A professional who tends one or more tumbling vats that dye felt hat bodies. Respnsibilities include:

• Dumps hat bodies into perforated tumbler.
• Pours premixed dye powder into vat and turns valves to admit water and steam to fill and heat vat.
• Starts tumbler revolving to saturate hat bodies with dye.
• Adds prescribed chemicals to solution to increase penetration and permanency of dye.
• Removes dyed articles after specified time.