Preparing a Fiber Reactive Dye Bath You must first complete Scouring or Washing the Fiber-Fiber Reactive Dyes before viewing this LessonPlease sign up for the course before starting the lesson. Scouring or Washing the Fiber-Fiber Reactive Dyes Adding Procion MX Dye Powder and Material to the Dye Bath Back to: Dirty Dye with Fiber Reactive Dyes > Dye Bath