A professional who controls gas- or steam-heated kettles to produce various grades of lubricating grease. Respnsibilities include:

• Pours specified quantities of ingredients, such as melted fats, mineral oils, and soda or lime base, into kettle, and starts agitator to stir mixture to required consistency.
• Adjusts kettle temperature controls to form basic soap from mixture.
• Turns off heat and adds water, dye, and various mineral oils to soap in designated proportions for emulsification.
• Stirs and reheats mixture to produce grease of required texture.