The art and science of Cotton & Blended Fabric Processing demand precision and high-quality additives to achieve desired aesthetic results. NINGBO INNO PHARMCHEM CO.,LTD. offers Optical Brightening Agent 4BK, an essential component for textile manufacturers aiming for unparalleled whiteness and brightness in their fabrics. Our OBA 4BK, a powerful fluorescent whitening agent, imparts a desirable bluish shade that effectively neutralizes any natural yellowing in cotton and polyester/cotton blends, yielding a crisp, clean appearance.
For optimal results in cotton fabric whitening, the choice of brightening agent is critical. Optical Brightening Agent 4BK is specifically engineered for excellent performance in exhaust and one-bath processes, simplifying textile treatment. Manufacturers seeking to buy Optical Brightening Agent 4BK for cotton will find NINGBO INNO PHARMCHEM CO.,LTD. to be a reliable partner, providing a product known for its strong fluorescence and high light and chemical stability. This ensures that the whiteness achieved is not only immediate but also long-lasting, even under various environmental conditions.
Our commitment to quality as a textile auxiliary supplier means that Optical Brightening Agent 4BK offers good acid stability and is stable in the presence of perborate and H2O2, essential for integrated scouring, bleaching, and whitening processes. The superior whitening performance of our product significantly enhances the value of finished fabrics, meeting consumer demands for visually appealing textiles. Contact NINGBO INNO PHARMCHEM CO.,LTD. today to discuss how our OBA 4BK can optimize your Cotton & Blended Fabric Processing, providing competitive advantages and superior fabric quality at an attractive fluorescent whitening agent for textiles price.
Manufacturing Facilities






Professional Export Experience
to Global Customers
1. 20 years of R&D, manufacturing and sales experience, serving customers in 60 countries and regions around the world;
2. Own R&D laboratory, pilot platform and large-scale production workshop, which can meet the audit requirements of global customers;
3. We can satisfy customers' perfect transition from small scale lab requirements (gram level) to commercialization requirements (hundred tons level).
A: We don't have Minimum Order Quantity, exact quantity should be provided before quotation for us to calculate the exact cost.
A: We don't provide free samples due to lots of request and expensive international courier's cost, we can deduct the sample charge after commercial order placed.
A: Our payment terms: Small or sample order: T/T IN ADVANCE. Commercial order: First order should be by T/T IN ADVANCE or L/C at sight, and following orders T/T 30~90days is acceptable subject to approval of credit application.