A professional who operates equipment that refines raw linseed oil for use in manufacture of paint, lacquers, white lead paste, and high-speed printing ink. Respnsibilities include:

• Starts pump to transfer raw linseed oil from storage tank into refining tank, and starts agitator paddles.
• Opens valve to drain settled tar and foreign matter from tank.
• Opens tank steam valve to heat mixture.
• Sprays hot water over oil with hose to neutralize acid and allows water to settle.
• Opens valve to drain water from tank.
• Starts agitator paddles and adds dry neutralizing ingredients, such as whiting compound, powdered magnesia, and common salt.
• Observes material during refining process to determine if color and consistency meets standards, and removes sample for laboratory tests.
• Opens valve to permit oil to flow into storage tank.
• Sets thermostat and steam valve to maintain required temperature in storage tank.