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Quick Details

  • Classification: Chemical Auxiliary Agent
  • CAS No.: 3809910000
  • Other Names: Fixing Agent
  • MF: Anionic
  • EINECS No.: 230-993-8
  • Purity: 99%
  • Place of Origin: Guangdong, China (Mainland)
  • Type: Chemical Auxiliary
  • Usage: Coating Auxiliary Agents, Textile Auxiliary Agents, Water Treatment Chemicals
  • Brand Name: LANGER
  • Model Number: NFR
  • Appearance: Dark brown liquid

Packaging & Delivery

Packaging Details 125kg/200kg per drum
Delivery Time 7-15 work days

Acidic Fixing Agent     NFR


1.Acidic Fixing Agent
2.increase the color fastness
3.Easy to use, don't have to adjust acidity
4.Excellent stability


Acidic Fixing Agent NFR is suitable for Nylon fabric. It's a new product in our company. 

The dye fixation effect of NFR even equal or better than the similar products of some foreign company. 

Further more, our price is cheaper than them. Suitable for polyamide fiber, wool, leather and other acid dyes fixing process. 

It can increase the color fastness of the dyed material obviously.


Typical Data


Synthetic tannic acid derivatives


Dark brown liquid

Ionization character



Soluble in water at any ratio

PH value (in 0.2% solution)



Resistant to acid, alkali, electrolytes and hard water



1.Greatly increased fastness to light, improved the wash and abrasion resistant of dyed fabric. 

2.Excellent stability

3.Little change on the fabric shade and hand feeling.

4.Easy to use, don't have to adjust acidity.

5.Almost no dye stuff stripping during the fixing process.

6.Can be dying and fixing at the same time, shorten the process.




Standard Usage

The suggested application amount for dipping process is 1-2% O.W.F of LA-NFR for pale shade, and 2-4% O.W.F for medium shade, 4-5% O.W.F of LA-NFR for deep shade, with liquor ratio 1:12-20 at 80°C for 20 minutes;

Process flows:

Pretreatment →Dyeing →washing →fixing →washing →drying.

One Bath Process

After fixing process, please using the standard usage to fixing by one bath process.


Packing & Storage

125 Kg in one plastic drum; can be stored for 6 months sealed in cool and dry place. 



All technical information quoted above is based on our experience, but it is only for reference of 

using this product and not given with guarantee and obligation. 

As the different application conditions of every factory, the user should make a trial before use. 

Then confirm the best technics suitable for you. 



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