optical brightener 4BK

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.

fluorescent brightener powder

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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