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Fluorescent Whitener Powder - China

price: 1.00 Dollar US$

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. other name: optical brightener 113, fluorescent brightener 4BK, fluorescent whitener 4BK
This item optical brightener 4BK suitable for: Cotton、Chinlon、viscos e、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.
More Product Please View Hifactory.


Company Contact:


  • Phone: 13603110786

  • Address: Zhengding County, Shijiazhuang City, Shijiazhuang City, Heibei, China

  • Email: Email


Published date: August 12, 2019 -

  • Business Description: 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. We established in 2000, located in Hebei province, nearby the Shijiazhuang airport, Beijing airport & Tianjin seaport. Through years of accumulation, we developed two production sites, many excellent staffs for production, research and sales.
    Company set up specialized research centers, professional testing equipment, engaged in new product development and the existing product process optimization, is committed to providing customers with continuous improvement of the best product value.
    2000: Shijiazhuang?Taicang?Chemical?Technology?Co.,?Ltd?was?established?in?2000?by?Mr.Zhang.?Our?company?locate?in?Shijiazhuang City,?Hebei?Province, nearby the Shijiazhuang airport, Beijing airport & Tianjin seaport. Main products: Optical Brightener Agent.
    2001: Factory set up specialized research centers, professional testing equipment.
    2003 Actively open up markets, especially northern part of China
    2006 Introduce new equipments & update technology for optical brightener
    2009 Domestic business covers northern part of China
    2014: Factory began to develop textile Auxiliary.
    2015: 30 excellent staff members for production, research and sales.
    2016: Asia is the most important market for Taicang Chemical currently. Meaning while, we have established close cooperation with clients from Brazil, Egypt, Mexico, America and so on.
    2017: We developed two production sites.
    2018: We have attended the "Dyestuff & Chemical Asia 2018" March 27-29th,2018, Karachi Expo Center, Pakistan. Our Booth Number was A48 of Hall 1.
    2019: Because of development needs, Officially renamed: Shijiazhuang Taicang New Materials Co., Ltd. Taicang New Materials will continue to provide high priority to products quality. Your 100% satisfaction is our endless pursuit!
    Please visit our website:https://www.taicangchem.com/

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