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    Stack Press

    A type of multi-color press used in flexography in which all the color stations—from one to eight stations, with six being the most common—are oriented in a vertical stack, the substrate passing through each one, which lays down successive colors. Some stack presses comprise two parallel stacks, the web of substrate taking a U-shaped path through the press. Each color station possesses its own independent set of inking rollers, plate cylinder, and impression cylinder, in contrast to a central impression press which utilizes a large-diameter common impression cylinder which brings the substrate into contact with each color station. See Flexography: Press Configurations.

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