Achieving optimal whiteness and brightness with optical brighteners is a science that requires careful consideration of application methods and dosages. Optical Brightener 31 (CAS: 12224-16-7) is a highly effective fluorescent whitening agent widely used in the textile and paper industries. As a reputable manufacturer and supplier, NINGBO INNO PHARMCHEM CO.,LTD. provides guidance to help you maximize the benefits of this versatile chemical.

Understanding Application Methods

The effectiveness of Optical Brightener 31 depends significantly on how it is applied. Common methods include:

  • Textile Application: In textile processing, OBAs are typically applied during dyeing or finishing stages. This can involve incorporating the brightener into the dyebath or a separate finishing bath. The key is ensuring even distribution and adequate contact time for the brightener to affix to the fibers. For cellulose fibers, application often occurs under neutral or slightly alkaline conditions.
  • Paper Application: For paper manufacturing, Optical Brightener 31 can be added at various stages, including the wet end of the papermaking process (added to the pulp slurry) or in surface sizing and coating applications. Wet-end application allows for better penetration, while surface application can provide a more brilliant and uniform finish.

Determining Optimal Dosage

The correct dosage of Optical Brightener 31 is critical for achieving the desired whitening effect without over-application, which can lead to dullness or a yellowish tint. Recommended concentrations vary depending on:

  • Substrate Type: Different materials have varying degrees of natural yellowness and affinity for OBAs.
  • Processing Conditions: Factors like temperature, pH, and presence of other chemicals in the formulation can influence optimal dosage.
  • Desired Level of Whiteness: Higher concentrations generally lead to greater brightness, up to a saturation point.
  • Light Source: The perceived whiteness can vary under different lighting conditions (e.g., daylight vs. fluorescent light).

General guidelines suggest low concentrations, often in the parts per million (ppm) range for paper and a few percent for textiles, but specific recommendations should always be based on laboratory trials and the supplier's technical data. As a trusted optical brightener for paper manufacturer and supplier, we can provide tailored dosage recommendations.

Tips for Effective Use

  • Pre-treatment: For optimal results, especially in textiles, ensure materials are properly scoured and bleached to remove natural impurities and yellowing before OBA application.
  • Even Distribution: Ensure thorough mixing of the OBA in the application medium to prevent streaking or uneven brightening.
  • pH Control: Maintain the recommended pH range for OBA stability and efficacy.
  • Lightfastness: While generally good, consider the UV exposure the final product will receive. Some applications may benefit from UV stabilizers.

When you need to buy optical brightener 31 supplier or seek reliable fluorescent brightener 12224-16-7 price, remember that effective application is as important as product quality. NINGBO INNO PHARMCHEM CO.,LTD. is here to support your manufacturing processes with high-quality products and expert advice. Contact us to ensure you are using Optical Brightener 31 to its fullest potential.