Soda Ash - Sodium Carbonate - Washing Soda - Soda Glass - Soda Ash Fixer
Fiber reactive dyes used on cellulose fibers needs to be "fixed" to the fiber. Soda ash is a mild alkali that allows this reaction to occur. Enough soda ash should be used to get a PH of around 10.5 or all the dye will not adhere to the fiber.
Care should be used when using on silk as too much may damage the fabric.
Soda ash is also suitable for use as a ceramic Glaze, Glass making, toothpaste, water softener, washing soda and tie dye.