A professional who controls grinders, mixers, and conveyors to prepare ingredients for plaster wallboard and feed prepared ingredients into hopper of board machine. Respnsibilities include:

• Transfers gypsum, flour, potash, soap, lime, and other materials from storage area to supply tanks, using handtruck or powered truck or conveyor.
• Dumps ingredients into agitator tanks according to formula to mix edge glue and soap solution.
• Feeds materials, in specified proportions, into machine hopper, by pump line and conveyor.
• Reads tank dials and flowmeters to determine reserve of materials in tanks and rate of flow of materials into machine hopper.
• Regulates feeders and pumps, using handtools, to ensure continuous supply of ingredients into hopper.
• May operate hydropulper to grind and mix paper into pulp slurry for use as additive.