BSU Liquid, a hexasulpho type fluorescent whitening agent used in the coating and paper industry, has several applications for enhancing the whiteness and brightness of treated paper. Some common applications include:

1. Paper Coating: It is primarily used in the coating process of paper production. BSU Liquid is applied as a treatment to the paper surface to impart high to very high levels of whiteness and brightness. The liquid is typically added to the coating mixture or applied directly onto the paper surface during the coating process.
2. Enhanced Optical Properties: By using the Liquid, paper manufacturers can achieve papers with significantly improved whiteness and brightness. This is particularly advantageous in applications where visual appeal and high-quality appearance are important, such as in printing, packaging, or premium paper products.
3. Offset Printing: It can be applied to paper used for offset printing. The enhanced whiteness and brightness of the treated paper contribute to vibrant and visually appealing printed materials. BSU Liquid helps in achieving crisp and clear printed images.
4. Packaging Materials: The liquid finds applications in the production of packaging materials. It enhances the visual appeal of packaging paper and board, making them more attractive and eye-catching for consumers.
5. Specialty Paper Products: Specialty paper products, such as art papers, coated papers, or premium stationery, can benefit from the use of BSU Liquid. It adds a high level of whiteness and brightness, giving these products a superior visual appearance and a more professional look.

It’s important to note that the specific application methods, quantities, and guidelines for BSU Liquid may vary depending on the desired results, the characteristics of the paper, and the manufacturer’s recommendations. Therefore, it is advisable to follow the instructions provided by the manufacturer for optimal usage and to achieve the desired whiteness and brightness effects.