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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