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Hubei Zezhuang Technology Industrial Development Co., Ltd. is professionalChina Color Fastness Improving Auxiliary for Acid Dye Manufacturers and Wholesale Color Fastness Improving Auxiliary for Acid Dye OEM/ODM Suppliers, established in 2011 as Shanghai Zezhuang Industrial Co., Ltd., is located in Fengjing Town, Jinshan, known as the "crossroads of Wu and Yue" and often referred to as "three steps and two bridges". It is a high-tech enterprise specializing in the research, development, production, and sales of textile dyeing and finishing auxiliaries. The company's products cover the entire process of various technological chains, including textile printing and dyeing, coating, lamination, calendering, setting, washing, printing, and bronzing. The company boasts independent R&D, testing, and after-sales centers. It has established long-term cooperation mechanisms with Wuhan Textile University, Guangdong Wuyi University, Hunan University of Engineering, and other institutions.
The company employs two Ph.D. holders in chemistry, eight master's degree holders, and twenty-three bachelor's degree holders. Currently, the company has its marketing headquarters in Suzhou, Jiangsu (Suzhou Zezhuang New Material Co., Ltd.), a production base in Hangzhou, Zhejiang, and sales offices in Zhejiang, Hubei, Guangdong, Fujian, Shandong, and other places. Zhejiang Yongshuo Import and Export Co., Ltd., as the foreign trade company of Zezhuang Industry, focuses on expanding overseas markets. In 2023, the company established a new production base in Jingzhou, Hubei, and founded Hubei Zezhuang Technology Co., Ltd., covering an area of 60 acres with a total investment of 380 million yuan.
We will strengthen our industrial layout, increase R&D investment, and commit to the development and promotion of green and environmentally friendly products that are low-pollution, high-performance, multifunctional, and high-value-added. Guided by the concept of green and environmentally friendly development, we aim to achieve high-quality and sustainable development for our enterprise, and provide a safe, comfortable, and beautiful living environment for society.
Specification
| Item | Typical Value |
| Appearance | Liquid, pale to light yellow |
| Ionicity | Cationic / weakly cationic |
| pH (1% solution) | 4.0 - 7.0 |
| Active content | 20% - 40% |
| Dosage | 1 - 4 g/L depending on dye class |
| Temperature | 40 - 80 C depending on process |
| pH stability | Stable in weakly acidic to neutral bath |
| Solubility | Easy to dilute with water |
| Compatibility | Compatible with common acid dyeing and softening auxiliaries |
| Formaldehyde | Formaldehyde-free grades available |
| Shelf life | 12 months in sealed drum |
| Storage | Store in cool, dry place, avoid direct sunlight |
| Packing | 120 kg drum, 1000 kg IBC, custom packing available |
Values are typical and vary by fiber, dye class and process. TDS and sample are available on request.
Application
- Nylon and polyamide fabric
- Wool and wool blend fabric
- Silk and silk blend fabric
- Cashmere and protein fiber
- Knitwear and scarf fabric
- Exhaust dyeing and jet dyeing machines
- Acid dyeing processes
- Programs that specify wash fastness and light fastness
It can be used in exhaust dyeing and jet dyeing machines, and can be combined with softening and color protection agents in one bath. For mills running multiple acid dye programs, one product can cover several fixing steps.
Advantage
- Fixes acid dye on fiber surface and reduces dye migration during washing
- Applicable to nylon, wool, silk, cashmere and protein fiber blends
- Formaldehyde-free grades available
- Maintains shade depth on acid-dyed fabric
- Runs in exhaust dyeing and jet dyeing machines
- Compatible with common acid dyeing and softening auxiliaries
- Used in apparel, knitwear and luxury textile programs
- Supported by a manufacturer with long-term textile auxiliary experience and university research cooperation
- Export-ready supply and technical support for overseas buyers
For mills that need to meet color fastness on acid-dyed fabric, this grade reduces color loss during washing and helps maintain shade depth.
Payment & Shipping
- Payment: T/T, L/C at sight, and terms for repeat orders
- Packing: 120 kg drum, 1000 kg IBC, or custom packing
- Lead time: 7 - 15 days after order confirmation
- Shipping: sea, air and express for samples
- Sample: free sample for evaluation, freight collected
- Export support: documentation and shipping coordination for overseas buyers
- MOQ: flexible for trial orders and repeat programs
- Port: main China ports, can be arranged by buyer preference
Flexible terms can be discussed for repeat and long-term programs. If you need help with documentation or shipping arrangements, our export team can support the process.
- Q: What does color fastness improving auxiliary for acid dye do?
- A: It fixes acid dye on the fiber surface and reduces dye migration during washing, which helps maintain shade depth.
- Q: Which fibers are suitable?
- A: It is used on nylon, wool, silk, cashmere and protein fiber blends.
- Q: Do you have formaldehyde-free grades?
- A: Yes. Formaldehyde-free grades are available.
- Q: What is the recommended dosage?
- A: Typically 1 - 4 g/L depending on dye class. The exact dosage depends on fiber and target fastness.
- Q: What temperature is recommended?
- A: Typically 40 - 80 C depending on process.
- Q: Can it be combined with softening agents?
- A: Yes. It is compatible with common acid dyeing and softening auxiliaries in one bath.
- Q: Can you share fastness test data?
- A: Yes. TDS and test data can be provided for evaluation.
- Q: Do you support technical adjustment for our process?
- A: Yes. Technical support is available on request.
- Q: What is the MOQ and lead time?
- A: MOQ is flexible for trial orders, and lead time is typically 7 - 15 days after order confirmation.
Oct 12 , 2026 
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