The Benefits of Using a Sequestrant in Preparation and Dyeing Fiber Reactive Dyes

Calcium, magnesium and heavy metal ions can be found in hard water, peroxide stabilizers, electrolytes as well as the cotton yarn, fabrics and polyester/cotton blends.

The use of a non-foaming sequestrant in preparation and dyeing will improve water absorbency and softness of the fabric. Also, improves winding properties of cotton yarn as well as eliminate precipitation problems found in dyeing.

Reactive Dye Systems prevents issues with:

  • Solubility
  • Dye deposition
  • Unlevelness
  • Fixation efficiency in certain red dyes
  • Shade reproducibility and shade change cause by trace amounts metal ions
  • Fastness
  • Enhances brightness of dyeing
  • Prevents build-up of scale in machinery

The sequestrant used must not have a de-metalizing effect with metal containing reactive dyes such as Reactive Blue 21.

First Source Worldwide, LLC recommends Sora Quest CM-MI.

Application Process

Preparation: Exhaust Dyeing

Pre-scouring or bleaching:  1.0 g/l


  • In the dye make up tank: 1.0 g/l
  • Filling the machine: 1.0 g/l
  • Final Rinse: 0.5 g/l
  • Continuous processes: 5-10 g/l

If you have further questions, either need a sample, Technical Data Sheet, SDS or Technical Assistance, please click the picture below.

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By |October 30th, 2020|Blog|0 Comments

About the Author:

Ed Tessener is Director of Textile Sales and Marketing at First Source Worldwide. A lifetime in the textile and color industry, he’s become a master in the field. His superior eye for detail and hospitable approach to service makes him a reliable source for textile process troubleshooting. At the end of long day of R&D, nothing beats a glass of wine with his pooch on his lap.