Pre-dyeing agents, also known as pre-treatment chemicals, play a crucial role in preparing textiles for the dyeing process. These agents are applied to the fabric before dyeing to remove impurities, enhance dye uptake, and ensure uniform coloration. The pre-dyeing process is essential for achieving vibrant and consistent colors in dyed textiles.

Common pre-dyeing agents include scouring agents, which remove natural impurities and prepare the fabric for subsequent treatments, and bleaching agents, which eliminate color and undesirable impurities. Additionally, sequestrants may be used to control metal ions that can interfere with the dyeing process.

The effectiveness of pre-dyeing agents significantly influences the final color, shade, and quality of dyed textiles. Proper pre-treatment ensures that the fabric is receptive to dyes, leading to improved color fastness and a more appealing aesthetic in the finished product.