Optical brightener 4BK suitable for: Cotton,Chinlon,viscose,T/C,T/R,Viscose,Wool,Silk. Optical brightener 4BK can be dissolved in warm water, And good compatibility with most chemical agents used in dyeing and finishing，optical brightener 4BK used in One-bath dyeing.
Shijiazhuang Taicang New Materials Co., Ltd. is a technology innovation and environmental protection enterprise integration of research, production and sales series of Optical Brightener and Chemical Auxiliary.
BA powder,optical brighteners in textiles,Fluorescent Brightener BBU,cotton fiber dyeing,whitening agent 127,Fluorescent Brightener Agent 199,Fluorescent dyestuff.
optical brightener 4BK
other name: optical brightener 113, fluorescent brightener 4BK, fluorescent whitener 4BK
This item optical brightener 4BK suitable for: Cotton、Chinlon、viscose、T/C、T/R、Viscose、Wool、Silk. optical brightener 4BK can be dissolved in warm water, And good compatibility with most chemical agents used in dyeing and finishing，optical brightener 4BK used in One-bath dyeing.
Physical characteristics | Fastness properties | ||
chemical onstruction | Stilbene derivative | H2O2 | Stable |
appearance | Light gray powder | reductant | Stable |
ionicity | Negative | chlorine | Unstable |
affinity | High | chlorate | Unstable |
fluorescent colors | Blue-violet light | PH scope | 6-11 |
solubility | 100 g/l @60℃ | ||
storage | 24 Month | ||
Fastness properties
Cotton、Viscose | Chinlon | Wool、Silk | ||
fastness to light | 3-4 | 3 | 2 | |
washing fastness | 40℃ | 5 | 5 | 5 |
60℃ | 5 | 5 | * | |
95℃ | 4-5 | * | * | |
chlorine fastness | 4 | * | * | |
perspiration fastness | Acidic | 5 | 4-5 | 4 |
Alkalinity | 5 | 4-5 | 4 | |
heat fastness | 180℃/30s210℃/30s | 5 | 4 | * |
dry cleaning fastness | 5 | 5 | 5 |
The above data in accordance with the ISO standard for testing
Application method | |||
Cotton、Cellulose | |||
dipping process | Padding process | ||
4BK | 0.1-0.3 % （o.w.f） | 4BK | 0.5-2 g/l |
H2O2（35%） | 8-14 ml/l | H2O2（35%） | 8-20 ml/l |
sodium hydroxid（100%） | 1-3 g/l | sodium hydroxid（100%） | 3 g/l |
scouring agent TC-QY90 | 2-4 g/l | scouring agent TC-QY90 | 2-4 g/l |
bath ratio | 1：5-10 | Fabric pad working liquid→steaming（100℃/50 minute）→wash | |
No bleach | 40-80℃/15-30 minute | ||
Add bleach | 95-80℃/30-60 minute | ||
Notes:
1. Do not use cationic additives. Because may cause conflict with anionic fluorescent whitening agent.
2. Water containing metal ions, such as: Cu、Fe、Mn、Zn，will affect the whitening effect of OBA. For this aspect, Can use metal ion chelating agent to remove in advance.
3. Do not exposed to the sun after dissolution.
4. optical brightener 4BK has good fastness to H2O2, so with H2O2 bleaching and fluorescent whitening treatment can be in the same dye bath.
5. optical brightener 4BK is a kind of fluorescent dyes with excellent whitening effect，Only use appropriate amount is enough to show whitening effect. If use too much will appear extinction phenomenon.
6. optical brightener 4BK dyeing speed is fast, dye uniformity and compatibility is good, so room temperature bath without additives can dyeing
7. If used in the dye bath containing sodium chlorite, will effect the whitening effect, so need to remove chlorine fully before use 4BK.
Packing method
In 25kg cardboard drum.
As A fluorescent whitener powder manufacturer, We Can Wholesale You Fluorescent Brightener Agent 199, Er Fluorescent Brightener Agent, Oba Mst. Fluorescent Powder Reactive Can Be Used For Textile Dyes. If You Need, Please Contact Us.
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