The processing of cellulosic fibers, especially cotton, demands specialized chemical auxiliaries to achieve superior whiteness and overall fabric quality. NINGBO INNO PHARMCHEM CO.,LTD. proudly offers OBA 4BK, an Optical Brightening Agent that stands as an essential Fluorescent Whitening Agent (FWA) for enhancing cellulosic fiber textiles. As a dedicated supplier of FWA 4BK for cotton, we ensure your production processes are supported by top-tier chemical solutions.


OBA 4BK is characterized by its gray-greenish powder appearance and anionic stilbene derivative structure, which delivers a distinct blue-white shade. This makes it ideal for achieving the desired brilliant white maximum on cellulosic fibers. For textile manufacturers seeking reliable auxiliary agents for cellulosic fibers, OBA 4BK offers unmatched performance. It demonstrates excellent washfastness, ensuring the enhanced brightness endures through countless washes, a crucial factor for the longevity and appeal of cotton products.


Our FWA 4BK is highly suitable for exhaust processes, which are commonly used in cotton fabric processing chemicals applications. It boasts very high bath exhaustion and good solubility in water, contributing to efficient and economical operations. Its robust stability to alkalis, peroxide, and electrolytes further solidifies its position as a reliable choice in diverse textile environments. NINGBO INNO PHARMCHEM CO.,LTD. invites you to buy textile auxiliary agents that guarantee exceptional results for your cellulosic fiber productions. OBA 4BK is not just a chemical; it's a commitment to quality and brightness in every fiber.