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FLEXO Magazine : March 2010
26 FLEXO MARCH 2010 www.flexography.org TECHNOLOGIES & TECHNIQUES dress this with your anilox supplier. If your end seal is running on engraved cells, there is ink being supplied to the radius of that end seal. This will cause an ink build up in a short amount of running time and will likely cause that seal to fail prematurely. Check your chambers to make sure the end seal slots are in good shape. As I mentioned above, after years of cleaning with metal tools, the slots can become chipped and damaged enough that an end seal just can't seal up as it's intended to. Now that you hopefully have the proper size end seal, it's time to take a look at what it is up against: the anilox roller. The most common harmful issue here is chips on the ends of the rollers. Rollers get dinged while changing, cleaning, stor- ing, moving, or just by sitting innocently on a cart and having something else bang up against them. (I strongly recommend roll covers; they can pay for themselves so quickly.) These dings not only carry ink up to the end seal, causing build ups, they also can physically tear up an end seal rather Improper selection and implementation of a simple end seal can lead to a messy situation. Check your ends seals for the proper radius.
Sustainable Winter 2010