What is desizing?

Sizing is a process that is used during textile manufacturing to aid the weaving process. Size forms a coating on warp yards to help them to withstand tension during weaving and reduce breakage. Once this process is complete, the textile must go through a desizing process to remove this coating before bleaching or dyeing.

Previously, in order to remove the size, textiles were treated with acid, alkali or oxidizing agents, or soaked in large amounts of hot water. However, these methods were difficult to control and sometimes damaged or sometimes damaged the fibers or negatively impacted the subsequent dyeing. By using starch- degrading enzymes, amylases, starch-based size can be removed without damaging the fibers or negatively impacting the dyeing.

How can enzymes help?

Throughout textile manufacturing history, several different compounds have been used to size fabrics. Starch is the most common agent and has been used for more than 100 years. Starch-degrading enzymes work well for desizing fabrics because they can remove the coating without damaging the yarn.

In pre-treatment, Novozymes Aquazym® improves dyeing and fabric strength and cuts chemical and water consumption by removing starch-based sizes before dyeing.


Learn more about Aquazym®

Novozymes Aquazym® is an effective amylase for the complete removal of starch-based sizing agents in textile manufacturing processes. Since it only targets the starch, it does not negatively affect the cellulose as is the case with oxidative methods of desizing.

Novozymes Aquazym® benefits include

  • Effective solubilization and removal of starches
  • Available for all temperature and pH ranges
  • No aggressive chemicals needed, thus maintaining the fabric strength
  • Safe handling and operation
  • Improved wettability
  • Improved fabric quality
  • Reproducible performance and ease of use


Want to learn more about Aquazym®? Contact us below.

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