Soda Ash

When tie-dying, soda ash is used to help adhere the dye onto the fabric. Soda ash lessens the chances of the dye fading once it is set. It is suggested to use soda ash when tie-dying to have brighter colors. Sometimes referred to as washing soda, do not get it confused with baking soda as baking soda will dilute the color of the dye. You can find soda ash at JOANN Fabrics, Walmart, Hobby Lobby, and other stores that sell craft supplies