A professional who tends mixing machine or mulling mill that mixes lead oxide powders, water, and acid into paste for storage-battery grids. Respnsibilities include:

• Measures or weighs specified amounts of oxide, water, and acid, using barrels, buckets, or measuring tanks.
• Dumps barrels of oxide into mixer or into pit equipped with bucket elevator and conveyor leading to mixer.
• Starts mixer and turns valves to add specified amount of water and acid to oxide.
• Tests sample of paste for temperature, solidity, and density, using probe thermometer, penetrometer, and gram scale and records results.
• Dumps mixture into cart and pushes or pulls cart to pasting machine.
• Records batch weight and starting and withdrawal time.
• Cleans machine, using water and brush.
• May tend equipment to heat and mix ingredients of liquid paste and be designated Paste Mixer, Liquid (elec.
• equip.).