A professional who controls equipment to blend butadiene-styrene latexes together with processing oils, stabilizers, and other additives to produce various kinds of synthetic rubber according to formulas. Respnsibilities include:

• Turns valves to connect pipelines from storage tanks to blending tanks or weigh tanks.
• Starts pumps and agitators.
• Turns valves to discharge blended materials from tanks into streams for coagulation.
• Pumps latex into blending tanks to obtain specified mixtures.
• Gauges tank or observes markings on side of tank to verify specified volumes of each type of latex.
• Observes dials and pumps specified amounts of additive materials into weigh tanks.
• Discharges additives into blending tanks.
• Takes samples of blends for laboratory testing.
• Records blend data in logs.