A professional who tends mottling machines that blend prescribed color mixes to achieve specified patterns or shade combinations for finished hard-surface floor covering. Respnsibilities include:

• Selects specified mix from storage area and moves mix to charging station, using handtruck.
• Divides panned mix into portions, according to formula, weighs fractional quantities on balance scale, and dumps them into hopper of machine.
• Weighs filler, whiting, and other material as specified, using floor scale, and dumps them into hopper.
• Sets timer on mottler for prescribed cycle, or examines mix periodically to determine when desired mottle has been achieved.
• Shovels mottled mix into trucks for delivery to storage area.