Optical Brightener Agant 4BK For Printing and Dyeing

Short Description:

Physical characteristics Fastness properties 　　　　　　　 chemical onstruction : Stilbene derivative 　H2O2 : Stable appearance : Light yellow 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 F...

Optical Brightener Agant 4BK For Printing and Dyeing: This item suitable for: Cotton、Chinlon、viscose、T/C、T/R、Viscose、Wool、Silk. It can be dissolved in warm water, And good compatibility with most chemical agents used in dyeing and finishing，used in One-bath dyeing.

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Product Detail

Product Tags

Physical characteristics		Fastness properties
chemical onstruction	: Stilbene derivative	H₂O₂	: Stable
appearance	: Light yellow 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℃/30s 210℃/30s	5	4	*
dry cleaning fastness		5	5	5

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

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. 4BK has good fastness to H2O2,so with H2O2 bleaching and fluorescent whitening treatment can be in the same dye bath。

5. 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. Its 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.

Our factory and production workshops of Jinan Credit Chemicals

Our wharehouse and big stock of optical brightener powders