A professional who operates blunger (mixing machine) and auxiliary equipment to blend and mix clay into semiliquid for use in casting ceramic ware. Respnsibilities include:

• Dumps sacks of clay into conveyor to charge blunger.
• Turns valve to admit water into blunger.
• Starts blunger that mixes clay into semiliquid.
• Stops blunger and places hydrometer in semiliquid to determine specific gravity.
• Adds water or clay to obtain mixture of specific gravity.
• Regulates valves to discharge mixture over screens, agitators, and magnets to remove iron or steel in mixture.
• Removes excess water from mixture with vacuum filter.
• Washes screens and magnets to remove foreign particles and sludge, using hose.
• May mix clays according to formula.