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FLEXO Magazine : October 2012
A picture is worth 1,000 words. Leading Cleaning Technology 888.493.5396 • www.flexowashus.com FLEXO WASH CLEAN THEIR CLEAN A picture is worth 1,000 words. FLEXO WASH CLEAN THEIR CLEAN typical flexible packaging presses using only C,M,Y,K inks (within an accuracy lower than 3 ∆E). CONSEQUENCES fOr COLOr Research has also taught us that adding more ink does not necessarily reproduce a solid ink accurately. It may provide more color, but does this match the color required? Figure 14 reflects spectrum measurements of ISO magenta ink based on additional laydown. It shows that the tint of the ink actually drifts away from the ISO color match —in this case, toward red. With an unacceptable ∆e of 6.56, the high- est ink laydown is far from matching the required color. Full HD flexo allows a printer to reproduce a good SID with the optimum ink transfer. The optimal ink transfer results in no pinholes, while the optimum SID delivers solid colors that match their ISO standards. So, at the end, both dot shapes—digital round top plates and conventional flat top plates—have their own justifications in the flexible packaging printing process. High definition flexo has helped flexo printers compete with offset and gravure technolo- gies by offering a more complete tonal range from highlight to shadow. This offers more vibrant colors, much softer highlights, and a broader range of Pantone colors available to emulate in CMYK—or extended up to 7-color gamut. As more printers gain more experience with full HD flexo, we can expect some extraordinary examples of package printing in the near future. Recent awards by the German FTA (DFTA) are just the beginning of a bright future for this technology. n About the Author: Ian Hole is vice president of market devel- opment for Esko. figure 14: Spectrum measurements of ISO magenta ink, based on additional laydown. The tint of the ink actually drifts away from the ISO color match, in this case toward red. With an unacceptable ∆e of 6.56, the highest ink laydown is far from matching the required color. www.flexography.org OcTOber 2012 FLEXO 67