A professional who tends one or more grinding mills to pulverize mica. Respnsibilities include:

• Fills hopper of mill with mica, using tractor equipped with scoop.
• Opens hopper gate to start flow of mica into mill and turns valve to admit specified amount of water into mill.
• Starts mill to grind mica for specified length of time.
• Feels sample of mixture and adds water to mill to maintain slurry-like consistency.
• Circulates water through mill at end of grinding cycle to flush ground mica from mill, through intermediate tank, and into settling tank.
• Shovels oversize mica from bottom of intermediate tank back into mill.