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FLEXO Magazine : November 2011
Technologies & Techniques RUN-TO-RUN REPEATABILITY • For a minimal outlay of cash and a bit of discipline, the quality of flexographic printing can be increased. • There are three mainstream choices for circulating systems on flexo presses: centrifugal, diaphragm, and peristaltic. • Today’s flexo inks are designed and formulated to achieve the correct color at the correct film thickness and at a specific viscosity, pH, and temperature. • Automatic viscosity controllers, of varied designs, provide run-to-run repeatability, press interfaces, and precision hands-off control. Clockwise, from top right: peristaltic pump with air mixer in tank; centrifugal pump and tank combo, centrifugal pump/tank combo with in-line filter and magnet, air-driven diaphragm pumps. Photos: graymills. 36 FLeXO november 2011 www.flexography.org rare earth magnet insert Filter body with filter screen and rare earth magnet. FLX_November11.indd 36 11/8/11 3:54 PM