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Optical brightener chemical name is fluorescent or optical brightening agents, are chemical compounds used in various industries, including textiles, detergents, and paper, to improve the brightness and appearance of materials. These brighteners work by absorbing invisible ultraviolet light and converting it into visible blue light, which enhances the whiteness and brightness of the material, making it appear cleaner and more vibrant. Optical brighteners are commonly added to laundry detergents to make clothes appear whiter and brighter after washing. In the textile industry, they enhance the brilliance of fabrics, while in the paper industry, they improve the whiteness of papers and other printing materials.

It is essential to note that optical brighteners do not remove stains or dirt; they only provide a visual effect to improve the overall appearance of the fabric. 

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Optical Brighter

Optical brighteners in
laundry detergent

Optical brighteners in laundry detergent are additives that help enhance the clothes’ appearance by making them whiter and brighter. These compounds work by absorbing ultraviolet light and converting it into visible blue light, which offsets the yellowish or dull appearance of fabrics. When added to laundry detergent, optical brighteners remain on the surface of the washed clothes, reflecting light and giving the illusion of cleaner and fresher garments.

As a result, using optical brighteners in laundry detergent is a cosmetic solution to make clothes look cleaner and brighter without affecting the actual cleanliness or performance of the detergent in stain removal.

Optical brighteners chemistry

The chemistry of optical brightening agents (OBAs) involves a fascinating process that enhances the appearance of materials by absorbing ultraviolet light and re-emitting it as visible blue light. OBAs are organic compounds that possess conjugated double bonds, allowing them to absorb UV light. When textiles or papers treated with OBAs are exposed to UV light, the absorbed energy triggers fluorescence, emitting blue light that complements the yellowish tint of aged materials. This phenomenon tricks the human eye into perceiving the material as brighter and whiter. Optical brightening agents are widely used in industries such as textiles, paper, and detergents to enhance the visual appeal of various products.

Optical brighteners in textiles Industry

OBAs are extensively used in the textile industry to enhance the brightness and whiteness of fabrics and garments. They are added to laundry detergents, fabric softeners, and boosters to make optical brightener for cotton to appear brighter and fresher.

Paper Industry

In the paper industry, OBAs improve the brightness and optical properties of paper products such as copier paper, printing paper, and packaging materials. Optical brightening agent for paper help to achieve a more vibrant appearance and make the paper appear whiter.

Detergent Industry

Optical brightening agents are a common ingredient in laundry detergents and washing powders. Optical brightener manufacturers work by absorbing UV light from the environment and emitting visible blue light, thus making fabrics appear brighter, even in lower light conditions.

LEUCOPHOR S.A, BSB, BBU, DMX-S:

Optical brighteners, optical brightening agents (OBAs), fluorescent brightening agents (FBAs), or fluorescent whitening agents (FWAs) are chemical compounds that absorb light in the ultraviolet and violet regions.

These additives are often used to enhance the appearance of the color of fabric and paper, causing a “whitening” effect.

Optical brighteners S.A, BBU, BBU Liquid, BSB, DMX-S are acid-resistive & perform well in acidic media. While using with hydrogen peroxide as a bleaching agent it gives very impressive results. They can be applied by padding or a continuous process.

Leucophor® Optical Brightening Agents

Leucophor® OBAs are specialized chemical formulations developed for use in the paper and textile industries. These agents are primarily used to improve the whiteness and brightness of products, ensuring they meet high-quality standards and consumer expectations.

🔬 Key Features

  • High Whiteness and Brightness: Leucophor® OBAs are designed to impart superior whiteness and brightness to paper and textile products, enhancing their visual appeal.
  • Urea-Free Formulations: Many Leucophor® products are urea-free, reducing the risk of ammonia odors and improving environmental safety during production.
  • Environmental Compliance: These agents are formulated to meet stringent environmental standards, being free from substances like benzophenone, bisphenol A, and phthalates.
  • Versatility in Application: Leucophor® OBAs can be applied in various stages of paper and textile processing, including stock application, size press, and coating formulations.
  • Compatibility with Binders: They demonstrate excellent compatibility with common binders such as polyvinyl alcohol (PVOH), carboxymethyl cellulose (CMC), and casein, ensuring effective performance across different formulations.
 

🧪 Product Variants

Leucophor® offers a diverse range of OBAs, each tailored for specific applications and requirements:

  • Leucophor® SAC Liquid: A high-white, urea-free hexasulphonated optical brightener suitable for use in both coating slips and sizing solutions. It is compatible with most anionic and nonionic products, offering versatility in the paper and textile industries.
  • Leucophor® AFCN Liquid: An FDA-approved optical brightener designed for food-contact paper and paperboard applications. It is ideal for stock application and coating formulations containing PVOH, CMC, or casein as secondary binders.
  • Leucophor® MT Liquid: A cost-effective tetrasulfonated optical brightening agent modified to deliver high whiteness performance in surface applications, especially at the size press.
  • Leucophor® T-100 Liquid: A urea-free, solvent-free fluorescent whitening agent suitable for wet-end applications and size press applications in paper production under neutral to alkaline conditions.
  • Leucophor® U Liquid: A neutral-shade tetrasulphonated optical brightener offering good light fastness and wide pH range compatibility, making it suitable for pulp bleaching and paperboard applications.
 

🌍 Applications

Leucophor® OBAs are widely used in various applications:

  • Paper Industry: Enhancing the whiteness and brightness of printing paper, writing paper, and packaging materials.
  • Textile Industry: Improving the visual appeal of fabrics and garments by imparting superior whiteness.
  • Food Packaging: Particularly the Leucophor® AFCN variant, which is FDA-approved for use in food-contact paper and paperboard, ensuring safety and compliance.
 

Benefits

  • Enhanced Product Quality: Achieves superior whiteness and brightness, meeting high-quality standards.
  • Environmental Safety: Formulated to be free from harmful substances, ensuring safer production processes.
  • Operational Efficiency: Compatible with various binders and processing stages, offering flexibility in production.
  • Regulatory Compliance: Particularly the AFCN variant, which complies with FDA regulations for food-contact materials.

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