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FLEXO Magazine : August 2011
40 FLEXO AUGUST 2011 www.flexography.org turner-bars, plough-fold shoes, perforation(s), laminating and/ or delaminating units, hot-stamping, embossing, die-cutting, stripping and wind-up units. One can even make use of insert printing units, like silkscreen and cold-foil, both of which need a flexo printing unit as a base. When it comes to increasing the number of UV-flexo print- ing units, the stimulus often is driven by a requirement to print on multiple surface labels. The multi-layer labels partly need recto-verso UV-flexo printing, which doubles the number of printing units necessary for all the colors on both printing- sides of the substrate. The classic example of this technology in action is the peel-off label, where consumers remove and unfold such labels to discover application-instructions. These days, European General Food-law, consumer and patient protective laws and regulations are stimulating such label- complexity, especially because of high-liability risks. Expanded color gamut printing represents another busi- ness driver for the UV flexo press. Consumers relate labels to brand-colors, many of which go far beyond the traditional boundaries of CMYK and enter the realm of attractive, specialty content colors--brilliant radiants, metallic, glow, magnetic, Hexachrome, Opaltone and other color scales. For example, a silver-metallic can be applied for decorative ornaments in the artwork, but also used as an under or base color. That means other colors are printed on top of it, in order to create a metallic characterized color-picture or typeface. Similarly, a brilliant metallic green, can be created by over- printing the silver-metallic under color with transparent yellow plus cyan inks. Colors printed over the silver-metallic under color, have to be transparent to guarantee the final metallic gloss in the colors. The rest of the artwork, however, may need opaque colors. These conditions easily require a label press configuration of 10 UV-flexo printing units. VERSATILE & AFFORDABLE In addition to offering a wide range of complex possibilities, a very long UV-flexo label press, like the 14-printing unit line, should also be an affordable investment. Press manufactur- ers compose such long lines with automated intelligence from standard components---printing units, converting units, automation units, etc.---to bring about that reality. It requires extensive and detailed consultations between customer and developers.