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FLEXO Magazine : February 2010
32 FLEXO FEBRUARY 2010 www.flexography.org .5% 1% 3% 4% 5% 6% 8% 10% 20% 30% 40% 50% 60% 70% 75% 90% 80% 91% 92% 93% 94% 95% 96% 97% 98% 99% 100% 2% 25% .5% 100% screened tints with lower amplitude of variation between the low- est densitometer reading and the highest densitometer reading than the conventional flexographic printing cylinder package. PEC plating system removed almost all visible banding, but when banding did occur the variation in density between the bands was less than half that recorded from the conventional plate cylinders. While there are many more variables that could be researched concerning the PEC quality enhancements, it seems obvious from this research that there are significant quality improvements in most of the areas tested. And, as indicated above, PEC performance would possibly be greater if tested on different press types. The manufacturer has introduced a higher durometer coating during the time this research project was under- taken. It claims this product will deliver the same results on un-supported film, and other high hold out substrates, as their standard product delivers on paper. This potential study, combined with further research on a press with independent anilox to plate impression control, sounds like a research op- portunity for some young flexographer! ABOUT THE AUTHOR: Dr. E. Dean Gilbert is an associate professor in the Department of Graphic Communication at Appalachian State University. He has some 30 years of teach- ing experience at the college level. Gilbert has expertise in a wide range of graphic communication subjects, though his research and publishing interest are in packaging, flexogra- phy, and variable data printing. He holds a Bachelor's and Master's degree from Appalachian State University and the Ed.D. degree from Clemson University. Performance Enhancing Cylinders (PEC) are a patented product exclusively available from Nu Tech Coatings, Johnson City, TN. For more information, contact Jim Wyman at 770-655-2649, firstname.lastname@example.org. The test image. TECHNOLOGIES & TECHNIQUES