the paper product, including desired shade (e.g., bluish or reddish), pH stability, and compatibility with other additives. Our range of fluorescent whitening agents is developed with these considerations in mind, offering excellent performance across various paper applications. As a reliable supplier from China, we ensure a consistent supply of high-purity products that meet international standards, such as OEKO-TEX ECO PASSPORT Certification, guaranteeing safety and environmental responsibility.

By incorporating our optical brighteners, paper manufacturers can achieve superior brightness, improve print contrast, and enhance the overall visual quality of their products. This directly translates to increased customer satisfaction and market competitiveness. For businesses looking to source effective paper chemicals and elevate their product's appeal, partnering with an experienced supplier is essential. Contact us to discuss your specific needs and explore how our fluorescent whitening agents can benefit your paper production processes. We offer competitive pricing and expert support for bulk purchases.