Fluorescent Brightener 4BK | 12768-91-1
Product Description
Fluorescent Brightener 4BK is a fluorescent brightening agent for stilbene, with a blue-violet fluorescent colour. Compared to VBL, it has better water solubility, light resistance, acid and alkali resistance and higher whiteness at the same dosage. It is particularly suitable for the whitening and brightening of high-grade paper and cotton fabrics.
Other Names: Fluorescent Whitening Agent, Optical Brightening Agent, Optical Brightener, Fluorescent Brightener, Fluorescent Brightening Agent.
Applicable industries
It is suitable for the whitening of cotton and polyester-cotton blended fabrics, and the whitening of cotton blended fabrics.
Product Details
|
C.I. |
87 |
|
CAS NO. |
12768-91-1 |
|
Molecular Formula |
C40H40N12Na4O16S4 |
|
Content |
≥ 99% |
|
Appearance |
Light green powder |
|
Fluorescence intensity |
100 |
|
Moisture |
≤ 5% |
|
Fineness |
≤ 5% |
|
Colored Light |
Blue-violet light |
|
Application |
For use on cotton and viscose fabrics. Particularly suitable for the whitening of high whiteness cotton fabrics |
Performance characteristics
1.It has a good fluorescent whitening effect, strong whiteness enhancing power, bright and vivid colour.
2.Insensitive to light, chemical properties are more stable.
3.It is resistant to weak acids, alkalis, hydrogen peroxide and perborates, and is suitable for alkali-oxygen-bath processing and also for rolling and dyeing processes.
4.It has good washing resistance.
Method of Application
1.Dip-dyeing and absorbing method:
Dosage: 0.1%-0.8% (o.w.f); Bath ratio: 1:10-30; Dyeing temperature: 95-100 degrees; Holding time: 30-40 minutes.
2.Boiling and oxygen bleaching whitening-bath method:
Dosage: 0.25-0.8% (o.w.f); Hydrogen Peroxide (30%): 5-15g/L; Refining agent SH-A: 3-5g/L; Bath ratio: 1:10-30; Dyeing temperature: 95-100 degrees; Holding time: 30-40 minutes; Washing and drying.
Product Advantage
1.Stable Quality
All products have reached national standards, product purity of more than 99%, high stability, good weatherability, migration resistance.
2.Factory Direct Supply
Plastic State has 2 production bases, which can guarantee the stable supply of products, factory direct sales.
3.Export Quality
Based on domestic and global, the products are exported to more than 50 countries and regions in Germany, France, Russia, Egypt, Argentina and Japan.
4.After-sales Services
24-hour online service, the technical engineer handles the whole process regardless of any problems during the use of the product.
Packaging
In 25kg drums (cardboard drums), lined with plastic bags or according to customer’s requirements.
