About Us

At Wenzhou Blue Dolphin New Material Co., Ltd., we specialize in the research, development and manufacturing of high-performance optical brighteners for detergents, plastics, textiles, papermaking, paints, coatings and inks industries.
We go beyond manufacturing optical brighteners. We help customers select the right solutions for their formulations, improve whiteness and visual appearance, optimize production efficiency, minimize yellowing, reduce formulation costs and ensure consistent manufacturing performance.
Every application presents unique technical challenges. Alongside our standard product portfolio, we provide customized optical brightener solutions tailored to specific formulations, production processes and performance requirements. Whether refining an existing formulation or developing a new product, we work closely with customers to deliver practical, application-driven solutions.
Combining product expertise, application knowledge and responsive technical support, we are committed to helping manufacturers, formulators and distributors create higher-value products and strengthen their long-term competitive advantages.
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Hot Products

  • Optical Brightener 4BK | Fluorescent Whitening Agent for Cotton, Textile and Paper cas 12768-91-1

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  • Optical Brightener BBU for Paper and Textile | C.I. Fluorescent Brightener 220 | CAS No. 16470-24-9

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  • Optical Brightener KSB for Plastics and EVA Foam | C.I. Fluorescent Brightener 369

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  • Optical Brightener VBL C.I. Fluorescent Brightener 85 | CAS No. 12224-06-5

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  • Optical Brightener CXT for Detergents and Textiles C.I. Fluorescent Brightener 71, Fluorescent Brightener 260 | CAS No. 16090-02-1

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Our Advantages

What sets us apart from our competitors is our commitment to customer satisfaction. Our biggest selling points are our reliability, consistency and client-centric approach. We have built a reputation for delivering the highest quality products on time and at competitive prices. Additionally, we believe in building long-term relationships with our clients because we know mutual trust and collaboration are critical to success.

Wen Zhou Blue Dolphin New Material Optical Brightener Solutions

New Products

  • Optical Brightener ER-I for Polyester & Plastics | C.I. Fluorescent Brightener 199 | CAS No. 13001-39-3

    Optical Brightener ER-I for Polyester & Pl...

    Key Features Suitable for Polyester Fibers Optical Brightener ER-I is particularly suitable for the fluorescent whitening and brightening of polyester fibers and related polyester materials. Suitable for Plastic Applications ER-I can also be used in compatible plastic systems, including polyethylene (PE) and polypropylene (PP), where improved whiteness and brightness are required. Effective Optical Brightening ER-I helps compensate for unwanted yellowish tones through blue-violet fluorescenc...

  • Optical Brightener CBS-X for Detergents | C.I. Fluorescent Brightener 351 | CAS No. 27344-41-8

    Optical Brightener CBS-X for Detergents | C.I. ...

    Key Features Good Water Solubility CBS-X is suitable for aqueous detergent systems and can be incorporated into both powder and liquid detergent formulations. Effective Fabric Whitening CBS-X helps improve the perceived whiteness and brightness of washed fabrics by compensating for unwanted yellowish tones through fluorescence. Suitable for Different Detergent Formats CBS-X can be used in laundry powders, liquid detergents, detergent bars and other laundry care formulations. Performance Acros...

  • Optical Brightener BBU for Paper & Textiles | C.I. Fluorescent Brightener 220 | CAS No. 16470-24-9

    Optical Brightener BBU for Paper & Textile...

      Key Features   Good Water Solubility   Optical Brightener BBU has good water solubility, making it suitable for compatible aqueous papermaking and textile processing systems.   Suitable for Papermaking Applications   BBU can be used in different papermaking processes, including paper pulp, surface sizing and paper coating, where improved optical whiteness and brightness are required.   Suitable for Cellulosic Textiles   BBU is suitable for the fluorescent ...

  • Fluorescent Brightener 135 cas1041-00-5

    Fluorescent Brightener 135 cas1041-00-5

    fluorescent whitening agent 135 is a bright yellow powder, easily soluble in organic solvents, but insoluble in water. It has a high melting point and good thermal stability, ensuring its effectiveness in various processing techniques.  High Brightness and Whiteness Efficiency: Our chemical optical brightener 135 provides excellent brightness and whiteness improvement, making it an excellent choice for products requiring a vibrant and attractive appearance. The enhanced brightness effect is l...

