Cotton, a staple in the textile industry, often presents a slightly yellow hue naturally. To achieve the pristine white finish demanded by consumers, effective whitening agents are essential. NINGBO INNO PHARMCHEM CO.,LTD. presents Optical Brightener 4BK, a leading solution for cotton whitening that offers exceptional performance and a brilliant white appearance.

Optical Brightener 4BK is a specialized stilbene derivative that works by absorbing ultraviolet light and fluorescing in the blue region of the visible spectrum. This mechanism effectively masks the yellow cast inherent in cotton fibers, resulting in a brighter, cleaner, and more visually appealing white. The unique bluish-purple shade imparted by 4BK is highly desirable for high-quality textile production.

The application of Optical Brightener 4BK on cotton can be achieved through various methods, with exhaust dyeing and continuous padding being the most common. For exhaust dyeing, typical dosages range from 0.05% to 0.6% (o.w.f), with recommended bath ratios of 1:10 to 1:30, and processing temperatures between 90-100°C for 20-30 minutes. In one-bath scouring and oxygen bleaching processes, similar dosages are used in conjunction with hydrogen peroxide, NaOH, and stabilizers to achieve optimal whitening and cleaning simultaneously.

Crucially, Optical Brightener 4BK is formulated to offer excellent chemical stability. It demonstrates high resistance to alkali, hydrogen peroxide, and perborate, which are commonly used in cotton processing. This stability ensures that the brightening effect is robust and consistent throughout the treatment process, leading to predictable and satisfactory results. Its good water solubility also facilitates easy dispersion and uniform application on cotton fabrics.

NINGBO INNO PHARMCHEM CO.,LTD. emphasizes the importance of proper handling and application to maximize the benefits of Optical Brightener 4BK. While the product is stable, adhering to recommended dosages and processing parameters is key. The company provides comprehensive technical support to assist manufacturers in optimizing their cotton whitening processes, ensuring they achieve the desired high level of whiteness and brightness.

By choosing Optical Brightener 4BK, textile manufacturers can confidently enhance the appearance of their cotton products. The agent’s ability to deliver a superior white finish, coupled with its stability and ease of use, makes it an invaluable asset in achieving market-leading textile quality. NINGBO INNO PHARMCHEM CO.,LTD. is dedicated to powering brighter textiles with innovative chemical solutions like Optical Brightener 4BK.