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FLEXO Magazine : November 2010
Technologies & Techniques Right Tape/Right Plate: How Do I Tell? solid elastomer Ribs improve quality on Bounce-Prone Jobs By John R. Rastetter Displacement technology, unlike cellular foam tapes, al- lows the printer to use one tape for all types of designs. The end result is pinhole-free solids, sharp reverses, and sharp tone reproduction. You will also find that there is no need for makeready techniques on combination work. Capitalizing on a commonly known theory in physics, “The Path of Least Resistance,” when external pressure is applied to the print blanket, the solid elastomeric channel displaces across the web, not in the rotational direction like cellular foam. The affect on press is significant; printers have reported average press speed increases of 25 percent or more on jobs that are bounce prone. And as an example, a specific job that was limited to 800fpm press speed was increased to 1,100fpm, while increasing print quality and solid ink density. On your longest runs, where you need to remount the job because of plate wear; have you ever considered that the real culprit could be your mounting tape? It doesn’t matter if you are using open or closed cell foam tapes, the cell structure will deteriorate over time. This deterioration causes sinking and gauge loss and with it the loss of print fidelity as impres- sion is increased. Using solid elastomer ribs for controlled displacement insures that the product holds gauge for as long as the job runs, no matter how many times it is in and out of the press. And because gauge consistency is held: • Print quality is consistent. • Plate wear is significantly reduced. • Plates run cleaner for longer periods of time. Your choice of tape can provide much more benefit to your organization than meeting the brand owners’ print quality requirements. When was the last time you were successful in getting a price increase because the job looked better than the last time you ran the same or a similar job? What can pro- vide added profit are productivity improvements. Here is a comparison of displacement technology to cellular foam tape Wide web flexible packaging 8 Color job Run length, 1 .5 million lineal feet Print Blanket Cellular Foam Tape Job Length 1,500,000 1,500,000 Press Speed, FPM 1100 800 Lineal feet before plate cleaning 140,000 45,000 Time used in plate cleaning, min 30 30 Hours of press time 28.1 47.9 This example shows the compounding affect of improved press speed and cleaner running plates, getting the job off press 19.8 hours earlier than they would have if they continued to use cellular foam tapes. The example above is a job that was press speed limited by bounce. Typical productivity improvements start around 20 percent and up. Displacement technology provides significant opportunities to improve print quality and consistency while improving your bottom line. n About the Author: John R. Rastetter is vice president of sales & marketing for Controlled Displacement Technologies the manufacture of ChannalBAC. Rastetter can be contacted regarding comments or questions at (770) 881-1884 or email@example.com • Improve bottom line consistency. • No need for make ready techniques on combo work. • Borrows on Physics theory: “Path of Least Resistance.” A micrograph of blanket technology. The print blanket, delivered in roll form. 56 FLeXO novemBeR 2010 www.flexography.org MAXIMIZE YOUR HUMAN CAPITAL FOR FLEXOGRAPHIC EXCELLENCE MaxiMize Your Human Capital for flexographic excellence • Maximize efficiency • Boost productivity • Obtain color accurate & consistent results • Give your plant a true competitive advantage • Satisfy your customers faster than ever before • Keep repeat orders flowing • Promote enthusiasm, initiative & innovation among employees The end result? Proficiency –demonstrated by high-quality, repeatable & consistent results. FFTA’s FIRST Operator Certification Program, administered online via the TEST Virtual Campus, is the flexo industry’s standard of excellence. Contact us at 631-737-6020 to setup a demo and begin your journey to a FIRST Certification today! Visit www.flexography.org to learn more. FIRST_Impl_ad_mech.indd 1 6/4/10 1:16 PM FLX_Nov10_mech.indd 56 11/1/10 2:25 PM
Sustainable Fall 2010