  • Optical Brightener 378/ FP-127cas40470-68-6

    Optical Brightener 378/ FP-127cas40470-68-6

     Application Areas - Textiles: The Optical Brightener 378 can be easily applied to cotton, polyester, and other synthetic fabrics to enhance the appearance of finished textile products. - Plastics: This brightening agent is widely used in the plastics industry, where it helps improve the visual appeal of plastic materials and products. - Detergents: Optical Brightener 378 is an essential ingredient in laundry detergents, as it significantly boosts the brightness and whiteness of clothes.   Be...

  • Optical Brightener OB-2 cas2397-00-4

    Optical Brightener OB-2 cas2397-00-4

    OB-2 CAS 2397-00-4 offers several advantages  Excellent whitening effect: improve the whiteness and brightness of the material and enhance its visual appeal.  Enhanced Color Correction: Masks unwanted yellow tones, producing vivid, true-to-life colors.  UV Protection: Absorbs and neutralizes harmful UV radiation, preventing material degradation and maintaining its quality.  Wide range of applications: It is suitable for various materials such as plastics, textiles, paints, inks, etc., and has...

  • optical brightener KSNcas5242-49-9

    optical brightener KSNcas5242-49-9

    Physical properties - Appearance: white crystalline powder - Melting point: 198-202°C - Content: ≥ 99.5% - Moisture: ≤0.5% - Ash content: ≤0.1%   application  KSNcas5242-49-9 has a wide range of applications, including but not limited to - Textiles: Enhances the whiteness and brightness of fabrics, making them more visually appealing. - Paper: Improves the brightness and reflective properties of paper, resulting in vibrant prints and superior aesthetics. - Detergent: Adding KSNcas5242-49-9 to...

  • Optical Brightener ER-II  cas13001-38-2

    Optical Brightener ER-II cas13001-38-2

    ER-II cas 13001-38-2 is a highly versatile and stable optical brightener compatible with a wide variety of materials. It can be easily incorporated into various processes such as dyeing, printing and coating without compromising the integrity of the product. With its excellent stability and compatibility, it ensures long-lasting brightness and durability of the final product. One of the main advantages of ER-II cas 13001-38-2 is its excellent whitening effect. It effectively masks unwanted ye...

  • optical brightener 367/Optical Brightener KCBcas5089-22-5

    optical brightener 367/Optical Brightener KCBca...

     Excellent whitening performance: The chemical optical brightener 367cas5089-22-5 shows impeccable performance in improving color brightness and whiteness, effectively eliminating any unwanted yellowing or dullness. The result is products that effortlessly catch the eye and engage consumers.  Wide applicability: Our optical brighteners can be effectively applied to a variety of materials, including fabrics, plastics, paper and detergents. This versatility makes it a truly valuable solution fo...

  • Fluorescent brightener 185/EBF cas12224-41-8

    Fluorescent brightener 185/EBF cas12224-41-8

    optical brighteners, EBF, have several remarkable properties that make them ideal for a wide variety of applications. First of all, it has excellent light fastness, which ensures long-lasting whiteness and brightness of the treated material. Second, it has high affinity for different materials, is easy to apply and is compatible with various substrates. In addition, the chemical optical brightener EBF has excellent thermal stability, making it suitable for processes involving high temperature...

  • Optical Brightener 135  cas1041-00-5

    Optical Brightener 135 cas1041-00-5

    optical brightener 135 comes in the form of a white or light yellow crystalline powder, ensuring easy handling and integration into various manufacturing processes. Its high heat resistance and excellent stability make it suitable for processing at high temperatures, resulting in uniform dispersion throughout the product. This optical brightener is compatible with a wide variety of materials, including cellulosic fibers, synthetic fibers, plastics, coatings, and more. It can be applied during...

  • Fluorescent Brightener 113/BA cas12768-92-2

    Fluorescent Brightener 113/BA cas12768-92-2

    Optical Brightener 113 has been carefully formulated to provide high efficiency and reliable performance. This multifunctional compound exhibits excellent stability and excellent compatibility with various substrates. It is suitable for a wide range of industrial applications including detergents, laundry products, printing inks, coatings and fibers. Known for its superior whitening properties, this optical brightener effectively reduces yellowing and discoloration of products over time. It h...

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