A professional who tends equipment that bleaches and filters unrefined lard or edible oil. Respnsibilities include:

• Starts pumps to draw unrefined material from storage tank into bleaching kettle.
• Dumps prescribed amount of fuller's earth into kettle to absorb impurities in material.
• Starts agitators to mix materials.
• Turns valves to allow steam or cool water to circulate through bleacher coils to heat or cool material to specified temperature.
• Draws sample of material for laboratory analysis.
• Dumps additional fuller's earth in kettle as directed.
• Inserts new filter cloths on filter plates.
• Starts pumps to draw material from bleaching kettle and force it through filter-press.
• Starts pumps to drain bleached and filtered material from filter-press tank into storage tank.