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FLEXO Magazine : May 2012
ters. If the resin is more soluble, then slower solvent is needed so that the ink will better resolubilize on the plate and anilox. STRONGER IN COLOR As press speeds increase the anilox volumes typically decrease. This is due to the defect of misting. Misting usually occurs when too much ink is applied. This yields a fine ink dust that settles on the press equipment. Misting is seen when the deeper aniloxes are used (above ~ 6 .0 – 7.0 BCM), so the best solution is to move to shallower aniloxes which minimize the misting defect. However, even with a shallower anilox, the expectation is that the same color strength will need to be delivered. This forces the ink strength to be higher. In summary, using finer anilox rolls to get the same color strength requires a stronger ink to be used. CONCLUSION Converters who have invested millions of dollars in high- speed presses over the past five years as a way to improve efficiencies should make sure they maximize that investment by using the right ink for high-speed presses. By doing so, converters will maximize efficiencies in the workplace and stretch their dollars even further by avoiding downtime and wasted print. n About the Author: Jim Felsberg is a field market- ing manager at Sun Chemical. He is respon- sible for a variety of high-speed flexo lamina- tion and surface solvent- based inks including: Sun- Strato® Velocity DPT-285, SunStrato® Velocity XV-98 , SunSpectro® Sunsharp, and SunSpectro® Sun- sharp HR. Jim can be reached at 704-587-8363 or by email at Jim.Fels- firstname.lastname@example.org. 24 FLEXO may 2012 www.flexography.org