Jacquard Soda Ash Dye Fixer is a mild alkali that promotes the chemical reaction between Procion MX fiber reactive dyes and cellulose fiber. It is also known as sodium carbonate, washing soda or sal soda. Soda Ash is necessary to activate and set Procion MX dye, resulting in exceptionally brilliant color. This fixer allows you to experiment with a variety of applications including tie-dyeing, vat dyeing, batik, airbrush, hand painting, printing and spatter painting. Perfect for natural materials like cotton, rayon, linen, silk, wool, paper, reeds, and wood, this fixer is an essential companion for dyeing projects.DETAILS:WEIGHT:1 lb (454 g)PACKAGE CONTENT:Soda Ash Dye FixerMATERIAL:Sodium carbonateCOMPATIBILITY:Ideal for all natural materials such as cotton, rayon, linen, silk, wool, paper, reeds and wood.USE AND CARE:Dissolves in hot water