Why do alkali spots appear during the dyeing process?

The main reason: the alkaline spot is not clean or uniform after pre-treatment (such as bleaching, light treatment). "The pre-treatment process must be strengthened to remove alkali.

Cause

Ensure the quality of semi-products before dyeing

Use soft water to prepare dye solution and dye

Prevent the semi-product from dripping with water before dyeing

Strictly prevent iron rust spots

Strictly control the number of products in progress to avoid stains during transportation

Pay attention to the chemical material operation to ensure that the dye is fully dissolved

Try to eliminate the interference of heavy metal ions

Do a good job of cleaning equipment