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The papermaking industry demands high whiteness, brightness, and uniformity. As key additives, fluorescent brighteners enhance visual whiteness by absorbing UV light and emitting blue light, boosting paper quality and competitiveness. HairunChem offers three high-efficiency brighteners—2BL, 4PL, and HST—suitable for pulp addition, surface sizing, and coating, providing eco-friendly solutions for various paper types including cultural, packaging, and specialty papers.
Fluorescent whitening solutions for the paper industry
Recommended products: 
Fluorescent Brighteners 2BL, BBU, VBL 

Solutions: 
Improve paper whiteness: Suitable for addition into pulp to improve overall whiteness and make paper brighter and whiter. 
Compatible with multiple additives: Can be used in conjunction with starch, CMC, PVA, etc., without affecting paper performance. 
Acid and alkali resistance and stability: suitable for different papermaking processes to ensure long-term stability. 

Application industries: 
Cultural paper, Office paper, Packaging paper, etc.
Pulp whitening
Recommended products: 
Fluorescent brighteners 4PL, HST 

Solutions: 
Optimize paper optical properties: Improve the gloss and whitening effect of coated paper.
Enhance water resistance: Suitable for surface sizing processes to enhance weather resistance and moisture resistance. 
Reduce production costs: Improve whiteness while reducing reliance on high-cost fillers. 

Application industries: 
Coated paper, White cardboard, High-end packaging paper, etc.
Surface sizing and coating whitening
Recommended products: Fluorescent brightener 4PL

Solution: 
Suitable for high-end packaging materials
Durable anti-yellowing: Enhance the light resistance of paper and prevent yellowing after long-term storage. 
Environmental protection and safety: Comply with food grade standards and can be applied to environmentally friendly packaging materials. 

Application industries: 
Coated paper, Specialty paper, High-end packaging paper, etc.
Whitening of specialty paper and packaging paper