Soda Ash, PRO Dye Activator or Washing Soda are three names for the same thing – Sodium Carbonate. Soda Ash is used as an alkali fixative for Procion Fiber Reactive Dyes, and as an auxiliary for your pre-reduced indigo vat. It can also be used with Synthrapol as a pre-scour for wool.

Please note: Products are filled by weight, not volume. Due to plastic shortages, jars, lids and bags may vary.