As a leading company dedicated to the textile printing and dyeing industry, we have always been committed to developing more efficient and advanced products to meet the demands of the market and our customers. We are proud to announce a breakthrough in the application of our latest research and development, the Fluorescent Whitening Agent 4BK, on cotton fabrics, offering unprecedented whiteness enhancement in strong alkaline environments.

Innovative Solution for Enhanced Whiteness

Throughout our research and development process, we gained a deep understanding of the market's demand for whiteness boosters and recognized the limitations of traditional brightening agents in strong alkaline conditions. To overcome this challenge, our team has tirelessly worked to develop a superior blue dye that is incorporated into the Fluorescent Whitening Agent 4BK.

Our novel Fluorescent Whitening Agent 4BK demonstrates outstanding performance in enhancing whiteness in strong alkaline environments, surpassing the commonly used KISCO in terms of brightness. This achievement is attributed to our developed blue dye, which interacts with the characteristics of cotton fibers, optimizing the fluorescent effect and making the fabric surface appear brighter and whiter. Our product showcases incredible capabilities in improving the overall whiteness of cotton fabrics.

Characteristics of Fluorescent Whitening Agent 4BK

In addition to remarkable whiteness enhancement, our Fluorescent Whitening Agent 4BK possesses other important features. Firstly, it exhibits excellent stability, maintaining its superior performance under high temperatures, high humidity, and multiple washes. 

Secondly, our product is non-toxic and environmentally friendly, complying with international standards and regulations. 

This makes our Fluorescent Whitening Agent 4BK an ideal choice to meet the modern consumer demand for eco-friendly products.

We firmly believe that the application of Fluorescent Whitening Agent 4BK will bring tremendous benefits to textile printing and dyeing factories. It will enhance the quality and appearance of cotton fabrics, increase product value, and fulfill customers' requirements for high whiteness fabrics. Meanwhile, our innovative product provides a competitive advantage for textile printing and dyeing factories, helping them stand out in the market.

As a textile printing and dyeing factory, you can confidently choose our Fluorescent Whitening Agent 4BK. We will provide professional technical support and comprehensive after-sales service to ensure that you achieve the best results and utmost satisfaction in your application process.

The following is the comparation Raytop 4BK with Kisco,kindly pls check.

Features

Fluorescent whitening agent 4BK is suitable for whitening cotton and blended fabrics. It has strong fluorescence, positive shade, high whiteness, and good resistance to weak acids, alkalis, perborate, hydrogen peroxide, etc.

Fluorescent whitening agent 4BK has very good solubility and dispersibility.

The solubility of fluorescent whitening agent 4BK in water is higher than that of whitening agent VBL and 31#, and it can be used as a suspension of about 10% with hot water. When made into a solution, it should be used as it is prepared, and the solution should avoid direct sunlight.

Usage and Dosage

When using optical brightener 4BK for bleaching and brightening on cotton, the following is the usage and dosage guide compiled according to the information you provided, in order to be more professional:

1.Bleach cloth whitening (padding whitening):

• Fluorescent whitening agent 4BK dosage: 0.05% to 0.6% (by cotton weight)

• Dosage of Yuanming powder: 5g to 20g/L

• Bath ratio: 1:10 to 1:30 (ratio of cloth weight to bath liquid volume)

• Dyeing temperature: 80°C to 100°C

• Warm time: 20 minutes to 30 minutes

2.Oxygen bleaching one bath:

• Fluorescent whitening agent 4BK dosage: 0.05% to 0.6% (by cotton weight)

• Hydrogen peroxide (H2O2) dosage: 10 g/L

• NaOH dosage: 1 g/L

• NaSiO3 dosage: 2.5 g/L

• Detergent dosage: 1 g/L

• Bath ratio: 1:10 to 1:30 (ratio of cloth weight to bath liquid volume)

• Dyeing temperature: 90°C to 100°C

The accuracy and applicability of the method of use and dosage may vary due to actual application conditions and the characteristics of different products. Therefore, always follow these professional guidelines when using optical brightener 4BK:

Please read and follow the instructions and safety guidelines of the product you are using carefully.

Before the actual operation, conduct a small sample test to ensure that the selected dosage and process meet the expected whitening effect.

Consider cotton fabric type, process flow and other chemical compatibility to determine optimal application and dosage.

If necessary, consult a professional printing and dyeing technician or the supplier's technical support department for more specific and accurate advice.

Please remember that when using chemicals in the printing and dyeing industry, make sure to follow the correct safety operating procedures and always follow the relevant regulations and requirements to ensure the safety of the working environment and the quality of the products.

Performance advantages

Fluorescent whitening agent 4BK is most suitable for pure cotton. It gives full play to the characteristics of the auxiliary agent, so that the dyed material has a bright shade and a very good visual effect. It is suitable for some high-demand printing and dyeing requirements (especially exported to European and American countries)

Packaging and storage

1. 25kg cardboard drum lined with plastic bags, also can be packed according to user's requirements.

2. This product is a non-dangerous product with stable chemical properties and can be transported by any means.

3. Store in a cool, dry place away from light.