Makes ready and operates web or sheet-fed offset printing press to print single and multicolor copy from lithographic plates. Measures paper thickness and adjusts space between blanket and impression cylinders according to thickness of paper stock. Measures plate thickness and inserts packing sheets on plate cylinder to build up plate to printing height and installs and locks plate into position, using hand tools, to achieve pressure required for printing. Starts press, examines printed copy for ink density, position on paper, and registration, and makes adjustments to press throughout production run to maintain specific registration and color density.
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